Android图像处理库

Question

我在一个小的android应用程序上工作，我想做一个图像上的效果，即素描，单色，深褐色，木炭，油画颜料，否定，翻转，浮雕等影响图像，也改变色调，饱和度，亮度，对比度，锐度图像。有没有为这样的工具准备的Android库。我真的很感谢你的帮助。

Answer 1

请试用此库

Answer 2

使用下面的代码为位图添加对比度:值的范围从1到100

public static Bitmap AdjustContrast(Bitmap original, float Value){
        Value                                       =   (100.0f + Value) / 100.0f;
        Value *= Value;
        Bitmap newBitmap                            =   Bitmap.createBitmap(original.getWidth(), original.getHeight(),original.getConfig());
        int[] argb                                  =   new int[original.getWidth() * original.getHeight()];
        original.getPixels(argb, 0, original.getWidth(), 0, 0, original.getWidth(), original.getHeight());
        for (int i = argb.length - 1; i >= 0; --i) {
        int alpha                                   =   argb[i] >> 24;
        int red                                     =   (argb[i] >> 16) & 0xFF;
        int green                                   =   (argb[i] >> 8) & 0xFF;
        int blue                                    =   argb[i] & 0xFF;         
        float Red                                   =   red / 255.0f;
        float Green                                 =   green / 255.0f;
        float Blue                                  =   blue / 255.0f;
        Red                                         =   (((Red - 0.5f) * Value) + 0.5f) * 255.0f;
        Green                                       =   (((Green - 0.5f) * Value) + 0.5f) * 255.0f;
        Blue                                        =   (((Blue - 0.5f) * Value) + 0.5f) * 255.0f;
        int iR                                      =   (int)Red;
        iR                                          =   iR > 255 ? 255 : iR;
        iR                                          =   iR < 0 ? 0 : iR;
        int iG                                      =   (int)Green;
        iG                                          =   iG > 255 ? 255 : iG;
        iG                                          =   iG < 0 ? 0 : iG;
        int iB                                      =   (int)Blue;
        iB                                          =   iB > 255 ? 255 : iB;
        iB                                          =   iB < 0 ? 0 : iB;                   
        int composite                               =   (alpha << 24) | (iR << 16) | (iG << 8) | iB;
        argb[i]                                     =   composite;
        }
        newBitmap.setPixels(argb, 0, original.getWidth(), 0, 0, original.getWidth(), original.getHeight());
        Store.lastBitmap                            =   newBitmap;
        return newBitmap;
    }

对亮度效果使用此选项:值应在1到100之间

public static Bitmap makeBrightnessBitmap(Bitmap original, int brightness){
        Bitmap newBitmap                            =   Bitmap.createBitmap(original.getWidth(), original.getHeight(),original.getConfig());
        int[] argb                                  =   new int[original.getWidth() * original.getHeight()];
        original.getPixels(argb, 0, original.getWidth(), 0, 0, original.getWidth(), original.getHeight());
        for (int i = argb.length - 1; i >= 0; --i) {
            int alpha                               =   argb[i] >> 24;
            int red                                 =   (argb[i] >> 16) & 0xFF;
            int green                               =   (argb[i] >> 8) & 0xFF;
            int blue                                =   argb[i] & 0xFF;                      
            int red2                                =   red + brightness;
            if (red2>0xFF) red2                     =   0xFF;
            if (red2<0) red2                        =   0;
            int green2                              =   green + brightness;
            if (green2>0xFF) green2                 =   0xFF;
            if (green2<0) green2                    =   0;
            int blue2                               =   blue + brightness;
            if (blue2>0xFF) blue2                   =   0xFF;
            if (blue2<0) blue2                      =   0;                 
            int composite                           =   (alpha << 24) | (red2 << 16) | (green2 << 8) | blue2;
            argb[i]                                 =   composite;
        }
        newBitmap.setPixels(argb, 0, original.getWidth(), 0, 0, original.getWidth(), original.getHeight());
        Store.lastBitmap                            =   newBitmap;
        return newBitmap;
    }

Answer 3

基本的图片效果可以通过标准的android工具来实现。查看android.graphics包(它们使用原生图像格式和位图)