CIFilter“CIExposureAdjust”中使用的键名称“inputEV”的含义是什么？
例如:
CIFilter *exposureFilter = [CIFilter filterWithName:@"CIExposureAdjust"];
[exposureFilter setValue:outputImage forKey:kCIInputImageKey];
[exposureFilter setValue:[NSNumber numberWithFloat:5] forKey:@"inputEV"];
CIImage *outputImage = [exposureFilter valueForKey:kCIOutputImageKey];
最佳答案
这是曝光值，根据文档:
This filter multiplies the color values, as follows, to simulate exposure change by the specified F-stops:
s.rgb * pow(2.0, ev)
关于ios - 'inputEV'的含义，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/38171006/