Image

本文整理汇总了Golang中image.Image函数的典型用法代码示例。如果您正苦于以下问题：Golang Image函数的具体用法？Golang Image怎么用？Golang Image使用的例子？那么恭喜您, 这里精选的函数代码示例或许可以为您提供帮助。

在下文中一共展示了Image函数的20个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于我们的系统推荐出更棒的Golang代码示例。

示例1: RevisitMsg

func (ri *RevisitImage) RevisitMsg() (*RevisitMsg, error) {
    buf := bytes.NewBuffer(nil)

    switch ri.ImgType {
    case "image/jpeg":
        err := jpeg.Encode(buf, image.Image(image.Image(&ri.Rgbas[0])), nil)
        if err != nil {
            return nil, err
        }

    case "image/png":
        err := png.Encode(buf, image.Image(&ri.Rgbas[0]))
        if err != nil {
            return nil, err
        }

    case "image/gif":
        g := &gif.GIF{
            Image:     make([]*image.Paletted, 0),
            LoopCount: ri.LoopCount,
            Delay:     make([]int, 0),
        }

        for index, src := range ri.Rgbas {
            b := src.Bounds()
            pal := image.NewPaletted(image.Rect(0, 0, b.Dx(), b.Dy()), ri.Palette[index])
            draw.Draw(pal, pal.Bounds(), image.Image(&src), b.Min, draw.Src)

            g.Image = append(g.Image, pal)
            g.Delay = append(g.Delay, ri.Delay[index])
        }

        buf := bytes.NewBuffer(nil)
        err := gif.EncodeAll(buf, g)
        if err != nil {
            return nil, err
        }

        dstImgBase64 := base64.StdEncoding.EncodeToString(buf.Bytes())
        return &RevisitMsg{
            Content: ImageData{
                Data: fmt.Sprintf("data:%s;base64,%s", ri.ImgType, dstImgBase64),
            },
        }, nil

    default:
        return nil, errors.New("invalid image type")
    }

    dstImgBase64 := base64.StdEncoding.EncodeToString(buf.Bytes())
    return &RevisitMsg{
        Content: ImageData{
            Data: fmt.Sprintf("data:%s;base64,%s", ri.ImgType, dstImgBase64),
        },
    }, nil
}

开发者ID:revisitors，项目名称:gorevisit，代码行数:56，代码来源:revisit_image.go

示例2: ImageTransformByProfile

func ImageTransformByProfile(src_image image.Image, src_prof, dst_prof *Profile) (image.Image, error) {
    var dst_image image.Image
    rect := src_image.Bounds()
    width := rect.Dx()
    height := rect.Dy()
    colorModel := src_image.ColorModel()
    // 今のところ RGBA, YCbCr のみ対応
    if (colorModel != color.YCbCrModel) && (colorModel != color.RGBAModel) {
        return nil, fmt.Errorf("ImageTransformByProfile: Unsupported ColorModel(%d)", colorModel)
    }
    var src_rgba *image.RGBA
    var src_ycbcr *image.YCbCr
    if colorModel == color.YCbCrModel {
        // YCbCr の場合は RGB に変換する
        src_ycbcr = src_image.(*image.YCbCr)
        src_rgba = image.NewRGBA(rect)
        DrawYCbCr(src_rgba, rect, src_ycbcr, image.Pt(0, 0))
    } else {
        src_rgba = src_image.(*image.RGBA) // type assertions
    }
    transform := CreateTransform(src_prof, DATA_RGBA_8, dst_prof, DATA_RGBA_8)
    defer transform.DeleteTransform()
    if transform == nil {
        return nil, fmt.Errorf("ImageTransformByProfile: CreateTransform Failedl(%d)", colorModel)
    }
    dst_rgba := image.NewRGBA(rect)
    src_pix := src_rgba.Pix
    dst_pix := dst_rgba.Pix
    len_pix := len(src_pix)
    transform.DoTransform(src_pix, dst_pix, len_pix)
    // YCbCr の場合は RGB から戻す
    if colorModel == color.YCbCrModel {
        dst_ycbcr := image.NewYCbCr(rect, src_ycbcr.SubsampleRatio)
        var x int
        var y int
        for y = 0; y < height; y++ {
            for x = 0; x < width; x++ {
                r, g, b, _ := dst_rgba.At(x, y).RGBA()
                yy, cb, cr := color.RGBToYCbCr(uint8(r), uint8(g), uint8(b))
                yi := dst_ycbcr.YOffset(x, y)
                ci := dst_ycbcr.COffset(x, y)
                dst_ycbcr.Y[yi] = yy
                dst_ycbcr.Cb[ci] = cb
                dst_ycbcr.Cr[ci] = cr
            }
        }
        dst_image = image.Image(dst_ycbcr)
    } else {
        dst_image = image.Image(dst_rgba)
    }

