3D scanning technology allows capturing the shape of physical objects and environments and converting them into digital 3D models. There are several 3D scanning technologies that differ in their principles such as laser triangulation, structured light, photogrammetry, and contact-based scanning. These technologies find applications in industries like automotive, aeronautics, dental, jewelry, video games, and movies. Each technology has advantages and limitations related to aspects like speed, resolution, ability to scan certain surfaces, and sensitivity to lighting conditions.
The first step into the new approaches, developments, discoveries and tools of technology is to believe in yourself. In your own creativity power. The next, comes alone [for free].
3D Scanners and their Economic FeasibilityJeffrey Funk
These slides use concepts from my (Jeff Funk) course entitled analyzing hi-tech opportunities to analyze how the economic feasibility of 3D scanners is becoming better through improvements in lasers, camera ICs, and processor ICs. 3D scanning is both a complement to 3D printing and a technology with its own unique applications. 3D printing of complex objects can be done from a CAD database or from a 3D scan where a 3D scan can be done with laser or other sources of white light such as LEDs.
3D scanning can also be done for other purposes. For example, scientists and engineers are using 3D scanners to survey archeological, construction, crime scene, and engineering sites, to document maintenance and repair of engineered systems, and to customize medical and dental products for humans. Improvements in lasers, LEDs, camera chips, ICs, and other components continue to improve the economic feasibility of 3D scanning. Longer wavelength lasers increase the scanning range, better camera chips improve the scanning resolution, and better lasers, camera chips, and processor ICs reduce the scanning time. For example, third generation scanners from Argon, one leading supplier, have 100 times higher resolution and one tenth the scan times of Argon’s first generation system.
For costs, lasers make up the largest percentage followed by camera and processor ICs. For example, lasers make up 80% of the hardware cost for one high-end system with a current cost of $1346 and a price of about $3000. As laser costs fall and as volumes enable smaller margins, the price of such systems will fall.
For the same reasons, low-end systems continue to emerge. These include Microsoft’s Kinect and an app for the iPhone. Microsoft’s Kinect was $150 while the app was only $4.99, both in early 2013. As such low-end systems proliferate, and high-end systems continue to get cheaper, 3D scanning will find new applications.
The first step into the new approaches, developments, discoveries and tools of technology is to believe in yourself. In your own creativity power. The next, comes alone [for free].
3D Scanners and their Economic FeasibilityJeffrey Funk
These slides use concepts from my (Jeff Funk) course entitled analyzing hi-tech opportunities to analyze how the economic feasibility of 3D scanners is becoming better through improvements in lasers, camera ICs, and processor ICs. 3D scanning is both a complement to 3D printing and a technology with its own unique applications. 3D printing of complex objects can be done from a CAD database or from a 3D scan where a 3D scan can be done with laser or other sources of white light such as LEDs.
3D scanning can also be done for other purposes. For example, scientists and engineers are using 3D scanners to survey archeological, construction, crime scene, and engineering sites, to document maintenance and repair of engineered systems, and to customize medical and dental products for humans. Improvements in lasers, LEDs, camera chips, ICs, and other components continue to improve the economic feasibility of 3D scanning. Longer wavelength lasers increase the scanning range, better camera chips improve the scanning resolution, and better lasers, camera chips, and processor ICs reduce the scanning time. For example, third generation scanners from Argon, one leading supplier, have 100 times higher resolution and one tenth the scan times of Argon’s first generation system.
For costs, lasers make up the largest percentage followed by camera and processor ICs. For example, lasers make up 80% of the hardware cost for one high-end system with a current cost of $1346 and a price of about $3000. As laser costs fall and as volumes enable smaller margins, the price of such systems will fall.
For the same reasons, low-end systems continue to emerge. These include Microsoft’s Kinect and an app for the iPhone. Microsoft’s Kinect was $150 while the app was only $4.99, both in early 2013. As such low-end systems proliferate, and high-end systems continue to get cheaper, 3D scanning will find new applications.
