ios - GPUImageGaussianSelectiveBlurFilter选择区域问题

Question

我使用了 GPUImageGaussianSelectiveBlurFilter

    imagePic = [[GPUImagePicture alloc] initWithImage:captureImage];// given a input in gpuimagepicture for process a image
filter = [[GPUImageGaussianSelectiveBlurFilter alloc] init];
[imagePic addTarget:filter];// add a filter for image

// create  a view for set a image in that view
imageViewGpu=[[GPUImageView alloc] initWithFrame:CGRectMake((self.view.frame.size.width-OutputImageView.frame.size.width)/2.0, (biManager.displayImageHeight-OutputImageView.frame.size.height)/2.0, OutputImageView.frame.size.width, OutputImageView.frame.size.height)];
imageViewGpu.userInteractionEnabled = YES;

imageViewGpu.frame=OutputImageView.frame;
imageViewGpu.multipleTouchEnabled= YES;
imageViewGpu.backgroundColor = [UIColor clearColor];
imageViewGpu.userInteractionEnabled = YES;
imageViewGpu.fillMode=kGPUImageFillModePreserveAspectRatio;
[self.view addSubview:imageViewGpu];
[(GPUImageGaussianSelectiveBlurFilter *) filter setExcludeCircleRadius:0.3f];

[(GPUImageGaussianSelectiveBlurFilter *) filter setExcludeCirclePoint:CGPointMake(0,0)];
[filter addTarget:imageViewGpu];
[filter prepareForImageCapture];
[imagePic processImage];// get a filter apply image

我的输出是

但是我需要这个输出

我认为这个滤镜非常适合方形图像。但它不能正确处理矩形图像。请帮助我。

Answer 1

将过滤器的 aspectRatio 属性设置为图像的纵横比。

filter.aspectRatio = imagePix.size.width/imagePix.size.height

如果这不起作用交换宽度/高度 :]