OpenCV for iOS port to Android

Question

I have already developed an application in iOS which uses this algorithm to detect a sheet of paper and I am translating the algorithm to an Android port.

How should I translate this one into Java?

mixChannels(&blurred, 1, &gray0, 1, ch, 1);

Where blurred and gray0 are cv::Mat.

score 2 · Answer 1 · answered Aug 29 '12 at 19:38

2

Use cvMixChannels function. Here's description of parameters.

answered Aug 29 '12 at 19:38

ArtemStorozhuk

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@vasile fernandospr asked to translate one function, not whole code. – ArtemStorozhuk Aug 30 '12 at 07:26
Sorry but if you have the whole code to detect a paper sheet translated that would be great! – fernandospr Aug 30 '12 at 20:33
@fernandospr No, I don't have it. – ArtemStorozhuk Aug 30 '12 at 20:38
1

@astor Using cvMixChannels is not a valid response. It requires to use another wrapper which I would not like to use. Core.mixChannels requires List as parameters, instead of just a Mat in the cpp version, please can you explain the difference? – fernandospr Sep 14 '12 at 15:42

Paito · Answer 2 · 2013-09-05T16:55:51.553

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This is how you would do it:

MatOfInt fromto = new MatOfInt(ch);
List<Mat> blurredlist = new ArrayList<Mat>();
List<Mat> graylist = new ArrayList<Mat>();
blurredlist.add(0, blurred);
graylist.add(0, gray0);
Core.mixChannels(blurredlist, graylist, fromto);

Look at this implementation for more examples: https://code.google.com/p/scope-ocr/

edited Sep 05 '13 at 16:55

answered Sep 05 '13 at 01:56

Paito

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OpenCV for iOS port to Android

2 Answers2