Merge pull request #7122 from haikusw:UIImageAlphaToMatFix

8 years ago · 5903c7257e
parent bf4c5bef7f ca318e7099
commit 5903c7257e
1 changed files with 4 additions and 0 deletions
--- a/modules/imgcodecs/src/ios_conversions.mm
+++ b/modules/imgcodecs/src/ios_conversions.mm
@ -106,6 +106,8 @@ void UIImageToMat(const UIImage* image,
        bitmapInfo = kCGImageAlphaNone;
        if (!alphaExist)
            bitmapInfo = kCGImageAlphaNone;
+        else
+            m = cv::Scalar(0);
        contextRef = CGBitmapContextCreate(m.data, m.cols, m.rows, 8,
                                           m.step[0], colorSpace,
                                           bitmapInfo);
@ -116,6 +118,8 @@ void UIImageToMat(const UIImage* image,
        if (!alphaExist)
            bitmapInfo = kCGImageAlphaNoneSkipLast |
                                kCGBitmapByteOrderDefault;
+        else
+            m = cv::Scalar(0);
        contextRef = CGBitmapContextCreate(m.data, m.cols, m.rows, 8,
                                           m.step[0], colorSpace,
                                           bitmapInfo);