canvas-filter

canvas滤镜函数。 函数参考了https://blog.csdn.net/u010081689/article/details/49071371。

滤镜方法

灰度滤镜：canvasFilter.grayScale

• imageData { ImageData }
• options { object }
  • r { number }
  • g { number }
  • b { number }

黑白滤镜：canvasFilter.blackAndWhite

• imageData { ImageData }
• options { object }
  • r { number }
  • g { number }
  • b { number }
  • criticalPoint { number }

反色滤镜：canvasFilter.inverted

• imageData { ImageData }
• options { object }
  • adjustmentR { number }
  • adjustmentG { number }
  • adjustmentB { number }

模糊滤镜：canvasFilter.blur

• imageData { ImageData }
• options { object }
  • coefficient { number }

马赛克：canvasFilter.mosaic

• imageData { ImageData }
• options { object }
  • size { number }