README
¶
imgo
golang图像处理工具库，图像相似度计算，图像二值化(golang image process lib)
目前只支持jpg,png
安装
go get github.com/Comdex/imgo
示例
package main
import(
"github.com/Comdex/imgo"
)
func main(){
//如果读取出错会panic,返回图像矩阵img
//img[height][width][4],height为图像高度,width为图像宽度
//img[height][width][4]为第height行第width列上像素点的RGBA数值数组，值范围为0-255
//如img[150][20][0]是150行20列处像素的红色值,img[150][20][1]是150行20列处像素的绿
//色值，img[150][20][2]是150行20列处像素的蓝色值,img[150][20][3]是150行20列处像素
//的alpha数值,一般用作不透明度参数,如果一个像素的alpha通道数值为0%，那它就是完全透明的.
img:=imgo.MustRead("example/test.jpg")
//对原图像矩阵进行日落效果处理
img2:=imgo.SunsetEffect(img)
//保存为jpeg,100为质量，1-100
err:=imgo.SaveAsJPEG("example/new.jpg",img2,100)
if err!=nil {
panic(err)
}
}
计算两张图片的余弦相似度
cos,err:=imgo.CosineSimilarity("test1.jpg","test2.jpg")
if err!=nil{
panic(err)
}
fmt.Println(cos)
2015.8.23 update :添加使用感知哈希算法的GetFingerprint函数获取图片的“指纹”字符串
fp,err:=imgo.GetFingerprint("test1.jpg")
if err!=nil {
panic(err)
}
fmt.Println(fp)//输出64位的01字符串
效果
原图
横向镜像imgo.HorizontalMirror
日落imgo.SunsetEffect
负片imgo.NegativeFilmEffect
调整亮度imgo.AdjustBrightness
垂直镜像imgo.VerticalMirror
更多api及帮助请访问：http://godoc.org/github.com/Comdex/imgo
版权
Documentation
¶
Overview ¶
package imgo is a golang image process lib
Index ¶
- func AdjustBrightness(src [][][]uint8, light float64) (imgMatrix [][][]uint8, err error)
- func Base64ToImg(encodeString string, dstFile string) error
- func Binaryzation(src [][][]uint8, threshold int) [][][]uint8
- func CosineSimilarity(src1 string, src2 string) (cossimi float64, err error)
- func DecodeImage(filePath string) (img image.Image, err error)
- func Dot(x []uint8, y []uint8) float64
- func GetFingerprint(src string) (fp string, err error)
- func GetImageHeight(img image.Image) int
- func GetImageWidth(img image.Image) int
- func HorizontalMirror(src [][][]uint8) [][][]uint8
- func HorizontalMirrorPart(src [][][]uint8) [][][]uint8
- func ImageFusion(src1 string, src2 string) (imgMatrix [][][]uint8, err error)
- func Img2Base64(filepath string) (encodeString string, err error)
- func Img2Base64ByGoImage(img image.Image) (encodeString string, err error)
- func Iterator(filepath string, iter IterFunc) (imgMatrix [][][]uint8, err error)
- func Matrix2Vector(imgMatrix [][][]uint8) (vector []uint8)
- func MustRead(filepath string) (imgMatrix [][][]uint8)
- func NegativeFilmEffect(src [][][]uint8) [][][]uint8
- func New3DSlice(x int, y int, z int) (theSlice [][][]uint8)
- func NewRGBAMatrix(height int, width int) (rgbaMatrix [][][]uint8)
- func RGB2Gray(src [][][]uint8) [][][]uint8
- func Read(imgOrPath interface{}) (imgMatrix [][][]uint8, err error)
- func Resize(src *image.NRGBA, width int, height int) *image.NRGBA
- func ResizeForMatrix(filepath string, width int, height int) (imgMatrix [][][]uint8, err error)
- func Rotate(src [][][]uint8) [][][]uint8
- func SaveAsJPEG(filepath string, imgMatrix [][][]uint8, quality int) error
- func SaveAsPNG(filepath string, imgMatrix [][][]uint8) error
- func SetOpacity(src [][][]uint8, opacity float64) (imgMatrix [][][]uint8, err error)
- func SunsetEffect(src [][][]uint8) [][][]uint8
- func VerticalMirror(src [][][]uint8) [][][]uint8
- func VerticalMirrorPart(src [][][]uint8) [][][]uint8
- type IterFunc
Constants ¶
This section is empty.
Variables ¶
This section is empty.
Functions ¶
func AdjustBrightness ¶
func Base64ToImg ¶
Base64ToImg create a image file named dstFile from base64 encodeString.
func Binaryzation ¶
binaryzation process of image matrix , threshold can use 127 to test
func CosineSimilarity ¶
calculate Cosine Similarity of two images, input two file path
func DecodeImage ¶
decode a image and retrun golang image interface
func GetFingerprint ¶
GetFingerprint use Perceptual Hash Algorithm to get fingerprint from a pircture
func GetImageHeight ¶
func GetImageWidth ¶
func HorizontalMirror ¶
func HorizontalMirrorPart ¶
make a mirror of src
func ImageFusion ¶
fuse two images(filepath) and the size of new image is as src1
func Img2Base64 ¶
Img2Base64 produce a base64 string from a image file.
func Img2Base64ByGoImage ¶
Img2base64ByGoImage produce a base64 string from Image interface.
func Matrix2Vector ¶
func NegativeFilmEffect ¶
input a image as src , return a image matrix by negativefilmeffect process
func New3DSlice ¶
create a three dimenson slice
func NewRGBAMatrix ¶
create a new rgba matrix
func ResizeForMatrix ¶
func SaveAsJPEG ¶
save a image matrix as a jpeg,if unsuccessful it will return a error,quality must be 1 to 100
func SetOpacity ¶
set the opacity of image matrix , opacity must be 0.0 to 1.0
func SunsetEffect ¶
input a image matrix as src , return a image matrix by sunseteffect process
Source Files