Reverse Engineering
Definition
It is described in Wikipedia as:
… the process of extracting knowledge or design information from anything man-made. The process often involves disassembling something (a mechanical device, electronic component, computer program, or biological, chemical, or organic matter) and analyzing its components and workings in detail.
Reverse Engineering
Definition
A process of discovering the technological principles of a human made device, object or system through analysis of its structure, function and operation
Systematic evaluation of a product with the purpose of replication.
Design of a new part
Copy of an existing part
Recovery of a damaged or broken part
An important step in the product development cycle.
Revolutionary and powerful technology with wide range of application.
The process involve quick building up of a prototype or working model for the purpose of testing the various design features, ideas, concepts, functionality, output and performance.
A complete illustrated ppt on 3D printing technology. All the additive processes,Future and effects are well described with relevant diagram and images.Must download for attractive seminar presentation.3D Printing technology could revolutionize and re-shape the world. Advances in 3D printing technology can significantly change and improve the way we manufacture products and produce goods worldwide. If the last industrial revolution brought us mass production and the advent of economies of scale - the digital 3D printing revolution could bring mass manufacturing back a full circle - to an era of mass personalization, and a return to individual craftsmanship.
This is the seminar report of my presentation
Link for the pressentaion file is
http://www.slideshare.net/arjunrtvm/3d-printing-additive-manufacturing-with-awesome-animations-and-special-effects
3D printing, also known as additive manufacturing (AM), refers to various processes used to synthesize a three-dimensional object.[1] In 3D printing, successive layers of material are formed under computer control to create an object.[2] These objects can be of almost any shape or geometry and are produced from a 3D model or other electronic data source. A 3D printer is a type of industrial robot.
X-rays were discovered in 1895 by the German physicist Wilhelm Conrad Röntgen,
who earned the Nobel Prize in Physics in 1901. Although their potential applications
in medical imaging diagnosis were clear from the beginning, the implementation of
the first X-ray computed tomography system was made in 1972 by Godfrey Newbold
Hounsfield (Nobel prize winner in 1979 for Physiology and Medicine), who constructed
the prototype of the first medical CT scanner and is considered the father of computed
tomography. CT was introduced into clinical practice into 1971 with a scan of a cystic
frontal lobe tumor on a patient at Atkinson Morley Hospital in Wimbledon (United
Kingdom). After this, CT was immediately welcomed by the medical community and
has often been referred to as the most important invention in radiological diagnosis, since
the discovery of X-rays [1].
The first applications of CT in an industrial context is traced back to the first 1980´s, in the
field of non destructive testing, where small number of slices of the object were visually
inspected. 3D quantitative industrial CT applications appeared in the later 1990s, with
simple volume and distance analysis [2]. Today, thanks to relevant improvements in both
hardware and software, CT has become a powerful and widely used tool among non
destructive techniques, capable of inspecting external and internal structures (without
destroying them) in many industrial applications. Development of more and more stable
X-ray sources and better detectors led to design of more complex CT system, providing
accurate geometrical information with micrometer accuracy. CT is widely used for
geometrical characterization of test objects, material composition determination, density
variation inspection etc. In a relative short time, CT is capable to produce a complete
three-dimensional model and tolerances of the scanned machined parts can be verified.
Because of the growing interest on precision in production engineering and an increasing
demand for quality control and assurance, CT is leading the field of manufacturing
and coordinate metrology. With respect to traditional techniques, CT systems have indisputable advantages: internal and external geometry can be acquired without
destroying the part, with a density of information much higher than common tactile and
optical coordinate measuring. A key parameter for reliability of the measurement process
is the establishment of measuring uncertainty. Since there are many influence parameters
in CT, uncertainty contributors in CT and standards dealing with quantification of CT
have not been completely established yet. The assessment of the uncertainty budget
becomes a challenge for all researchers
Reverse Engineering
Definition
It is described in Wikipedia as:
… the process of extracting knowledge or design information from anything man-made. The process often involves disassembling something (a mechanical device, electronic component, computer program, or biological, chemical, or organic matter) and analyzing its components and workings in detail.
