我正在尝试为我的程序(使网络摄像头流动)创建一个过滤器,这会使帧水平翻转,从而使网络摄像头像镜子一样工作。水平翻转一个帧在Objective-C
但是,它编译并运行时,过滤器似乎没有任何影响。
下面是代码:
CIImage *resultImage = image;
CIFilter *flipFilter = [CIFilter filterWithName:@"CIAffineTransform"];
[flipFilter setValue:resultImage forKey:@"inputTransform"];
NSAffineTransform* flipTransform = [NSAffineTransform transform];
[flipTransform scaleXBy:-1.0 yBy:1.0]; //horizontal flip
[flipFilter setValue:flipTransform forKey:@"inputTransform"];
resultImage = [flipFilter valueForKey:@"outputImage"];
奇怪的是,其他过滤器已工作。例如:
CIFilter * ciEffectFilter = [CIFilter filterWithName:@"CIGloom"];
[ciEffectFilter setDefaults];
CIImage *resultImage = image;
[ciEffectFilter setValue: resultImage forKey:@"inputImage"];
[ciEffectFilter setValue:[NSNumber numberWithFloat: 0.75]
forKey:@"inputIntensity"];
[ciEffectFilter setValue:[NSNumber numberWithFloat: 20]
forKey:@"inputRadius"];
resultImage = [ciEffectFilter valueForKey:@"outputImage"];
CIFilter *ciCropFilter = [CIFilter filterWithName:@"CICrop"];
[ciCropFilter setDefaults];
[ciCropFilter setValue: resultImage forKey:@"inputImage"];
[ciCropFilter setValue: [CIVector vectorWithX:50 Y:50 Z:300 W:
300] forKey:@"inputRectangle"];
resultImage = [ciCropFilter valueForKey:@"outputImage"];
这与NSAffineTransform有关吗?我环顾四周,但我还没有找到任何答案。 感谢堆!
太棒了。这是诀窍!感谢堆! :D – Moonlight293 2011-01-24 02:59:03