cocoa-touch - <错误> : CGImageCreate: invalid image bits/pixel: 8

Question

我将 opencv 与 Xcode 一起使用，我得到了从 IplImage 转换为 UIImage 的方法:

-(UIImage *)UIImageFromIplImage:(IplImage *)image {
NSLog(@"IplImage (%d, %d) %d bits by %d channels, %d bytes/row %s", image->width, image->height, image->depth, image->nChannels, image->widthStep, image->channelSeq);

CGColorSpaceRef colorSpace = CGColorSpaceCreateDeviceRGB();
NSData *data = [NSData dataWithBytes:image->imageData length:image->imageSize];
CGDataProviderRef provider = CGDataProviderCreateWithCFData((__bridge  CFDataRef)data);
CGImageRef imageRef = CGImageCreate(image->width, image->height,
                         image->depth, image->depth * image->nChannels, image->widthStep,
colorSpace, kCGImageAlphaPremultipliedLast|kCGBitmapByteOrderDefault,
provider, NULL, false, kCGRenderingIntentDefault);
UIImage *ret = [UIImage imageWithCGImage:imageRef scale:1.0 orientation:UIImageOrientationUp];
CGImageRelease(imageRef);
CGDataProviderRelease(provider);
CGColorSpaceRelease(colorSpace);
return ret;
}

问题是，当我将任何图像传递给此方法(png、jpg、tiff)时，会出现此错误: CGImageCreate: invalid image bits/pixel: 8，请帮我解决这个错误，谢谢。

Answer 1

如果你的图像是灰色的(不是 RGBA)，使用这个:

colorSpace = CGColorSpaceCreateDeviceGray();