How to find and correct skew using leptonica library in android tesseract tool

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I am implementing android image processing. In that i have sample image,from that image i want to detect skew of image![my sample image have skew . i want to correct that result image should be unskew respect to number plate(number plate become in straight line after skew apply]. So i can send that area to tesseract OCR and return number plate number Note:solution should not be in OpencV

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nguyenq On

Leptonica has a slew of deskew functions. I'm not sure if the Android binding exposes them, though.