ANDROID - color detection using openCV - how to?

Question

my goal is to display a threshed image using the HSV color space in a way that only yellow objects will be shown. i use this code (based on a code given by the openCV 2.3.1 andr

Answer 1

Well as far as I see it you fetch the image frame in RGBA and save it under the name "mHSV"

capture.retrieve(mHSV, Highgui.CV_CAP_ANDROID_COLOR_FRAME_RGBA);

so you should there store it as mRgba

in the cvtColor you need to transform it to HSV via COLOR_RGBA2HSV. Assuming you have changed the names this would be:

Imgproc.cvtColor(mRgba, mRSV, Imgproc.COLOR_RGB2HSV, 0);

And I assume this repetition of the images comes from the "4" in you cvtColor function since your HSV picture will only have 3 channels. Put in a 0 there and it should be detected automatically...

I hope it helps...