PNG libraries for Go

• image/png in the standard library decodes and encodes PNG, including 16-bit and palette images. It doesn’t read or write text chunks.
• imaging adds resizing, cropping, rotation and filters on top of the standard image package and saves to PNG, JPEG, GIF, TIFF and BMP.

• image/png Go's standard library package image/png decodes and encodes PNG images. How to read and write PNG in Go, get the size without decoding, set compression level.
• imaging imaging is a Go package for resizing, cropping, rotating and filtering images. How to open a PNG, make thumbnails, set PNG compression.