期望的行为：
在Photoshop中,当我运行高斯模糊滤镜时,由于边缘模糊,图像层会变大.

观察到的行为：使用GPUImage,我可以成功模糊我的UIImages.但是,新图像在原始边界处被裁剪,一直留下硬边.

设置UIImageView.layer.masksToBounds = NO;没有帮助,因为图像被裁剪而不是视图.

我还尝试在模糊之前将UIImage置于较大的清晰图像上,然后调整大小.这也没有帮助.

有没有办法实现这种“Photoshop风格”模糊？

更新工作解决方案感谢Brad Larson：

UIImage sourceImage = ...
GPUImagePicture *imageSource = [[GPUImagePicture alloc] initWithImage:sourceImage];
GPUImageTransformFilter *transformFilter = [GPUImageTransformFilter new];
GPUImageFastBlurFilter *blurFilter = [GPUImageFastBlurFilter new];

//Force processing at scale factor 1.4 and affine scale with scale factor 1 / 1.4 = 0.7
[transformFilter forceProcessingAtSize:CGSizeMake(SOURCE_WIDTH * 1.4,SOURCE_WIDTH * 1.4)];
[transformFilter setAffineTransform:CGAffineTransformMakeScale(0.7,0.7)];

//Setup desired blur filter        
[blurFilter setBlurSize:3.0f];
[blurFilter setBlurPasses:20];

//Chain Image->Transform->Blur->Output        
[imageSource addTarget:transformFilter];
[transformFilter addTarget:blurFilter];
[imageSource processImage];

UIImage *blurredImage = [blurFilter imageFromCurrentlyProcessedOutputWithOrientation:UIImageOrientationUp];