如何模糊UIImage排除特定点。

Question

In GPUImageGaussianSelectiveBlurFilter how to set the point of non image blur ? i tried setting the point excludeCirclePoint but everything gets blur. I want to implement touches gesture and the touched point remains good while the other image gets blur.

Answer 1

You have to assign CGPoint to filter's excludeCirclePoint property where CGPointMake(0, 0) is the top-left corner of the image and CGPointMake(1, 1) is the bottom-right corner.

Something like:

GPUImageGaussianSelectiveBlurFilter *filter = [[GPUImageGaussianSelectiveBlurFilter alloc] init];
filter.excludeCirclePoint = CGPointMake(0.5, 0.5); // center