Reverse Engineering
Definition
A process of discovering the technological principles of a human made device, object or system through analysis of its structure, function and operation
Systematic evaluation of a product with the purpose of replication.
Design of a new part
Copy of an existing part
Recovery of a damaged or broken part
An important step in the product development cycle.
Revolutionary and powerful technology with wide range of application.
The process involve quick building up of a prototype or working model for the purpose of testing the various design features, ideas, concepts, functionality, output and performance.
A complete illustrated ppt on 3D printing technology. All the additive processes,Future and effects are well described with relevant diagram and images.Must download for attractive seminar presentation.3D Printing technology could revolutionize and re-shape the world. Advances in 3D printing technology can significantly change and improve the way we manufacture products and produce goods worldwide. If the last industrial revolution brought us mass production and the advent of economies of scale - the digital 3D printing revolution could bring mass manufacturing back a full circle - to an era of mass personalization, and a return to individual craftsmanship.
This is the seminar report of my presentation
Link for the pressentaion file is
http://www.slideshare.net/arjunrtvm/3d-printing-additive-manufacturing-with-awesome-animations-and-special-effects
3D printing, also known as additive manufacturing (AM), refers to various processes used to synthesize a three-dimensional object.[1] In 3D printing, successive layers of material are formed under computer control to create an object.[2] These objects can be of almost any shape or geometry and are produced from a 3D model or other electronic data source. A 3D printer is a type of industrial robot.
X-rays were discovered in 1895 by the German physicist Wilhelm Conrad Röntgen,
who earned the Nobel Prize in Physics in 1901. Although their potential applications
in medical imaging diagnosis were clear from the beginning, the implementation of
the first X-ray computed tomography system was made in 1972 by Godfrey Newbold
Hounsfield (Nobel prize winner in 1979 for Physiology and Medicine), who constructed
the prototype of the first medical CT scanner and is considered the father of computed
tomography. CT was introduced into clinical practice into 1971 with a scan of a cystic
frontal lobe tumor on a patient at Atkinson Morley Hospital in Wimbledon (United
Kingdom). After this, CT was immediately welcomed by the medical community and
has often been referred to as the most important invention in radiological diagnosis, since
the discovery of X-rays [1].
The first applications of CT in an industrial context is traced back to the first 1980´s, in the
field of non destructive testing, where small number of slices of the object were visually
inspected. 3D quantitative industrial CT applications appeared in the later 1990s, with
simple volume and distance analysis [2]. Today, thanks to relevant improvements in both
hardware and software, CT has become a powerful and widely used tool among non
destructive techniques, capable of inspecting external and internal structures (without
destroying them) in many industrial applications. Development of more and more stable
X-ray sources and better detectors led to design of more complex CT system, providing
accurate geometrical information with micrometer accuracy. CT is widely used for
geometrical characterization of test objects, material composition determination, density
variation inspection etc. In a relative short time, CT is capable to produce a complete
three-dimensional model and tolerances of the scanned machined parts can be verified.
Because of the growing interest on precision in production engineering and an increasing
demand for quality control and assurance, CT is leading the field of manufacturing
and coordinate metrology. With respect to traditional techniques, CT systems have indisputable advantages: internal and external geometry can be acquired without
destroying the part, with a density of information much higher than common tactile and
optical coordinate measuring. A key parameter for reliability of the measurement process
is the establishment of measuring uncertainty. Since there are many influence parameters
in CT, uncertainty contributors in CT and standards dealing with quantification of CT
have not been completely established yet. The assessment of the uncertainty budget
becomes a challenge for all researchers
An algorithm to quantify the swelling by reconstructing 3D model of the face with stereo images is presented. We
analyzed the primary problems in computational stereo, which include correspondence and depth calculation. Work has been carried out to determine suitable methods for depth estimation and standardizing volume estimations. Finally we designed software for reconstructing 3D images from 2D stereo images, which was built on Matlab and Visual C++. Utilizing
techniques from multi-view geometry, a 3D model of the face was constructed and refined. An explicit analysis of the stereo
disparity calculation methods and filter elimination disparity estimation for increasing reliability of the disparity map was
used. Minimizing variability in position by using more precise positioning techniques and resources will increase the accuracy of this technique and is a focus for future work
Digital 3D imaging can benefit from advances in VLSI technology in order to accelerate its deployment in many fields like visual communication and industrial automation. High-resolution 3D images can be acquired using laser-based vision systems. With this approach, the 3D information becomes relatively insensitive to background illumination and surface texture. Complete images of visible surfaces that are rather featureless to the human eye or a video camera can be generated. Intelligent digitizers will be capable of measuring accurately and simultaneously color and 3D.
