Posts tagged tesseract

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Improving Tesseract OCR results on the iOS platform

1
354 days
by in iOS

If you’ve found yourself using Tesseract on the iOS platform, and you’re scratching your head as to why the OCR results are so terribly incorrect, you might be interested in the following. Most of the tesseract iOS tutorials talk about compiling the libraries, but don’t really cover how to use it.

Theres always an app for that, but how do you understand how it works?

Are you using something like this to interface with the tesseract API?

char* text = tess->TesseractRect(imageData,(int)bytes_per_pixel,(int)bytes_per_line, 0, 0,(int) imageSize.height,(int) imageSize.width);

NSLog(@"Converted text: %@",[NSStringstringWithCString:text encoding:NSUTF8StringEncoding]);

I was using this to start with, and the results were terrible, if it was able to read anything it was mostly returning special characters or just utter nonsense.

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From Wikipedia : In geometry, the tesseract, also called an 8-cell or regular octachoron or cubic prism, is the four-dimensional analog of the cube.

Tesseract OCR on Android is easier if you Maven-ise it, works on Windows too…

3
356 days
by in Android, Maven

I’ve spent the past few months working on an android application that involves an element of OCR capability, its been quite a painful journey so this is my attempt to reflect on these experiences and hopefully help others who follow in my path.

From Wikipedia : In geometry, the tesseract, also called an 8-cell or regular octachoron or cubic prism, is the four-dimensional analog of the cube.

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