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Question by Abirami-Govindarajan · Jul 06, 2017 at 03:10 PM · imageopencvcrop

how to crop image using opencv

Is there an option to crop the image using OpencvUnity package.I can resize but not crop.Kindly help

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avatar image CDMcGwire · Jul 06, 2017 at 03:55 PM 0
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It's been a while since I've used OpenCV, but I would think you could just resize the matrix [$$anonymous$$atrix::resize()]. Or, if you don't want it anchored to a particular corner, copy the desired indices to a new matrix.

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Answer by SolomonG · Jul 06, 2017 at 04:38 PM

Shouldn't be too hard. The OpenCVUnity package is essentially bindings to the Java OpenCV library, so what works in the Java library should work in the Unity one.

 Rect rectCrop = new Rect(cropCenterX, cropCenterY, cropWidth, cropHeight);
 Mat croppedImage = new Mat(originalImage, rectCrop);

Let me know if that worked or not!

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avatar image Abirami-Govindarajan · Jul 07, 2017 at 04:05 PM 0
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@SolomonG Thanks. I worked. Yet my cropped image exceeds the scale factor(x:256,y:256,z:1) of Quad(3d game object in unity). $$anonymous$$y original image(Lena.jpg) size:512x512 and my cropped region size is 35x112. Why the cropped image seems to occupy the full region. alt text

7-7-2017-5-08-56-pm.png (291.4 kB)

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