Lets Understand the overall working of photogrammetry. Get ideas about photogrammetry branches. Also, check the difference between photogrammetry and remote sensing.
In this presentation, Victor Gramm describes what he's learned as a 3D Print enthusiast. Victor mentions free mentions free, low-cost, and open-source , as well as commercially available solutions for 3D Scanning, photogrammetry, and 3D Modeling. While not an expert on the topic, Victor employs his enthusiasm in an effort to gather consensus on the level of interest in these domains in his area, share what he's learned, and to elicit further dialogue on the topic.
Basics of 3D scanning and how structured light scanning worksSowmiya Siva
Aravind Accurate provide the best design solution for all types of Engineering industries by 3D Modelling Services in Coimbatore and advanced Technological Tool, their services include CMM Inspection Service in Coimbatore, Reverse Engineering Services in Coimbatore and more.
Revolutionizing Surveying: The Power of 3D Laser Scanning Services.pptxfalconsurveyme
we discuss, examine the advantages, uses, and future of 3D laser scanning survey services.
Visit us: https://www.falconsurveyme.com/our-services/laser-scanning/
Wireless network implementation is a viable option for building network infrastructure in rural communities. Rural people lack network infrastructures for information services and socio-economic development. The aim of this study was to develop a wireless network infrastructure architecture for network services to rural dwellers. A user-centered approach was applied in the study and a wireless network infrastructure was designed and deployed to cover five rural locations. Data was collected and analyzed to assess the performance of the network facilities. The results shows that the system had been performing adequately without any downtime with an average of 200 users per month and the quality of service has remained high. The transmit/receive rate of 300Mbps was thrice as fast as the normal Ethernet transmit/receive specification with an average throughput of 1 Mbps. The multiple output/multiple input (MIMO) point-to-multipoint network design increased the network throughput and the quality of service experienced by the users.
3D reconstruction is a technique used in computer vision which has a wide range of applications in areas like object recognition, city modelling, virtual reality, physical simulations, video games and special effects. Previously, to perform a 3D reconstruction, specialized hardwares were required. Such systems were often very expensive and was only available for industrial or research purpose. With the rise of the availability of high-quality low cost 3D sensors, it is now possible to design inexpensive complete 3D scanning systems. The objective of this work was to design an acquisition and processing system that can perform 3D scanning and reconstruction of objects seamlessly. In addition, the goal of this work also included making the 3D scanning process fully automated by building and integrating a turntable alongside the software. This means the user can perform a full 3D scan only by a press of a few buttons from our dedicated graphical user interface. Three main steps were followed to go from acquisition of point clouds to the finished reconstructed 3D model. First, our system acquires point cloud data of a person/object using inexpensive camera sensor. Second, align and convert the acquired point cloud data into a watertight mesh of good quality. Third, export the reconstructed model to a 3D printer to obtain a proper 3D print of the model.
