SmallImage使用智能有损压缩技术来减少PNG文件的文件大小。 通过选择性地减少图像中的颜色数量，需要较少的字节来存储数据。 效果几乎看不见，但文件大小差异很大！
Smart PNG and JPEG compression
Optimize your images with a perfect balance in quality and file size.
Uses smart lossy compression techniques to reduce the file size of your PNG files. By selectively decreasing the number of colors in the image, fewer bytes are required to store the data. The effect is nearly invisible but it makes a very large difference in file size!
Compatibility: OS X 10.10 or later, 64-bit processor
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