Memory leak when calling setImage about tesseract-ocr-ios HOT 5 CLOSED

I was able to confirm this using the Instruments tool in Xcode. The following "pix_malloc" function seems to allocate 32KB every time "setImage" is called on the Tesseract object:

from tesseract-ocr-ios.

It's late so I might be wrong about this, but it looks like the imageThresholder->GetPixRect() call at https://github.com/gali8/Tesseract-OCR-iOS/blob/master/TesseractOCR%2FTesseract.mm#L218 should destroy the Pix result once it's done with it, according to the documentation here: http://fossies.org/dox/tesseract-ocr-3.02.02/classtesseract_1_1ImageThresholder.html#a0b855cc35144b84f150bf39d5342d7f1

In the next day or so I'll try saving a reference to the result of GetPixRect() (possibly in the existing, seemingly unused _pixels member field) and calling the Leptonica function pixDestroy() (https://tpgit.github.io/Leptonica/pix1_8c.html#a11c3800e3ec598556b1f4779a2079bbd) on any pixels that should be thrown away (e.g. between successive calls to setImage()). Or feel free to take a crack at it if you feel up to it.

from tesseract-ocr-ios.

I believe I've fixed the memory leak. I've added these commits to my existing pull request, but I don't know how active this repo's maintainers are, so in the meantime you can use my fork here: https://github.com/kevincon/Tesseract-OCR-iOS

If you're using CocoaPods, you can add this line to your Podfile to switch to using my fork:

pod 'TesseractOCRiOS', :git => 'https://github.com/kevincon/Tesseract-OCR-iOS.git', :branch => 'master'

from tesseract-ocr-ios.

Thanks Kevin!
All merged.

from tesseract-ocr-ios.

Thanks kevincon! This is tremendously helpful.

from tesseract-ocr-ios.