3D reconstruction is a technique used in computer vision which has a wide range of applications in areas like object recognition, city modelling, virtual reality, physical simulations, video games and special effects. Previously, to perform a 3D reconstruction, specialized hardwares were required. Such systems were often very expensive and was only available for industrial or research purpose. With the rise of the availability of high-quality low cost 3D sensors, it is now possible to design inexpensive complete 3D scanning systems. The objective of this work was to design an acquisition and processing system that can perform 3D scanning and reconstruction of objects seamlessly. In addition, the goal of this work also included making the 3D scanning process fully automated by building and integrating a turntable alongside the software. This means the user can perform a full 3D scan only by a press of a few buttons from our dedicated graphical user interface. Three main steps were followed to go from acquisition of point clouds to the finished reconstructed 3D model. First, our system acquires point cloud data of a person/object using inexpensive camera sensor. Second, align and convert the acquired point cloud data into a watertight mesh of good quality. Third, export the reconstructed model to a 3D printer to obtain a proper 3D print of the model.
COMPLETE END-TO-END LOW COST SOLUTION TO A 3D SCANNING SYSTEM WITH INTEGRATED...ijcsit
3D reconstruction is a technique used in computer vision which has a wide range of applications in
areas like object recognition, city modelling, virtual reality, physical simulations, video games and
special effects. Previously, to perform a 3D reconstruction, specialized hardwares were required.
Such systems were often very expensive and was only available for industrial or research purpose.
With the rise of the availability of high-quality low cost 3D sensors, it is now possible to design
inexpensive complete 3D scanning systems. The objective of this work was to design an acquisition and
processing system that can perform 3D scanning and reconstruction of objects seamlessly. In addition,
the goal of this work also included making the 3D scanning process fully automated by building and
integrating a turntable alongside the software. This means the user can perform a full 3D scan only by
a press of a few buttons from our dedicated graphical user interface. Three main steps were followed
to go from acquisition of point clouds to the finished reconstructed 3D model. First, our system
acquires point cloud data of a person/object using inexpensive camera sensor. Second, align and
convert the acquired point cloud data into a watertight mesh of good quality. Third, export the
reconstructed model to a 3D printer to obtain a proper 3D print of the model.
ABSTRACT Feature extraction plays a vital role in the analysis and interpretation of remotely sensed data. The two important components of Feature extraction are Image enhancement and information extraction. Image enhancement techniques help in improving the visibility of any portion or feature of the image. Information extraction techniques help in obtaining the statistical information about any particular feature or portion of the image. This presented work focuses on the various feature extraction techniques and area of optical character recognition is a particularly important in Image processing. Keywords— Image character recognition, Methods for Feature Extraction, Basic Gabor Filter, IDA, and PCA.
What is #PointCloudAnnotation? It is creating better data models for #MachineLearning algorithms!!
Read more at: https://annotationsupport.com/blog/what-is-point-cloud-annotation/
Estimation of 3d Visualization for Medical Machinary Imagestheijes
The International Journal of Engineering & Science is aimed at providing a platform for researchers, engineers, scientists, or educators to publish their original research results, to exchange new ideas, to disseminate information in innovative designs, engineering experiences and technological skills. It is also the Journal's objective to promote engineering and technology education. All papers submitted to the Journal will be blind peer-reviewed. Only original articles will be published.
The papers for publication in The International Journal of Engineering& Science are selected through rigorous peer reviews to ensure originality, timeliness, relevance, and readability.
Estimation of 3d Visualization for Medical Machinary Imagestheijes
The International Journal of Engineering & Science is aimed at providing a platform for researchers, engineers, scientists, or educators to publish their original research results, to exchange new ideas, to disseminate information in innovative designs, engineering experiences and technological skills. It is also the Journal's objective to promote engineering and technology education. All papers submitted to the Journal will be blind peer-reviewed. Only original articles will be published.
Water scarcity is the lack of fresh water resources to meet the standard water demand. There are two type of water scarcity. One is physical. The other is economic water scarcity.
