func procImage(fileName string) (string, error) {
reader, err := os.Open(fileName)
if err != nil {
fmt.Errorf("Failed to open image with error: %s\n", err)
return "", err
}
defer reader.Close()
src, _, err := image.Decode(reader)
if err != nil {
fmt.Errorf("Failed to decode image with error: %s\n", err)
return "", err
}
g := gift.New(
gift.Invert(),
)
dst := image.NewRGBA(g.Bounds(src.Bounds()))
g.Draw(dst, src)
var opt jpeg.Options
opt.Quality = 100
fileName = fileName + "_processed.jpg"
out, _ := os.Create(fileName)
err = jpeg.Encode(out, dst, &opt)
if err != nil {
fmt.Errorf("Failed to encode image with error: %s\n", err)
return "", err
}
return fileName, nil
}
func InvertImage(input string, outfile string) {
reader, err := os.Open(input)
if err != nil {
panic(err)
}
defer reader.Close()
img, _, err := image.Decode(reader)
if err != nil {
panic(err)
}
bounds := img.Bounds()
inverted := image.NewNRGBA(bounds)
for y := bounds.Min.Y; y < bounds.Max.Y; y++ {
for x := bounds.Min.X; x < bounds.Max.X; x++ {
r, g, b, a := img.At(x, y).RGBA()
r = 255 - r>>8
g = 255 - g>>8
b = 255 - b>>8
inverted.SetNRGBA(x, y, color.NRGBA{uint8(r), uint8(g), uint8(b), uint8(a)})
}
}
pwd, _ := os.Getwd()
fileName := path.Join(pwd, outfile)
fp, err := os.Create(fileName)
if err != nil {
panic(err)
}
idx := strings.LastIndex(fileName, ".")
if idx == -1 {
panic(errors.New("you dont have a supported output file"))
}
ext := fileName[idx+1:]
if ext == "png" {
err = png.Encode(fp, inverted)
if err != nil {
panic(err)
}
} else if ext == "jpeg" || ext == "jpg" {
var opt jpeg.Options
opt.Quality = 100
err = jpeg.Encode(fp, inverted, &opt)
if err != nil {
panic(err)
}
} else if ext == "gif" {
var opt gif.Options
opt.NumColors = 256
err = gif.Encode(fp, inverted, &opt)
} else {
panic(errors.New("you dont have a supported output file"))
}
}
func WriteToFile(filename string, img *image.RGBA) error {
out, _ := os.Create(filename)
switch ext := path.Ext(filename); ext {
case ".jpg", ".jpeg":
var opt jpeg.Options
opt.Quality = 1000
jpeg.Encode(out, img, &opt)
case ".png":
png.Encode(out, img)
default:
return errors.New("Unable to encode image")
}
return nil
}
func writeToJPEG(imageData image.Image) {
out, osCreateErr := os.Create(outputImage)
if osCreateErr != nil {
log.Println("Create File (OS): ", osCreateErr)
}
defer out.Close()
var opt jpeg.Options
opt.Quality = 100
jpegErr := jpeg.Encode(out, imageData, &opt)
if jpegErr != nil {
log.Println("Create File (JPEG Encode): ", jpegErr)
}
}
func SameToDisk(context *common.AppContext, imagePath string, imageToSave *image.Image) error {
if imgFilePng, err := os.Create(imagePath); err != nil {
context.Log.Printf("Error saving PNG image: %s\n", err)
return err
} else {
defer imgFilePng.Close()
buffer := bufio.NewWriter(imgFilePng)
var opt jpeg.Options
opt.Quality = 95
err := jpeg.Encode(buffer, *imageToSave, &opt)
if err != nil {
context.Log.Printf("Error encoding image:%s", err)
return err
}
buffer.Flush()
return nil
}
}
func main() {
//image.RegisterFormat(name, magic, decode, decodeConfig)
file, err := os.Open("E:\\psds18291.jpg")
if err != nil {
log.Fatal("open file err:", err)
}
defer file.Close()
img, str, err := image.Decode(file)
if err != nil {
log.Fatal("decode image err:", err)
}
log.Println(img.Bounds(), str)
outfilepng, err := os.OpenFile("c:\\test1.jpg", os.O_CREATE|os.O_WRONLY, 0666)
if err != nil {
return
}
outfilejpg, err := os.OpenFile("c:\\test.jpg", os.O_CREATE|os.O_WRONLY, 0666)
if err != nil {
return
}
defer outfilejpg.Close()
defer outfilepng.Close()
