lena

README

go-lena

Get classic image processing example image, Lena.

Installation

for production

go get github.com/koyachi/go-lena

Default bindata.go contains lena image as code, so the program that imports go-lena is easy to depoly. But compile and image reading time is slow.

for debug

go get github.com/koyachi/go-lena
cd $GOPATH/src/github.com/koyachi/go-lena
make bindata.go.debug

bindata.go for debug not contains lena image as go code, it reads tiff file from build environment's directory layout.

• Pros: a fast compile and image reading time.
• Cons: a failure to read lena image. ($GOPATH)

Example

package main

import (
	"github.com/koyachi/go-lena"
	"fmt"
	"image/jpeg"
	"log"
	"os"
	"path/filepath"
)

func main() {
	fmt.Printf("processing...\n")
	img, err := lena.Image()
	if err != nil {
		log.Fatal(err)
	}

	path, err := filepath.Abs("result.jpg")
	if err != nil {
		log.Fatal(err)
	}
	file, err := os.Create(path)
	if err != nil {
		log.Fatal(err)
	}
	err = jpeg.Encode(file, img, nil)
	if err != nil {
		log.Fatal(err)
	}
}

Links

• http://en.wikipedia.org/wiki/Lenna
• http://docs.scipy.org/doc/scipy-0.14.0/reference/generated/scipy.misc.lena.html
• https://github.com/jteeuwen/go-bindata

Documentation

Index

• func Asset(name string) ([]byte, error)
• func AssetDir(name string) ([]string, error)
• func AssetNames() []string
• func Image() (img image.Image, err error)

Functions

func Asset

func Asset(name string) ([]byte, error)

Asset loads and returns the asset for the given name. It returns an error if the asset could not be found or could not be loaded.

func AssetDir

func AssetDir(name string) ([]string, error)

AssetDir returns the file names below a certain directory embedded in the file by go-bindata. For example if you run go-bindata on data/... and data contains the following hierarchy:

data/
  foo.txt
  img/
    a.png
    b.png

then AssetDir("data") would return []string{"foo.txt", "img"} AssetDir("data/img") would return []string{"a.png", "b.png"} AssetDir("foo.txt") and AssetDir("notexist") would return an error AssetDir("") will return []string{"data"}.

func AssetNames

func AssetNames() []string

AssetNames returns the names of the assets.

func Image

func Image() (img image.Image, err error)