Package image defines the Image interface:

package imagetype Image interface {    ColorModel() color.Model    Bounds() Rectangle    At(x, y int) color.Color}

(See the documentation for all the details.)

Also, color.Color and color.Model are interfaces, but we‘ll ignore that by using the predefined implementations color.RGBA and color.RGBAModel. These interfaces and types are specified by the image/color package

package mainimport (    "fmt"    "image")func main() {    m := image.NewRGBA(image.Rect(0, 0, 100, 100))    fmt.Println(m.Bounds())    fmt.Println(m.At(0, 0).RGBA())}

A Tour of Go Images