rect := img.Bounds()
rect = rect.Inset(10)
m0 := image.NewRGBA(image.Rect(0, 0, 80, 50))
for i := 0; i < m0.Bounds().Dx(); i++ {
for j := 0; j < m0.Bounds().Dy(); j++ {
m0.Set(i, j, color.RGBA{255, 0, 0, 255})
}
}
m1, _ := m0.SubImage(image.Rect(1, 2, 5, 5)).(*image.RGBA)
fmt.Println(m0.Bounds().Dx(), m1.Bounds().Dx())
fmt.Println(m0.Stride == m1.Stride)
m2 := m0.SubImage(image.Rect(0, 0, m0.Bounds().Dx(), m0.Bounds().Dy()))
fmt.Println(m2.Bounds().Dx(), m2.Bounds().Dy())
opt := jpeg.Options{Quality: 10}
jpeg.Encode(outfilejpg, img, &opt)
//png.Encode(outfilepng, img)
//png.Encode(outfilepng, m0)
uniform := image.NewUniform(color.RGBA{255, 255, 0, 0})
//png.Encode(outfilepng, uniform)
opt.Quality = 100
jpeg.Encode(outfilepng, uniform, &opt)
}
func extractAndProcess(context *common.AppContext, fileNames <-chan string, results chan<- string, errChan chan<- error, directoryName string) {
for fileName := range fileNames {
filePath := common.DownloadBasePath + directoryName + "/" + fileName
imageFile, err := os.Open(filePath)
if err != nil {
context.Log.Printf("Unable to open the image file %v Error is %v \n", fileName, err)
errChan <- err
}
img, _, err := image.Decode(imageFile)
if err != nil {
context.Log.Println("ERROR: Not able to decode the image file. Error is: ", err)
errChan <- err
}
nrgbaImage := ToNRGBA(img)
bounds := nrgbaImage.Bounds()
boundsString := fmt.Sprintln(bounds)
context.Log.Println("The bounds BEFORE the resize are: ", boundsString)
nrgbaImage = Resize(context, nrgbaImage, tileSize, tileSize)
bounds = nrgbaImage.Bounds()
boundsString = fmt.Sprintln(bounds)
context.Log.Println("The bounds AFTER the resize are: ", boundsString)
var opt jpeg.Options
opt.Quality = 80
imageFile.Close()
writeFile, err := os.Create(filePath)
if err != nil {
context.Log.Println("Unable to open the file for writing. Error is:", err)
}
err = jpeg.Encode(writeFile, nrgbaImage, &opt)
if err != nil {
context.Log.Println("ERROR: Not able to write to file with JPEG encoding", err)
errChan <- err
}
results <- boundsString
writeFile.Close()
}
}
func Barcode(data string) (pdf *gofpdf.Fpdf, err error) {
b, err := code128.Encode(data)
if err != nil {
return
}
b, err = barcode.Scale(b, b.Bounds().Size().X, 10)
if err != nil {
panic(err)
}
out, err := ioutil.TempFile("", "lblmgrpnpbarcode")
if err != nil {
panic(err)
}
var opt jpeg.Options
opt.Quality = 100
err = jpeg.Encode(out, b, &opt)
if err != nil {
return
}
imgHeight := float64(b.Bounds().Size().Y)
imgWidth := float64(b.Bounds().Size().X / 3)
pdf = gofpdf.NewCustom(&gofpdf.InitType{
UnitStr: "mm",
Size: gofpdf.SizeType{Wd: imgWidth, Ht: imgHeight},
})
pdf.AddPage()
height, width := pdf.GetPageSize()
pdf.Image(out.Name(), 0, 0, height, width, false, "jpg", 0, "")
pdf.SetFillColor(255, 255, 255)
pdf.Rect(0, 7, imgWidth, 5, "F")
pdf.SetFont("Arial", "B", 6)
pdf.Text(0, 9.1, data)
out.Close()
os.Remove(out.Name())
return
}
func writeImgToFile(img image.Image, filename string) {
out, err := os.Create(filename)
if err != nil {
fmt.Println(err)
os.Exit(1)
}
var opt jpeg.Options
opt.Quality = 100
// ok, write out the data into the new JPEG file
err = jpeg.Encode(out, img, &opt) // put quality to 80%
if err != nil {
fmt.Println(err)
os.Exit(1)
}
fmt.Println("Generated image to " + filename + " \n")
}
func writeToJP(t int) {
outFile := fmt.Sprint("/Users/muralib/go/output/output", strconv.Itoa(t), ".jpg")
if t < 10 {
outFile = fmt.Sprint("/Users/muralib/go/output/output00", strconv.Itoa(t), ".jpg")
} else if t < 100 {
