Verson 2.5.7 [Common]Added FeatureMatchingExample. [WebGL]Added a plugin file with threads and simd enabled for the WebGL platform. This update removes support for the WebGL platform in Unity 2021.1 and below. (Select MenuItem[Tools/OpenCV for Unity/Open Setup Tools/WebGL Settings])

Version 2.1.1[Common]Fixed OpenCVForUnityMenuItem.cs.(No valid name for platform: 11 Error)[Common]Added Utils.textureToTexture2D() method.[Common]Added Mat class operators. [Common] Added PolygonFilterSample.

Version 2.1.7[Common]Improved Utils.getFilePath() and Utils.getFilePathAsync().[Common]Improved WebCamTextureAsyncDetectFaceExample.cs.[Common] Fixed the const value of Calib3d class.