Android Bitmap Blur fastblur(Bitmap sentBitmap)

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Description

Fastblur.

Parameter

Parameter Description
sentBitmap the sent bitmap

Return

the bitmap

Declaration 

public static Bitmap fastblur(Bitmap sentBitmap)

Method Source Code

//package com.java2s;

import java.io.BufferedOutputStream;

import java.io.IOException;
import java.io.InputStream;

import android.graphics.Bitmap;

import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Matrix;

public class Main {
    /**/*from   www  . j  a  va  2s .c o m*/
     * Fastblur in bitmap.
     * 
     * @param sentBitmap
     *            the sent bitmap
     * @param radius
     *            the radius
     * @return the bitmap
     * @author siddhesh
     */
    public static Bitmap fastblur(Bitmap sentBitmap, int radius) {
        Bitmap bitmap = sentBitmap.copy(sentBitmap.getConfig(), true);
        Bitmap origBitmap = sentBitmap.copy(sentBitmap.getConfig(), true);

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

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

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

        final int width = sentBitmap.getWidth();
        final int height = sentBitmap.getHeight();

        final float xc = width / 2;
        final float yc = height / 2;
        final float a1 = width / 6;
        final float b1 = height / 2;

        final double a1Square = Math.pow(a1, 2);
        final double b1Square = Math.pow(b1, 2);

        final double area = Math.PI * a1 * b1; // / area of Ellipse to calculate
        // no of pixels this ellipse can
        // hold //

        int[] intArrEllipsePosition = new int[(int) area];
        int[] intArrEllipseData = new int[(int) area];
        int[] overlayBmp = new int[width * height];

        for (int i = 0; i < overlayBmp.length; i++) {
            overlayBmp[i] = -1;
        }

        // Log.d(TAG, overlayBmp+"");

        sentBitmap.getPixels(overlayBmp, 0, width, 0, 0, width, height);

        int noOfPixelsInEllipse = 0;
        int currPosition = 0;
        for (int currY = 0; currY < height; currY++) {
            for (int currX = 0; currX < width; currX++) {

                double computeEllipseEqn = (Math.pow(currX - xc, 2) / a1Square)
                        + (Math.pow(currY - yc, 2) / b1Square); // /////
                // computation
                // to check if
                // current (x,y)
                // pixel lies in
                // or on ellipse
                // region///

                if (computeEllipseEqn <= 1) {

                    currPosition = (currY * width) + currX + 1; // // mapping
                    // between
                    // current x,y
                    // pixel wrt
                    // pixel array
                    // ///
                    intArrEllipsePosition[noOfPixelsInEllipse] = currPosition;

                    if (computeEllipseEqn > 0.90) {
                        // Log.d("PIX ", "" + computeEllipseEqn);
                        intArrEllipseData[noOfPixelsInEllipse] = Color
                                .argb(0x26, Color.red(pix[currPosition]),
                                        Color.green(pix[currPosition]),
                                        Color.blue(pix[currPosition]));// pix[currPosition];
                    } else if (computeEllipseEqn > 0.70
                            && computeEllipseEqn < 0.90) {
                        // Log.d("PIX 0.70", "" + computeEllipseEqn);
                        intArrEllipseData[noOfPixelsInEllipse] = Color
                                .argb(0x10, Color.red(pix[currPosition]),
                                        Color.green(pix[currPosition]),
                                        Color.blue(pix[currPosition]));// pix[currPosition];
                    } else if (computeEllipseEqn > 0.65
                            && computeEllipseEqn < 0.70) {
                        // Log.d("PIX 0.70", "" + computeEllipseEqn);
                        intArrEllipseData[noOfPixelsInEllipse] = Color
                                .argb(0x10, Color.red(pix[currPosition]),
                                        Color.green(pix[currPosition]),
                                        Color.blue(pix[currPosition]));// pix[currPosition];
                    } else if (computeEllipseEqn > 0.63
                            && computeEllipseEqn < 0.65) {
                        // Log.d("PIX 0.70", "" + computeEllipseEqn);
                        intArrEllipseData[noOfPixelsInEllipse] = Color
                                .argb(0x01, Color.red(pix[currPosition]),
                                        Color.green(pix[currPosition]),
                                        Color.blue(pix[currPosition]));// pix[currPosition];
                    } else {
                        intArrEllipseData[noOfPixelsInEllipse] = pix[currPosition];
                    }

                    // intArrEllipseData[noOfPixelsInEllipse] =
                    // intArrEllipseData[noOfPixelsInEllipse] = Color.argb(0x00,
                    // Color.red(pix[currPosition]),
                    // Color.green(pix[currPosition]),
                    // Color.blue(pix[currPosition]));
                    noOfPixelsInEllipse++;
                }

            }
        }

        // Log.d("Check: ",
        // "chk: intArrElipsePosition"+intArrElipsePosition.length +
        // " noOfPixelsInEllipse: "+noOfPixelsInEllipse);

        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);
                // sir[0] = p>>16;
                // sir[1] = p>>8;
                // sir[2] = p;
                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];
                }
                // radius = radius + 1;
            }
            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);
                    //
                    // sir[0] = p>>16;
                    // sir[1] = p>>8;
                    // sir[2] = p;

