Optical Character Recognition is mechanical or electronic translation of images of handwritten, typewritten or printed text into text data (a sequence of codes used to represent characters in the computer).

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Generic text recognition

OCR is a quite an old subject in Image Processing & Vision. However, the most literature that I had come across 1, 2, 3 shows various matured techniques which I am sure will give some good results ...
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How to OCR topographic maps

I have old topographic maps scanned-pdf. I tried to OCR (text recognition) in Acrobat XI 11 but this went in vain.I need this pdf to be text-searchable (not mere image). To do this i tried text ...
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25 views

Difference Between Least Square Error Recognition, Logistic Regression, and a Certain Nearest Neighbor Neural Network

Least Square Error Recognition from JavaOCR finds the least mean square error from a training image pixel by pixel. Logistic regression from this site, on the other hand, seeks to minimize the error ...
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58 views

Sharpen defocused image

Using OCR, I want to extract text from product packages using Google Glass. However, because of the fixed focus of the camera the package pictures are blurred. Is there a way to sharpen the image? ...
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51 views

Compare feature vectors of an image in matlab

I am working on OCR. I have extracted features of 26 alphabets and I want to compare them with an experimental character feature. I have tried using Euclidean distance and correlation functions, but I ...
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71 views

What images are better when training tesseract-ocr

I have a project that requires different language support and optical character recognition. Like many others, I just can't figure out how to train tesseract. Incredibly low amount of documentation, ...
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136 views

What preprocessing technique can help me to filter the background text noises using matlab…the image is shown below?

Can anyone help me to improve the degradation of the following image....i am working on OCR system in Amharic language and what is the best image filtering technique that can help me to separate ...
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70 views

Small Font Arabic OCR character segmentation

I'm working on an Arabic OCR , it already works on font sizes 20, 30, 40 and 60 pixel height, currently I am trying to make it work on 10 pixel height, as I mentioned here before I tried first to ...
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96 views

Is this image good enough for OCR?

Hello I'm trying to ocr on a special image. I've done adaptive threshold , polartocartesian transformation. this is my original image this is adaptive threshold this is polartocartesian ...
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70 views

Re sizing and thresholding small font scanned Arabic words

I am working on an arabic OCR for printed scanned documents ... Some of the scanned documents may written with font size of height 8 which is quite small ... I want to resize the height to 60 pixels ...
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148 views

Feature Detection on a Circular Metal Surface for Character Recognition

Hello I'm trying to recognize characters on the circular metal surface. Without any preprocessing I could match cropped features with original image. I've actually cropped 2 characters together to ...
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83 views

Line tracing folowing a path of an almost connected components

say we have a binary image like the one in below i would like to extract each black line, even if it's not almost connected i have marked here in red, example of lines that correspond to those to be ...
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257 views

Suggested Preprocessing methods for OCR on Circular Images

Hello this is my sample image I am going to do real time character detection on images like that. I've tried SURF, SIFT, MSER and template matching on original image without any preprocessing. I can ...
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170 views

Using neural networks for rotation invariant OCR

I have video with text which can be rotated in any direction. If I trained a neural network on images of each letter at all possible degrees of rotation, would it be possible to classify the ...
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46 views

what are best features [closed]

I am doing OCR for Kannada and English. What are the best features in image? Please also tell me some tools to perform OCR before implementing it as code (like Rapiedminer for machine learning).
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4k views

Licence plate detection with different backgrounds

I just studied the Algorithm of ANPR (Automatic Number Plate Recognition) from the chp 5 of book Packtpub.Mastering.OpenCV.with.Practical.Computer.Vision.Projects in which they detect the vehicle ...
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75 views

Match (OCR?) a digital image of a product label to similar

Excuse my ignorance... Given a digital image of a label I'd like to Requirement: Match it to the closest pre-existing image in a datastore Optional: OCR it, if possible (only necessary if step 1 ...
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212 views

Smoothing “font characters” outlines in bitmap image

Adobe Acrobat has this as a feature called ClearScan. While doing OCR it allows image enhancement, by smoothing irregularities on font outlines. For example, this source: turns to this: Are ...
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143 views

Recognizing hand-written archaeological signs

I have 75 images of handwritten signs from which I extracted 7 Hu moments and solidity features. How can I find similarities among them to train a classifier and predict the value? I thought SVM was a ...
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750 views

What is the algorithm behind OCR?

I'm curious about the algorithm and basic principles behind Optical Character Recognition. Can anyone explain: The most basic OCR algorithm that can be fairly easily implemented from scratch? Or ...
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1k views

Nutrition facts label OCR

My team is working on a program that can read nutrition facts labels using OCR, much like NutriScanner (though by its reviews it doesn't seem like it works particularly well). I've seen other ...
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363 views

Filtering kinda “half-toned” image for OCR processing

I have a scanned PDF material to which I want to add hidden text layer, so I could index the document. I used ghostscript black and white tiff output device (tiffg4) to extract pages as tiff images, ...
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5k views

Text recognition for Android app

I´d like to use some OCR algorithm (Image to Text) into an Android app (Java). I have previously used several algorithms but for a PC (Matlab) app. Which library or algorithm should I use? ...