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Update documentation of imwrite()

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This commit is contained in:
Suleyman TURKMEN
2020-07-01 23:50:09 +03:00
committed by sturkmen72
parent 5a7045181a
commit 2566d13100
2 changed files with 17 additions and 7 deletions
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17
samples/cpp/tutorial_code/snippets/imgcodecs_imwrite.cpp
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@@ -3,7 +3,7 @@
using namespace cv;
using namespace std;
static void createAlphaMat(Mat &mat)
static void paintAlphaMat(Mat &mat)
{
CV_Assert(mat.channels() == 4);
for (int i = 0; i < mat.rows; ++i)
@@ -21,9 +21,9 @@ static void createAlphaMat(Mat &mat)
int main()
{
// Create mat with alpha channel
Mat mat(480, 640, CV_8UC4);
createAlphaMat(mat);
Mat mat(480, 640, CV_8UC4); // Create a matrix with alpha channel
paintAlphaMat(mat);
vector<int> compression_params;
compression_params.push_back(IMWRITE_PNG_COMPRESSION);
compression_params.push_back(9);
@@ -37,9 +37,18 @@ int main()
{
fprintf(stderr, "Exception converting image to PNG format: %s\n", ex.what());
}
if (result)
printf("Saved PNG file with alpha data.\n");
else
printf("ERROR: Can't save PNG file.\n");
vector<Mat> imgs;
imgs.push_back(mat);
imgs.push_back(~mat);
imgs.push_back(mat(Rect(0, 0, mat.cols / 2, mat.rows / 2)));
imwrite("test.tiff", imgs);
printf("Multiple files saved in test.tiff\n");
return result ? 0 : 1;
}