golang 获取纯色底图中的核心图

package main

import (
    "bytes"
    "fmt"
    "github.com/disintegration/imaging"
    "github.com/george518/PPGo_ClipImg/coreImg"
    "image"
    "io/ioutil"
    "log"
    "os"
    "strings"
    "testing"
)

//判断目录是否存在
func IsDir(name string) bool {
    fi, err := os.Stat(name)
    if err != nil {
        fmt.Println("Error: ", err)
        return false
    }

    return fi.IsDir()
}

//创建多级目录
func CreateDir(name string) bool {
    if IsDir(name) {
        return true
    }

    if createDirImpl(name) {
        return true
    } else {
        return false
    }
}

func createDirImpl(name string) bool {
    err := os.MkdirAll(name, 0777)
    if err == nil {
        return true
    } else {
        return false
    }
}

func MakeDir(file string) string {
    path := strings.Split(file, "/")
    var newFilePath = ""
    for k, p := range path {
        if k != len(path)-1 {
            newFilePath += p + "/"
        }
    }
    newFilePath += "CoreImages/"
    CreateDir(newFilePath)
    return newFilePath + path[len(path)-1]
}


func TestImage(t *testing.T)  {
    path:="example/images/bags.jpg"
    //打开图片
    file, err := ioutil.ReadFile(path)
    if err != nil {
        log.Fatal(err)
    }
    bt := bytes.NewBuffer(file)
    m, _, err := image.Decode(bt)
    if err != nil {
        log.Fatal(err)
    }

    //截取核心图片
    x0, x1, y0, y1 := coreImg.CoreImg(m)


    //截取图片
    corePic := imaging.Crop(m, image.Rect(x0, y0, x1, y1))

    //创建地址和文件名，并保存图片
    newPath := MakeDir(path)
    err = imaging.Save(corePic, newPath)
    if err != nil {
        log.Fatal(err)
    }
}

原图：

image.png

裁剪后：

image.png