將圖像轉換爲android中的鉛筆素描

Question

我必須將圖像轉換爲android中的鉛筆素描。

我使用了上述問題之一中提到的cataleno框架和colorDodge函數的概念。

這是我的函數：

public void onBwClick(View v) { 
    Bitmap bm = ((BitmapDrawable) mImageView.getDrawable()).getBitmap(); 

    FastBitmap fb = new FastBitmap(bm); 

    Grayscale g = new Grayscale(); 
    g.applyInPlace(fb); 

    Invert i = new Invert(); 
    i.applyInPlace(fb); 

    GaussianBlur gb = new GaussianBlur(); 
    gb.applyInPlace(fb); 

    FastBitmap xb = new FastBitmap(bm); 
    Grayscale gs = new Grayscale(); 
    g.applyInPlace(xb); 

    Bitmap result = colorDodgeBlend(fb.toBitmap(), xb.toBitmap()); 

    mImageView.setImageBitmap(result); 
} 

這是colorDodgeBlend功能：

public Bitmap colorDodgeBlend(Bitmap source, Bitmap layer) { 
    Log.d("", "logger enter colorDodgeBlend"); 
    Bitmap base = source.copy(Config.ARGB_8888, true); 
    Bitmap blend = layer.copy(Config.ARGB_8888, false); 

    IntBuffer buffBase = IntBuffer.allocate(base.getWidth() 
      * base.getHeight()); 
    base.copyPixelsToBuffer(buffBase); 
    buffBase.rewind(); 

    IntBuffer buffBlend = IntBuffer.allocate(blend.getWidth() 
      * blend.getHeight()); 
    blend.copyPixelsToBuffer(buffBlend); 
    buffBlend.rewind(); 

    IntBuffer buffOut = IntBuffer.allocate(base.getWidth() 
      * base.getHeight()); 
    buffOut.rewind(); 

    while (buffOut.position() < buffOut.limit()) { 
     int filterInt = buffBlend.get(); 
     int srcInt = buffBase.get(); 

     int redValueFilter = Color.red(filterInt); 
     int greenValueFilter = Color.green(filterInt); 
     int blueValueFilter = Color.blue(filterInt); 

     int redValueSrc = Color.red(srcInt); 
     int greenValueSrc = Color.green(srcInt); 
     int blueValueSrc = Color.blue(srcInt); 

     int redValueFinal = colordodge(redValueFilter, redValueSrc); 
     int greenValueFinal = colordodge(greenValueFilter, greenValueSrc); 
     int blueValueFinal = colordodge(blueValueFilter, blueValueSrc); 

     int pixel = Color.argb(255, redValueFinal, greenValueFinal, 
       blueValueFinal); 

     float[] hsv = new float[3]; 
     Color.colorToHSV(pixel, hsv); 
     hsv[1] = 0.0f; 
     float top = VALUE_TOP; // Setting this as 0.95f gave the best result so far 
     if (hsv[2] <= top) { 
      hsv[2] = 0.0f; 
     } else { 
      hsv[2] = 1.0f; 
     } 
     pixel = Color.HSVToColor(hsv); 

     buffOut.put(pixel); 
    } 

    buffOut.rewind(); 

    base.copyPixelsFromBuffer(buffOut); 
    blend.recycle(); 
    Log.d("", "logger executed colorDodgeBlend"); 
    return base; 
} 

最後，這是我得到的輸出： ！ https://drive.google.com/file/d/0B9LDDNqlgTC1U3E3QXdiejk1Q28/edit?usp=sharing

這就是我的願望： ！ https://drive.google.com/file/d/0B9LDDNqlgTC1QkFPSmJFOXMyaUU/edit?usp=sharing

請在此幫助我。

Answer 1

你需要做2件事以下。 1 ..使用此代碼模糊效果半徑= 10或更多。

public Bitmap fastblur(Bitmap sentBitmap, int radius) { 

     Bitmap bitmap = sentBitmap.copy(sentBitmap.getConfig(), true); 

     if (radius < 1) { 
      return (null); 
     } 

     int w = bitmap.getWidth(); 
     int h = bitmap.getHeight(); 

     int[] pix = new int[w * h]; 
     Log.e("pix", w + " " + h + " " + pix.length); 
     bitmap.getPixels(pix, 0, w, 0, 0, w, h); 

     int wm = w - 1; 
     int hm = h - 1; 
     int wh = w * h; 
     int div = radius + radius + 1; 

     int r[] = new int[wh]; 
     int g[] = new int[wh]; 
     int b[] = new int[wh]; 
     int rsum, gsum, bsum, x, y, i, p, yp, yi, yw; 
     int vmin[] = new int[Math.max(w, h)]; 

     int divsum = (div + 1) >> 1; 
     divsum *= divsum; 
     int dv[] = new int[256 * divsum]; 
     for (i = 0; i < 256 * divsum; i++) { 
      dv[i] = (i/divsum); 
     } 

     yw = yi = 0; 

     int[][] stack = new int[div][3]; 
     int stackpointer; 
     int stackstart; 
     int[] sir; 
     int rbs; 
     int r1 = radius + 1; 
     int routsum, goutsum, boutsum; 
     int rinsum, ginsum, binsum; 