Hybrid optimization of pumped hydro system and solar- Engr. Abdul-Azeez.pdffxintegritypublishin
Advancements in technology unveil a myriad of electrical and electronic breakthroughs geared towards efficiently harnessing limited resources to meet human energy demands. The optimization of hybrid solar PV panels and pumped hydro energy supply systems plays a pivotal role in utilizing natural resources effectively. This initiative not only benefits humanity but also fosters environmental sustainability. The study investigated the design optimization of these hybrid systems, focusing on understanding solar radiation patterns, identifying geographical influences on solar radiation, formulating a mathematical model for system optimization, and determining the optimal configuration of PV panels and pumped hydro storage. Through a comparative analysis approach and eight weeks of data collection, the study addressed key research questions related to solar radiation patterns and optimal system design. The findings highlighted regions with heightened solar radiation levels, showcasing substantial potential for power generation and emphasizing the system's efficiency. Optimizing system design significantly boosted power generation, promoted renewable energy utilization, and enhanced energy storage capacity. The study underscored the benefits of optimizing hybrid solar PV panels and pumped hydro energy supply systems for sustainable energy usage. Optimizing the design of solar PV panels and pumped hydro energy supply systems as examined across diverse climatic conditions in a developing country, not only enhances power generation but also improves the integration of renewable energy sources and boosts energy storage capacities, particularly beneficial for less economically prosperous regions. Additionally, the study provides valuable insights for advancing energy research in economically viable areas. Recommendations included conducting site-specific assessments, utilizing advanced modeling tools, implementing regular maintenance protocols, and enhancing communication among system components.
TECHNICAL TRAINING MANUAL GENERAL FAMILIARIZATION COURSEDuvanRamosGarzon1
AIRCRAFT GENERAL
The Single Aisle is the most advanced family aircraft in service today, with fly-by-wire flight controls.
The A318, A319, A320 and A321 are twin-engine subsonic medium range aircraft.
The family offers a choice of engines
Welcome to WIPAC Monthly the magazine brought to you by the LinkedIn Group Water Industry Process Automation & Control.
In this month's edition, along with this month's industry news to celebrate the 13 years since the group was created we have articles including
A case study of the used of Advanced Process Control at the Wastewater Treatment works at Lleida in Spain
A look back on an article on smart wastewater networks in order to see how the industry has measured up in the interim around the adoption of Digital Transformation in the Water Industry.
Immunizing Image Classifiers Against Localized Adversary Attacksgerogepatton
This paper addresses the vulnerability of deep learning models, particularly convolutional neural networks
(CNN)s, to adversarial attacks and presents a proactive training technique designed to counter them. We
introduce a novel volumization algorithm, which transforms 2D images into 3D volumetric representations.
When combined with 3D convolution and deep curriculum learning optimization (CLO), itsignificantly improves
the immunity of models against localized universal attacks by up to 40%. We evaluate our proposed approach
using contemporary CNN architectures and the modified Canadian Institute for Advanced Research (CIFAR-10
and CIFAR-100) and ImageNet Large Scale Visual Recognition Challenge (ILSVRC12) datasets, showcasing
accuracy improvements over previous techniques. The results indicate that the combination of the volumetric
input and curriculum learning holds significant promise for mitigating adversarial attacks without necessitating
adversary training.
Industrial Training at Shahjalal Fertilizer Company Limited (SFCL)MdTanvirMahtab2
This presentation is about the working procedure of Shahjalal Fertilizer Company Limited (SFCL). A Govt. owned Company of Bangladesh Chemical Industries Corporation under Ministry of Industries.
Saudi Arabia stands as a titan in the global energy landscape, renowned for its abundant oil and gas resources. It's the largest exporter of petroleum and holds some of the world's most significant reserves. Let's delve into the top 10 oil and gas projects shaping Saudi Arabia's energy future in 2024.
Forklift Classes Overview by Intella PartsIntella Parts
Discover the different forklift classes and their specific applications. Learn how to choose the right forklift for your needs to ensure safety, efficiency, and compliance in your operations.
For more technical information, visit our website https://intellaparts.com
AKS UNIVERSITY Satna Final Year Project By OM Hardaha.pdf
3 d scanning technology
1. 3D Scanning Technology
Mr. G. Gopinath
Asst. Professor
Department of Mechanical Engineering
JB Institute of Engineering and Technology, Hyderabad
2. 3D scanning
3D scanning is a technique used to capture the shape of an object using a 3D
scanner. The result is a 3D file of the object which can be saved, edited, and
even 3D printed. Many different 3D scanning technologies exist to 3D scan
objects, environments, and people. Each 3D scanning technology comes with its
own limitations, advantages, and costs.
