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 | 1 | initial version |
since grayscale images in opencv usually are CV_8U, you need to do this in 2 seperate steps:
// #1 load and convert to gray:
Mat img = imread("C:/OpenCV4_0_1/sources/samples/data/lena.jpg");
Mat gray;
cvtColor(img, gray, COLOR_BGR2GRAY); // BGR, not RGB !
// #2 convert to 16U:
unsigned short i[48400];
Mat gimg(220, 220, CV_16UC1, i);
// but be careful, your gimg is only valid, as long as the i array stays in scope !
gray.convertTo(gimg, CV_16UC1, 255); // also upscale to [0..0xffff]
| | 2 | No.2 Revision |
since grayscale images in opencv usually are CV_8U, you need to do this in 2 seperate steps:
// #1 load and convert to gray:
Mat img = imread("C:/OpenCV4_0_1/sources/samples/data/lena.jpg");
imread("C:/OpenCV4_0_1/sources/samples/data/lena.jpg"); // CV_8UC3
Mat gray;
cvtColor(img, gray, COLOR_BGR2GRAY); // BGR, not RGB !
// #2 convert to 16U:
unsigned short i[48400];
Mat gimg(220, 220, CV_16UC1, i);
// but be careful, your gimg is only valid, as long as the i array stays in scope !
gray.convertTo(gimg, CV_16UC1, 255); // also upscale to [0..0xffff]