Converting image to Black & White image on iPhone SDK issues.
- by KfirS
Hello,
I've used a familiar code to convert image to Black & White which I've founded on several forums.
The code is:
CGColorSpaceRef colorSapce = CGColorSpaceCreateDeviceGray();
CGContextRef context = CGBitmapContextCreate(nil, originalImage.size.width, originalImage.size.height, 8, originalImage.size.width, colorSapce, kCGImageAlphaNone);
CGContextSetInterpolationQuality(context, kCGInterpolationHigh);
CGContextSetShouldAntialias(context, NO);
CGContextDrawImage(context, CGRectMake(0, 0, originalImage.size.width, originalImage.size.height), [originalImage CGImage]);
CGImageRef bwImage = CGBitmapContextCreateImage(context);
CGContextRelease(context);
CGColorSpaceRelease(colorSapce);
UIImage *resultImage = [UIImage imageWithCGImage:bwImage]; // This is result B/W image.
CGImageRelease(bwImage);
return resultImage;
When I'm using this code with on Horizontal image it's work fine,
but when I'm trying a to use this code on Vertical image, the result is
disproportionate image and rotate 90 degree left.
Can anyone know what could be the problem?
Thanks,
Kfir.