3. Bridging Physical and Digital world
3D scanners are tri-dimensional measurement devices used to capture real-world objects or
environments so that they can be remodeled or analyzed in the digital world. The latest
generation of 3D scanners do not require contact with the physical object being captured.
Real Object 3D Model
3D scanners can be used to get complete or partial 3D measurements of any physical object.
The majority of these devices generate points or measures of extremely high density when
compared to traditional “point-by-point” measurement devices.
4. OBJECTS ARE USUALLY SCANNED IN 3D FOR 2 PURPOSES
Extracting dimensions to reconstruct a CAD reference file for Reverse Engineering or Rapid Prototyping
Measuring the object itself for analysis and documentation. This is done for applications such as computer –
Aided Inspection (CAI) and analysis (CAE)
5. Applications
3D scanners are powerful tools for professionals in several industries, such as
automotive,
aeronautics,
dental,
jewelry,
video games,
special effects,
animation movies.
6. 3D scanning technologies rely on different physical
principles and can be classified in categories:
Laser triangulation 3D scanning technology, as illustrated on the image, projects a laser
beam on a surface and measures the deformation of the laser ray.
Structured light 3D scanning technology measures the deformation of a light pattern on
a surface to 3D scan the shape of the surface.
Photogrammetry, also called 3D scan from photographies, reconstructs in 3D a subject
from 2D captures with computer vision and computational geometry algorithms.
Contact-based 3D scanning technology relies on the sampling of several points on a
surface, measured by the deformation of a probe.
7. Laser triangulation 3D scanning technology
Laser triangulation-based 3D scanners use either a laser line or a single
laser point to scan across an object. The laser is first cast by the 3D
scanner. As the laser light reflects off the 3D scanned object, its initial
trajectory is modified and picked up by a sensor. From the modification
of the laser trajectory and trigonometric triangulation, the system can
discern a specific deviation angle. The calculated angle is directly linked
to the distance from the object to the scanner. When the 3D scanner
collects enough distances, it is capable of mapping the surface’s object
and of creating a 3D scan.
its resolution and accuracy.
Very shiny or transparent surfaces are particularly problematic
8. Structured light 3D scanning technology
Structured light 3D scanners use trigonometric
triangulation but do not rely on a laser. Instead, the
structured light 3D scanning technology works with the
projection of a series of linear patterns onto an object. The
system is then capable to examine the edges of each line
in the pattern and to calculate the distance from the
scanner to the object’s surface. The structured light used for
3D scanning can be white or blue
its speed, resolution and ability to 3D
scan people
its sensibility to lighting conditions and issues to work
outside
9. Photogrammetry 3D scanning technology (photography)
Photogrammetry is the science of making
measurements from photographs, especially for
recovering the exact positions of surface points. The
principle of photogrammetry is to analyze several
photographs of a static subject, taken from
different viewpoints, and to automatically detect
pixels corresponding to a same physical point. The
data input required from the user are the
parameters of the camera such as focal length
and lens distortion.
its precision and acquisition speed
its sensitivity to the resolution of the input photographs
and the time it takes to run the algorithms.
10. Contact-based 3D scanning technology
Contact-based 3D scanning is also known as
digitizing. The contact technology for 3D scanning
implies a contact based form of 3D data
collection. Contact 3D scanners probe the subject
through physical touch, while the object is firmly held
in place. A touching probe is moved on the surface to
various points of the object to record 3D information.
The probe is sometimes attached to an articulated
arm capable of collecting all its respective
configurations and angles for more precision. Some
specific configurations of contact-based 3D scanners
are called Coordinated Measuring Machines (CMM).
its precision and ability to 3D scan transparent
or reflective surfaces.
its speed and inadequacy to work with
freeform shapes.