Java opencv inRange thresholding function makes my image into three different images?

Question

I am using java opencv and this is the line that I am executing.

Imgproc.cvtColor(originalImage, hsvImage, Imgproc.COLOR_BGR2HSV);
Core.inRange(hsvImage, low, high, thresholdImage);

low and high are some Scalar values(of size 3 each). So my original image as you can see is of 3 channels, but my thresholdImage has only one channel, why? As a result of this, when I try to display thresholdImage, I get three small images in my JFrame. How to fix this?

I think the question is quite complete. SO's policy needs questions that are specific and I think this question is quite specific and I tend to keep my questions as specific as possible without unnecessary information. Please refer to my answer as I think I have figured it out. If I am wrong, please do correct me. Thanks. — MikeJoe
– MikeJoe, Commented May 11, 2017 at 2:58

trashgod · Accepted Answer · 2017-05-11 09:18:16Z

2

It turns out that Core.inRange changes the second argument, which is a Mat, to a single channel image. So in order to get 3 channels, I needed to use Imgproc.cvtColor function to re-convert it back to 3 channels.

edited May 11, 2017 at 9:18

trashgod

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answered May 11, 2017 at 2:56

MikeJoe

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