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Optical Character Recognition (OCR) involves the conversion of scanned images of printed text into machine-readable text. It is heavily used in industry for applications like editing, scanning, searching, and compact storage. The document discusses developing an OCR system using machine learning, artificial intelligence, and neural networks to recognize characters despite variations in image quality, orientation, and language. It outlines the technologies, current progress implementing linear and logistic regression models, and future plans for character segmentation and feature extraction.
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- 1. OPTICAL CHARACTER RECOGNITION Divyanshu Sagar Ahmed Zaid Faizee Vidyut Singhania
- 2. INTRO 1. Ingenious piece of software. 2. Involves the mechanical/electronic conversion of scanned images of typewritten/printed text into machine- encoded/computer-readable text. • 3. Heavily used in the industry.
- 3. INTRO ii • Common method of digitizing printed texts • Subtle software which is as highly overlooked as it is simple. • Numerous applications and uses – editing, scanning, searching, comparison, compact storage and many more! • OCR is a field of research in pattern recognition, artificial intelligence and computer vision.
- 4. Problem Statement Ever since Charles Babbage invented the computer back in the early 19th century, Computer machines have held man's imagination for numerous reasons - the primary being what all is this collection of nuts, bolts and wires capable of doing. Character Recognition is one such concept which has beheld mankind’s attention. There can be no greater testimony to the same than the fact that people were already working on this idea - a few decades before John McCarthy even coined the term "Artificial Intelligence". Today, especially, Character Recognition plays a very important part of our daily lives as they are incorporated so subtly that we even forget their presence. Some examples are their implementation in Microsoft Word, Adobe Acrobat and even Pen computing. Optical Character Recognition (OCR) is the mechanical or electronic conversion of scanned or photoed images of typewritten or printed text into machine-encoded/computer- readable text. This text can then be used in numerous ways - ranging from assisting the visually impaired (text-to-speech), extracting information from the image, pen computing and so on. Optical Character Recognition (OCR) is a result of cross-linking various avenues of technology like Machine Learning, Artificial Intelligence and Neural Networks. We propose to develop a system based on mathematical algorithms and principles which involve all the aforementioned technologies. That being said, Optical Character Recognition (OCR) also depends on a few other factors : the quality of the image taken, the orientation of and the dialect being used. Our paper aims to address the aforementioned problems, which enables its application in numerous new fields as well as the obvious & established aspects of our surroundings.
- 5. Tech Jargon - I • Pre-processing Used to improve the successful recognition of the image (include De- skew, Layout analysis, Despeckle) • Character/glyph recognition • Post-processing • Application specific optimization Tweaking the system to better deal with specific or different inputs.
- 6. Tech Jargon - II Segmentation Includes two important phases: 1) Obtaining training samples 2) Recognizing new images after training Feature Extraction Feature of the character are extracted and hence are compared with the glyph Classification After the extraction, neural network is trained using the training data
- 7. Our Current Progress • We started with the Neural Networks / Machine Learning aspect of the project. • We have implemented Univariate / Multivariate Linear/Regularized Linear Regression, Gradient Descent for Multiple Variables and Logistic/ Regularized Logistic Regression. • Currently, we are studying & working on the implementation of Neural Nets using Forward Propogation. • We plan on tackling character segmentation and feature extraction next.
- 8. Technology to be used • We are using the following technology platforms : – GNU Octave To develop and test the OCR software. – 5MP HD camera (720p @ 30fps) To take images for detection
- 9. Timeline
- 10. Literature Review • Microsoft One Note • Adobe PDF scanner • HP scanner