diff --git a/colorcrop.go b/colorcrop.go
index 88595a1..a50d5fc 100644
--- a/colorcrop.go
+++ b/colorcrop.go
@@ -1,4 +1,5 @@
-// Go library for cropping images by removing borders with specified color.
+// Package colorcrop is a Go library for cropping images by removing borders
+// with specified color.
 package colorcrop
 
 import (
@@ -11,7 +12,7 @@ func Crop(img image.Image, color color.Color, thresold float64) image.Image {
 	return CropWithComparator(img, color, thresold, CmpRGBComponentsDiff)
 }
 
-// Crop returns cropped image with specified comparator.
+// CropWithComparator returns cropped image with specified comparator.
 func CropWithComparator(img image.Image, color color.Color, thresold float64, comparator comparator) image.Image {
 	return img.(interface {
 		SubImage(r image.Rectangle) image.Image
diff --git a/comparators.go b/comparators.go
index f052973..db71c8e 100644
--- a/comparators.go
+++ b/comparators.go
@@ -9,7 +9,7 @@ import (
 // range 0.0..1.0.
 type comparator func(color.Color, color.Color) float64
 
-// CmpColorDifference returns difference of two colors
+// CmpSquareRGBComponentsDiff returns difference of two colors
 func CmpSquareRGBComponentsDiff(color1 color.Color, color2 color.Color) float64 {
 	const maxDiff = 113509.94967402637 // Difference between black and white colors
 
@@ -20,7 +20,7 @@ func CmpSquareRGBComponentsDiff(color1 color.Color, color2 color.Color) float64
 		math.Pow(float64(b2)-float64(b1), 2.0)) / maxDiff
 }
 
-// CmpColorDifference returns difference of two colors.
+// CmpRGBComponentsDiff returns difference of two colors.
 func CmpRGBComponentsDiff(color1 color.Color, color2 color.Color) float64 {
 	const maxDiff = 765 // Difference between black and white colors