what is CV_8UC3, SCALAR_BLACK);?

Question

Mat imgContours(imgThresh.size(), CV_8UC3, SCALAR_BLACK);
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what is the purpose of the underlined code and how it works?

They're `#define`'d constants. Use your IDE's "Go to definition" tool - or use OpenCV's documentation: — Dai, Jan 05 '20 at 23:07
@Dai now i know what CV_8UC3 mean but what does SCALAR_BLACK mean? — Quattron Tech, Jan 05 '20 at 23:11
I don't think `SCALAR_BLACK` is defined by OpenCV (it would be CV_-prefixed if it were) — kmdreko, Jan 05 '20 at 23:12
That parameter is for the initial fill value, so its probably a #define or constant for `cv::Scalar(0)` or something similar, you'll have to check the code that has this defined to know for sure — kmdreko, Jan 05 '20 at 23:14
@kmdreko Thnks for the help everyone. SCALAR_BLACK, Scalar is used to pass pixel values. — Quattron Tech, Jan 05 '20 at 23:17

score 1 · Accepted Answer · answered Jan 05 '20 at 23:30

1

Mat imgContours(imgThresh.size(), CV_8UC3, SCALAR_BLACK);

CV_8UC3 is an 8-bit unsigned integer matrix(2D)/image with 3 channels.

answered Jan 05 '20 at 23:30

1 Answers1