outFile = fmt.Sprint("/Users/muralib/go/output/output0", strconv.Itoa(t), ".jpg")
}
out, err := os.Create(outFile)
if err != nil {
fmt.Println(err)
os.Exit(1)
}
imgRect := image.Rect(0, 0, gridSize*10, gridSize*10)
img := image.NewGray(imgRect)
draw.Draw(img, img.Bounds(), &image.Uniform{color.White}, image.ZP, draw.Src)
for x := 0; x < gridSize; x++ {
for y := 0; y < gridSize; y++ {
fill := &image.Uniform{color.White}
if Env[x][y] == -1 {
fill = &image.Uniform{color.Black}
} else if Env[x][y] > 1 {
c := color.Gray{uint8(Env[x][y] * 20)}
fill = &image.Uniform{c}
}
draw.Draw(img, image.Rect((x-1)*10, (y-1)*10, x*10, y*10), fill, image.ZP, draw.Src)
}
}
var opt jpeg.Options
opt.Quality = 80
// ok, write out the data into the new JPEG file
err = jpeg.Encode(out, img, &opt) // put quality to 80%
if err != nil {
fmt.Println(err)
os.Exit(1)
}
fmt.Println("Generated image to output.jpg \n")
}
func main() {
flag.Parse()
rand.Seed(time.Now().UTC().UnixNano())
for i := 1; i < 10; i++ {
outFile := fmt.Sprint("/Users/muralib/go/output/output", strconv.Itoa(i), ".jpg")
out, err := os.Create(outFile)
if err != nil {
fmt.Println(err)
os.Exit(1)
}
// generate some QR code look a like image
c := color.Gray{uint8(128)}
imgRect := image.Rect(0, 0, 100, 100)
img := image.NewGray(imgRect)
draw.Draw(img, img.Bounds(), &image.Uniform{color.White}, image.ZP, draw.Src)
for y := 0; y < 100; y += 10 {
for x := 0; x < 100; x += 10 {
fill := &image.Uniform{c}
if rand.Intn(10)%2 == 0 {
fill = &image.Uniform{color.White}
}
draw.Draw(img, image.Rect(x, y, x+10, y+10), fill, image.ZP, draw.Src)
}
}
var opt jpeg.Options
opt.Quality = 80
// ok, write out the data into the new JPEG file
err = jpeg.Encode(out, img, &opt) // put quality to 80%
if err != nil {
fmt.Println(err)
os.Exit(1)
}
fmt.Println("Generated image to output.jpg \n")
}
}
func ConvertToJpeg(filename string) (string, error) {
pngImageFile, err := os.Open(filename)
if err != nil {
return "", err
}
defer pngImageFile.Close()
pngSource, err := png.Decode(pngImageFile)
if err != nil {
return "", err
}
jpegImage := image.NewRGBA(pngSource.Bounds())
draw.Draw(jpegImage, jpegImage.Bounds(), &image.Uniform{color.White}, image.Point{}, draw.Src)
draw.Draw(jpegImage, jpegImage.Bounds(), pngSource, pngSource.Bounds().Min, draw.Over)
outfile := fmt.Sprintf("%s_jpg", filename)
jpegImageFile, err := os.Create(outfile)
if err != nil {
return "", err
}
defer jpegImageFile.Close()
var options jpeg.Options
options.Quality = 100
err = jpeg.Encode(jpegImageFile, jpegImage, &options)
if err != nil {
fmt.Printf("JPEG Encoding Error: %v\n", err)
os.Exit(1)
}
return outfile, nil
}
func WriteImage(img image.Image, ext string, w io.Writer) error {
var err error
if ext == "png" {
err = png.Encode(w, img)
if err != nil {
return err
}
} else if ext == "jpeg" || ext == "jpg" {
var opt jpeg.Options
opt.Quality = 100
err = jpeg.Encode(w, img, &opt)
if err != nil {
return err
}
} else if ext == "gif" {
var opt gif.Options
opt.NumColors = 256
err = gif.Encode(w, img, &opt)
} else {
return errors.New("you dont have a supported output file")
}
return nil
}
// generate one thumbnail
func generateThumbnail(image_file string, overwrite bool) error {
var err error
if IsDirectory(thumbs_path) {
source_image := folder_path + "/" + image_file
mime, err := getContentType(source_image)
if err != nil {
return err
}
for thumb_folder, thumb_size := range thumb_sizes {
thumb_folder_path := thumbs_path + "/" + thumb_folder
if !Exists(thumb_folder_path) {
log.Println("Creating folder" + thumb_folder_path)
err := os.Mkdir(thumb_folder_path, 0755)
