翻转CIImage水平

Question

我试图用：

翻转我的CIImage Horizo​​ntal

image = [image imageByApplyingTransform:CGAffineTransformMakeScale(1, -1)];
image = [image imageByApplyingTransform:CGAffineTransformMakeTranslation(0, sourceExtent.size.height)];

但我总是将图像翻转为垂直

Answer 1

尝试这种方式：

image = [image imageByApplyingTransform:CGAffineTransformMakeScale(-1, 1)];
image = [image imageByApplyingTransform:CGAffineTransformMakeTranslation(0, sourceExtent.size.height)];

Answer 2

这将正确地水平翻转图像并保持适当的坐标。

在Obj-C中：

image = [image imageByApplyingCGOrientation: kCGImagePropertyOrientationUpMirrored];

在斯威夫特：

image = image.oriented(.upMirrored)

https://developer.apple.com/documentation/coreimage/ciimage/2919727-oriented

如果你想要的是以你可以在UIImage中使用它的方式来定位它，那么你想要在两个轴上翻转它。

image = image.oriented(.downMirrored)

Answer 3

亚历克斯几乎拥有它，但你也需要调整翻译：

image = [image imageByApplyingTransform:CGAffineTransformMakeScale(-1, 1)];
image = [image imageByApplyingTransform:CGAffineTransformMakeTranslation(sourceExtent.size.width, 0)];

Answer 4

这对我有用：

UIImage(ciImage: ciImage.oriented(.upMirrored).oriented(.left))