imutil

Documentation

Overview

Package imutil is an internal package which contains various utilities for loading, storing, and generating image files.

Index

• func Dump(path string, img image.Image) error
• func FromMat(m *mat.Dense) *image.Gray
• func FromMatNorm(m *mat.Dense) *image.Gray
• func Load(path string) (image.Image, error)
• func Rand(seed int64, w, h int) *image.Gray
• func Sub(img image.Image, r image.Rectangle) (image.Image, error)
• func ToGray(img image.Image) *image.Gray
• func ToMat(img *image.Gray) *mat.Dense

Functions

func Dump

func Dump(path string, img image.Image) error

Dump dumps an image to a file.

func FromMat

func FromMat(m *mat.Dense) *image.Gray

FromMat converts a float [0, 1] matrix to a grayscale image.

func FromMatNorm

func FromMatNorm(m *mat.Dense) *image.Gray

FromMatNorm normalizes a float matrix linearly to [0, 1] and then calls FromMat() on the result.

func Load

func Load(path string) (image.Image, error)

Load loads an image from a file path.

func Rand

func Rand(seed int64, w, h int) *image.Gray

Rand generates a random grayscale image.

func Sub

func Sub(img image.Image, r image.Rectangle) (image.Image, error)

Sub selects a subregion from an image and returns a new image. Shares memory.

func ToGray

func ToGray(img image.Image) *image.Gray

ToGray converts an image to a grayscale image.

func ToMat

func ToMat(img *image.Gray) *mat.Dense

ToMat converts a grayscale image to a float matrix with values in [0, 1].