if err != nil {
return err
}
}
if IsDirectory(thumb_folder_path) {
thumb_file_path := thumb_folder_path + "/" + image_file
width, height, exact_size, err := parseSize(thumb_size)
if err != nil {
return err
}
if Exists(thumb_file_path) && overwrite == false {
log.Printf("Nothing to do, thumb %s already exists\n", thumb_file_path)
} else {
var img image.Image
file, err := os.Open(source_image)
if err != nil {
return err
}
if mime == "image/jpeg" {
img, err = jpeg.Decode(file)
if err != nil {
return err
}
} else if mime == "image/gif" {
img, err = gif.Decode(file)
if err != nil {
return err
}
} else if mime == "image/png" {
img, err = png.Decode(file)
if err != nil {
return err
}
}
file.Close()
var resized_image image.Image
if exact_size {
img_width, img_height, err := getImageDimensions(source_image)
if err != nil {
return err
}
img_ratio := float64(img_width) / float64(img_height)
thumb_ratio := float64(width) / float64(height)
resize_width := uint(width)
resize_height := uint(height)
if img_ratio > thumb_ratio {
resize_width = uint(img_width * 5)
} else {
resize_height = uint(img_height * 5)
}
image := resize.Thumbnail(resize_width, resize_height, img, resize.Lanczos3)
resized_image, err = cutter.Crop(image, cutter.Config{
Width: width,
Height: height,
})
if err != nil {
return err
}
} else {
resized_image = resize.Thumbnail(uint(width), uint(height), img, resize.Lanczos3)
}
out, err := os.Create(thumb_file_path)
if err != nil {
return err
}
defer out.Close()
if mime == "image/jpeg" {
var jpeg_opt jpeg.Options
jpeg_opt.Quality = viper.GetInt("jpeg_quality")
jpeg.Encode(out, resized_image, &jpeg_opt)
} else if mime == "image/gif" {
var gif_opt gif.Options
gif_opt.NumColors = 256
gif.Encode(out, resized_image, &gif_opt)
} else if mime == "image/png" {
png.Encode(out, resized_image)
}
}
} else {
return errors.New("Can't create thumbnails. " + thumb_folder_path + " must be a directory")
}
}
} else {
return errors.New("Thumbs folder doesn't exist or is not a Folder")
}
return err
}
func main() {
image1Ptr := flag.String("i1", "", "input image 1")
image2Ptr := flag.String("i2", "", "input image 2")
image1OutPtr := flag.String("o1", "", "output image 1")
image2OutPtr := flag.String("o2", "", "output image 2")
flag.Parse()
if *image1Ptr == "" {
log.Fatal("Need to provide i1 flag for path to image 1")
}
if *image2Ptr == "" {
log.Fatal("Need to provide i2 flag for path to image 2")
}
image1File, err := os.Open(*image1Ptr)
if err != nil {
log.Fatalf("Failed to open image %s, %v", *image1Ptr, err)
}
defer image1File.Close()
image2File, err := os.Open(*image2Ptr)
if err != nil {
log.Fatalf("Failed to open image %s, %v", *image2Ptr, err)
}
defer image2File.Close()
im1, _, err := image.Decode(image1File)
if err != nil {
log.Fatalf("Failed to decode image %v", err)
}
im2, _, err := image.Decode(image2File)
if err != nil {
log.Fatalf("Failed to decode image %v", err)
}
hash1 := phash.GreyscaleDctMatrix(im1)
hash2 := phash.GreyscaleDctMatrix(im2)
distance := phash.HammingDistance(hash1, hash2)
log.Printf("Image 1 hash: %x\n", hash1)
log.Printf("Image 2 hash: %x\n", hash2)
log.Printf("Hamming Distance: %d", distance)
if *image1OutPtr != "" {
im1 := phash.HashToImage(hash1)
out, _ := os.Create(*image1OutPtr)
var opt jpeg.Options
opt.Quality = 100
_ = jpeg.Encode(out, im1, &opt) // put quality to 80%
}
if *image2OutPtr != "" {
im2 := phash.HashToImage(hash2)
out, _ := os.Create(*image2OutPtr)
var opt jpeg.Options
opt.Quality = 100
_ = jpeg.Encode(out, im2, &opt) // put quality to 80%
}
}