    return dst_image, nil
}

开发者ID:yoya，项目名称:go-qcms，代码行数:53，代码来源:image.go

示例3: Copy

// Copy copies the part of the source image defined by src and sr and writes to
// the part of the destination image defined by dst and the translation of sr
// so that sr.Min translates to dp.
func Copy(dst Image, dp image.Point, src image.Image, sr image.Rectangle, opts *Options) {
    mask, mp, op := image.Image(nil), image.Point{}, Over
    if opts != nil {
        // TODO: set mask, mp and op.
    }
    dr := sr.Add(dp.Sub(sr.Min))
    DrawMask(dst, dr, src, sr.Min, mask, mp, op)
}

开发者ID:nangong92t，项目名称:go_src，代码行数:11，代码来源:scale.go

示例4: testInterlacedFailWith

func testInterlacedFailWith(t *testing.T, rgb bool) {
    src := readImage(t, "testdata/lenna.jpg")
    dst := image.Image(image.NewYCbCr(image.Rect(0, 0, 640, 480), image.YCbCrSubsampleRatio420))
    if rgb {
        src = toRgb(src)
        dst = toRgb(dst)
    }
    convert(t, dst, src, false, true, NewBicubicFilter())
    convert(t, dst, src, true, true, NewBicubicFilter())
}

开发者ID:donlzx，项目名称:rez，代码行数:10，代码来源:resize_test.go

示例5: analyse

func analyse(settings CropSettings, img image.Image, cropWidth, cropHeight, realMinScale float64) (Crop, error) {
    o := image.Image(image.NewRGBA(img.Bounds()))

    now := time.Now()
    edgeDetect(img, o)
    log.Println("Time elapsed edge:", time.Since(now))
    debugOutput(settings.DebugMode, &o, "edge")

    now = time.Now()
    if settings.FaceDetection {
        err := faceDetect(settings, img, o)

        if err != nil {
            return Crop{}, err
        }

        log.Println("Time elapsed face:", time.Since(now))
        debugOutput(settings.DebugMode, &o, "face")
    } else {
        skinDetect(img, o)
        log.Println("Time elapsed skin:", time.Since(now))
        debugOutput(settings.DebugMode, &o, "skin")
    }

    now = time.Now()
    saturationDetect(img, o)
    log.Println("Time elapsed sat:", time.Since(now))
    debugOutput(settings.DebugMode, &o, "saturation")

    now = time.Now()
    var topCrop Crop
    topScore := -1.0
    cs := crops(o, cropWidth, cropHeight, realMinScale)
    log.Println("Time elapsed crops:", time.Since(now), len(cs))

    now = time.Now()
    for _, crop := range cs {
        nowIn := time.Now()
        crop.Score = score(&o, &crop)
        log.Println("Time elapsed single-score:", time.Since(nowIn))
        if crop.Score.Total > topScore {
            topCrop = crop
            topScore = crop.Score.Total
        }
    }
    log.Println("Time elapsed score:", time.Since(now))

    if settings.DebugMode {
        drawDebugCrop(&topCrop, &o)
        debugOutput(true, &o, "final")
    }

    return topCrop, nil
}

开发者ID:dexter-cn，项目名称:smartcrop，代码行数:54，代码来源:crop.go