     for (y = 0; y < h; y++) { 
      rinsum = ginsum = binsum = routsum = goutsum = boutsum = rsum = gsum = bsum = 0; 
      for (i = -radius; i <= radius; i++) { 
       p = pix[yi + Math.min(wm, Math.max(i, 0))]; 
       sir = stack[i + radius]; 
       sir[0] = (p & 0xff0000) >> 16; 
       sir[1] = (p & 0x00ff00) >> 8; 
       sir[2] = (p & 0x0000ff); 
       rbs = r1 - Math.abs(i); 
       rsum += sir[0] * rbs; 
       gsum += sir[1] * rbs; 
       bsum += sir[2] * rbs; 
       if (i > 0) { 
        rinsum += sir[0]; 
        ginsum += sir[1]; 
        binsum += sir[2]; 
       } else { 
        routsum += sir[0]; 
        goutsum += sir[1]; 
        boutsum += sir[2]; 
       } 
      } 
      stackpointer = radius; 

      for (x = 0; x < w; x++) { 

       r[yi] = dv[rsum]; 
       g[yi] = dv[gsum]; 
       b[yi] = dv[bsum]; 

       rsum -= routsum; 
       gsum -= goutsum; 
       bsum -= boutsum; 

       stackstart = stackpointer - radius + div; 
       sir = stack[stackstart % div]; 

       routsum -= sir[0]; 
       goutsum -= sir[1]; 
       boutsum -= sir[2]; 

       if (y == 0) { 
        vmin[x] = Math.min(x + radius + 1, wm); 
       } 
       p = pix[yw + vmin[x]]; 

       sir[0] = (p & 0xff0000) >> 16; 
       sir[1] = (p & 0x00ff00) >> 8; 
       sir[2] = (p & 0x0000ff); 

       rinsum += sir[0]; 
       ginsum += sir[1]; 
       binsum += sir[2]; 

       rsum += rinsum; 
       gsum += ginsum; 
       bsum += binsum; 

       stackpointer = (stackpointer + 1) % div; 
       sir = stack[(stackpointer) % div]; 

       routsum += sir[0]; 
       goutsum += sir[1]; 
       boutsum += sir[2]; 

       rinsum -= sir[0]; 
       ginsum -= sir[1]; 
       binsum -= sir[2]; 

       yi++; 
      } 
      yw += w; 
     } 
     for (x = 0; x < w; x++) { 
      rinsum = ginsum = binsum = routsum = goutsum = boutsum = rsum = gsum = bsum = 0; 
      yp = -radius * w; 
      for (i = -radius; i <= radius; i++) { 
       yi = Math.max(0, yp) + x; 

       sir = stack[i + radius]; 

       sir[0] = r[yi]; 
       sir[1] = g[yi]; 
       sir[2] = b[yi]; 

       rbs = r1 - Math.abs(i); 

       rsum += r[yi] * rbs; 
       gsum += g[yi] * rbs; 
       bsum += b[yi] * rbs; 

       if (i > 0) { 
        rinsum += sir[0]; 
        ginsum += sir[1]; 
        binsum += sir[2]; 
       } else { 
        routsum += sir[0]; 
        goutsum += sir[1]; 
        boutsum += sir[2]; 
       } 

       if (i < hm) { 
        yp += w; 
       } 
      } 
      yi = x; 
      stackpointer = radius; 
      for (y = 0; y < h; y++) { 
       // Preserve alpha channel: (0xff000000 & pix[yi]) 
       pix[yi] = (0xff000000 & pix[yi]) | (dv[rsum] << 16) 
         | (dv[gsum] << 8) | dv[bsum]; 

       rsum -= routsum; 
       gsum -= goutsum; 
       bsum -= boutsum; 

       stackstart = stackpointer - radius + div; 
       sir = stack[stackstart % div]; 

       routsum -= sir[0]; 
       goutsum -= sir[1]; 
       boutsum -= sir[2]; 

       if (x == 0) { 
        vmin[y] = Math.min(y + r1, hm) * w; 
       } 
       p = x + vmin[y]; 

       sir[0] = r[p]; 
       sir[1] = g[p]; 
       sir[2] = b[p]; 

       rinsum += sir[0]; 
       ginsum += sir[1]; 
       binsum += sir[2]; 

       rsum += rinsum; 
       gsum += ginsum; 
       bsum += binsum; 

       stackpointer = (stackpointer + 1) % div; 
       sir = stack[stackpointer]; 

       routsum += sir[0]; 
       goutsum += sir[1]; 
       boutsum += sir[2]; 

       rinsum -= sir[0]; 
       ginsum -= sir[1]; 
       binsum -= sir[2]; 

       yi += w; 
      } 
     } 

     Log.e("pix", w + " " + h + " " + pix.length); 
     bitmap.setPixels(pix, 0, w, 0, 0, w, h); 

     return (bitmap); 
    } 

2 ..從colorDodgeBlend功能下面的代碼刪除

float[] hsv = new float[3]; 
     Color.colorToHSV(pixel, hsv); 
     hsv[1] = 0.0f; 
     float top = VALUE_TOP; // Setting this as 0.95f gave the best result so far 
     if (hsv[2] <= top) { 
      hsv[2] = 0.0f; 
     } else { 
      hsv[2] = 1.0f; 
     } 
     pixel = Color.HSVToColor(hsv);