This is a presentation slide based on scanner

1. Welcome
to
The Presentation
Name of Topic: Scanner
Course Code: CSE 1103

2. Submitted By :
Lamia Islam Lima
ID: 11220320831
Department: CSE
Section: 1A
Semester: Fall 2022
Date of Presentation:
Submitted To :
Pritom Khan Boni
Lecture in CSE
Department of CSE
Northen University of Business & Technology Khulna.

3. Contains of Topic
 Introduction of Scanner
 Types of Scanner
 Describe of Flat bed scanners
 Describe of Sheet fed scanners
 Describe of Hand held scanners
 Describe of Drum Scanners
 Using Scanner
 Scanning Formats
 After Scanning
 Applications Programming Interface
 Conclusion

4. Introduction :
 scanner is a input device.
 It reads the graphical images or line art or text from the source and converts it into
digital information and send it to the computer.
 Scanner is electronic device that scans data.
 Scanner are used to give large volume of data as input to the compuer.
 It can be stored on a computer through optical character recognition (OCR).

5. What types of Scanner:
 Flatbed scanners
 Sheetfed scanners
 Handheld scanners
 Drum Scanners

6. Describe of Scanners:
 Flatbed scanners :
 Used for scanning most of doucments , photo and even flat objects from a PC or
laptop.
 Flatbd scanner works like copy machine.
 Scans documents placed face down on the glass (scan bed)
 Most common type of scanner.
 Functioning similarly to a copy machine, the device then scans the document using
light or an image sensor. A flatbed scanner is capable of converting paper documents
or photos into a digital form
 World top flatbed scanners Brand name: Like-
a. Epson b. Canon c. HP d. Plustek e. Xerox f. Fujitsu g. Viisan; etc.

7. Sheetfed scanners:
 More portable than a flatbed Scanner.
 Used to scan papers and photos
 The papers moves through the scanner
 Usally smaller then flatbed and portabel
 Sheetfed scanners hold small to large stacks, 20 to 500 sheets, of paper to digitize
dozens of times faster than a flatbed scanner
 World top Sheetfeb scanners Brand name: Like-
a. Brother b. Cannon c. Kodak d. Epson e. Fujitsu f. HP g. Raven; etc.

8.  Handheld scanners:
 Smaller than the previous two scanners.
 The user must move the scanner across the documents.
 Image quality usually lower.
 Scanners work by shining light at an image, document, or object. In simple terms, the
reflected light is then directed onto photosensitive technology via mirrors and lenses,
then converted into electronic data that is used to form a digital copy of the original.
 World top Handheld scanners Brand name: Like-
a. Symcode Barcode b. Tera Barcode c. NADAMOO Barcode
d. WoneNice Barcode e. NETUM Barcode f. Eyoyo Barcode
g. Honeywell; etc.

9.  Drum Scanners:
 Used by the publishing industry.
 Document is placed on a glass cylinder.
 Generates very high quality scans.
 Drum scanning is the finest quality, highest resolution method available to scan your
transparencies and negative film.
 It captures the image with analog light, producing the most detail
possible in each color channel and then converts it to a digital file
 World top Drum scanners Brand name: Like-
a. Heidelberg Tango b. Aztek HiResolve c. Howtek HiResolve
e. LinoType-Hell
f. Heidelberg g. Fuji; etc.

10. Using Scanner
 Most flatbed scanners are connected to the computer via the universal Serial Bus
(USB)
 A software program driver is used by the computer to communicate with scanners.
 An image eiditing program can then be used to mainpulate the scanned image.
 The scanners manufacturer will usually provide a stand-alone application for
scanning image.
 We can scan iamge and save them using their application.

11. Scanning Formats
 Depending on your scanning software, you may have different options of file formats
in which to save your scanned image or documents.
 images may be saved as jpg, bmp, tif or png
 Documents may be saved as pdf or any of the image formats.
A. bmp: the bmp file format somtimes called bitamp file format, is an image file format
used to store bitmap digital images.
1. bmp is very simple bitmap format used by miicrosoft by Microsoft. it doesn’t support
any photo specific features and most importanlly it doesn’t support color managment.
B. Tif: Tag Image File Format, abbreviated TIFF or TIF, is an image file format for storing
raster graphics images, popular among graphic artists. Tif image are considred losless
meaning when compress they do not lose any of the data that renders the image
allowing the image to maintain its resoulation.

12. Scanning Formats
C. JPG: JPG format contains important image details. This format is the most popular
image format for sharing photos and other images on the internet and between Mobile
and PC users. The small file size of JPG images allows storing of thousands of images in
small memory space.
D. PNG: The PNG file format is widely used on websites to display high-quality digital
images. Created to exceed the performance of GIF files, PNGs offer not just lossless
compression, but also a much broader and brighter color palette
E. PDF: PDF, or Portable Document Format, is an open file format used for exchanging
electronic documents. Documents, forms, images, and web pages encoded in PDF can
be correctly displayed on any device, including smartphones and tablets.

13. After Scanning
Essentially, this process captures the exact size and shape of a physical object. Therefore,
making a real-world object digital. From there, you can manipulate this data in
hundreds of ways to design, create, print, or even animate your digital asset. The
process of 3D scanning is very precise.
After scanning we can modify image in a graphic editing programming , like that : a.
crop b. Brightness c. Contrust

14.  Applications Programming Interface:
A paint application such as GIMP or Adobe Photoshop must communicate with the scanner. There are many
different scanners, and many of those scanners use different protocols. In order to simplify applications
programming, some Applications programming interfaces ("API") were developed. The API presents a uniform
interface to the scanner. This means that the application does not need to know the specific details of the
scanner in order to access it directly. For example, Adobe Photoshop supports the TWAIN standard; therefore in
theory Photoshop can acquire an image from any scanner that has a TWAIN driver.
In practice, there are often problems with an application communicating with a scanner. Either the application
or the scanner manufacturer (or both) may have faults in their implementation of the API.
Typically, the API is implemented as a dynamically linked library. Each scanner manufacturer provides software
that translates the API procedure calls into primitive commands that are issued to a hardware controller (such
as the SCSI, USB, or FireWire controller). The manufacturer's part of the API is commonly called a device driver,
but that designation is not strictly accurate: the API does not run in kernel mode and does not directly access
the device. Rather the scanner API library translates application requests into hardware requests.
Common scanner software API interfaces:
SANE (Scanner Access Now Easy) is a free/open-source API for accessing scanners. Originally developed for
Unix and Linux operating systems, it has been ported to OS/2, Mac OS X, and Microsoft Windows. Unlike
TWAIN, SANE does not handle the user interface. This allows batch scans and transparent network access
without any special support from the device driver.

15. Conclusion:
 TWAIN is used by most scanners. Originally used for low-end and home-use equipment, it is now widely used
for large-volume scanning.
 An image scanner—often abbreviated to just scanner—is a device that optically scans images, printed text,
handwriting or an object and converts it to a digital image. Commonly used in offices are variations of the
desktop flatbed scanner where the document is placed on a glass window for scanning. Hand-held scanners,
where the device is moved by hand, have evolved from text scanning "wands" to 3D scanners used for
industrial design, reverse engineering, test and measurement, orthotics, gaming and other applications.
Mechanically driven scanners that move the document are typically used for large-format documents, where a
flatbed design would be impractical.
 Modern scanners typically use a charge-coupled device (CCD) or a contact image sensor (CIS) as the image
sensor, whereas drum scanners, developed earlier and still used for the highest possible image quality, use a
photomultiplier tube (PMT) as the image sensor. A rotary scanner, used for high-speed document scanning, is
a type of drum scanner that uses a CCD array instead of a photomultiplier. Non-contact planetary scanners
essentially photograph delicate books and documents. All these scanners produce two-dimensional images of
subjects that are usually flat, but sometimes solid; 3D scanners produce information on the three-dimensional
structure of solid objects.

16. Conclusion:
 Digital cameras can be used for the same purposes as dedicated scanners. When compared to a true scanner,
a camera image is subject to a degree of distortion, reflections, shadows, low contrast, and blur due to camera
camera shake (reduced in cameras with image stabilization). Resolution is sufficient for less demanding
applications. Digital cameras offer advantages of speed, portability and non-contact digitizing of thick
documents without damaging the book spine. In 2010 scanning technologies were combining 3D scanners
with digital cameras to create full-color, photo-realistic 3D models of objects.
 Scans are usually downloaded by a computer the unit is attached to. Some scanners are able to store scans on
standalone flash media (e.g. memory cards and USB sticks).[2]
 In the biomedical research area, detection devices for DNA microarrays are called scanners as well. These
scanners are high-resolution systems (up to 1 µm/ pixel), similar to microscopes. The detection is done via
CCD or a photomultiplier tubes.

17. Thanks to all