                    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);

        for (int k = 0; k < width * height; k++) {
            // Log.d(TAG, "PIXEL FOUND "+overlayBmp[k]);

            overlayBmp[k] = Color.argb(0x000000,
                    Color.red(pix[currPosition]),
                    Color.green(pix[currPosition]),
                    Color.blue(pix[currPosition]));

        }

        // /// update pixels in blurred array with the pixels picked from
        // original pixels intersecting the ellipse region ///
        for (int tmpEllipsePixel = 0; tmpEllipsePixel < noOfPixelsInEllipse; tmpEllipsePixel++) {
            // pix[intArrEllipsePosition[tmpEllipsePixel]] =
            // intArrEllipseData[tmpEllipsePixel];
            overlayBmp[intArrEllipsePosition[tmpEllipsePixel]] = intArrEllipseData[tmpEllipsePixel];
        }

        // Log.d(TAG, overlayBmp+"");

        // pix[intArrEllipsePosition[tmpEllipsePixel]] =
        // intArrEllipseData[tmpEllipsePixel];
        //
        bitmap.setPixels(pix, 0, w, 0, 0, w, h);
        //
        Bitmap canvasOverlay = Bitmap.createBitmap(origBitmap.getWidth(),
                origBitmap.getHeight(), origBitmap.getConfig());
        canvasOverlay.setPixels(overlayBmp, 0, w, 0, 0, w, h);
        // canvasOverlay.setHasMipMap(true);

        //
        Canvas canvas = new Canvas(bitmap);
        canvas.drawBitmap(canvasOverlay, new Matrix(), null);

        return (bitmap);
    }

    /**
     * Fastblur.
     *
     * @param sentBitmap the sent bitmap
     * @return the bitmap
     */
    public static Bitmap fastblur(Bitmap sentBitmap) {
        int[] radius = new int[] { 1, 2, 3, 6 };
        int[] ellipseWidth = new int[] { 6, 4, 3, 2 };
        Bitmap bitmap = sentBitmap.copy(sentBitmap.getConfig(), true);
        //      Bitmap origBitmap = sentBitmap.copy(sentBitmap.getConfig(), true);

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

        int[] pix = new int[w * h];
        final int width = sentBitmap.getWidth();
        final int height = sentBitmap.getHeight();

        final float xc = width / 2;
        final float yc = height / 2;
        //      int[] opix = new int[w * h];
        //      Log.e("pix", w + " " + h + " " + pix.length);
        for (int index = 0; index < 2; index++) {
            if (radius[index] < 1) {
                return (null);
            }
            bitmap.getPixels(pix, 0, w, 0, 0, w, h);
            //      origBitmap.getPixels(opix, 0, w, 0, 0, w, h);

            final float a1 = width / ellipseWidth[index];
            final float b1 = height / 2;

            final double a1Square = Math.pow(a1, 2);
            final double b1Square = Math.pow(b1, 2);

            final double area = Math.PI * a1 * b1; // / area of Ellipse to calculate
            // no of pixels this ellipse can
            // hold //

            int[] intArrEllipsePosition = new int[(int) area];
            int[] intArrEllipseData = new int[(int) area];

            int noOfPixelsInEllipse = 0;
            int currPosition = 0;
            for (int currY = 0; currY < height; currY++) {
                for (int currX = 0; currX < width; currX++) {

                    double computeEllipseEqn = (Math.pow(currX - xc, 2) / a1Square)
                            + (Math.pow(currY - yc, 2) / b1Square); // /////
                    // computation
                    // to check if
                    // current (x,y)
                    // pixel lies in
                    // or on ellipse
                    // region///

                    if (computeEllipseEqn <= 1) {

                        currPosition = (currY * width) + currX + 1; // // mapping
                        // between
                        // current x,y
                        // pixel wrt
                        // pixel array
                        // ///
                        intArrEllipsePosition[noOfPixelsInEllipse] = currPosition;

                        // if (computeEllipseEqn > 0.90) {
                        // // Log.d("PIX ", "" + computeEllipseEqn);
                        // intArrEllipseData[noOfPixelsInEllipse] = Color.argb(0x26,
                        // Color.red(pix[currPosition]),
                        // Color.green(pix[currPosition]),
                        // Color.blue(pix[currPosition]));// pix[currPosition];
                        // }
                        // else if (computeEllipseEqn > 0.70 && computeEllipseEqn <
                        // 0.90) {
                        // // Log.d("PIX 0.70", "" + computeEllipseEqn);
                        // intArrEllipseData[noOfPixelsInEllipse] = Color.argb(0x10,
                        // Color.red(pix[currPosition]),
                        // Color.green(pix[currPosition]),
                        // Color.blue(pix[currPosition]));// pix[currPosition];
                        // }
                        // else if (computeEllipseEqn > 0.65 && computeEllipseEqn <
                        // 0.70) {
                        // // Log.d("PIX 0.70", "" + computeEllipseEqn);
                        // intArrEllipseData[noOfPixelsInEllipse] = Color.argb(0x10,
                        // Color.red(pix[currPosition]),
                        // Color.green(pix[currPosition]),
                        // Color.blue(pix[currPosition]));// pix[currPosition];
                        // }
                        // else if (computeEllipseEqn > 0.63 && computeEllipseEqn <
                        // 0.65) {
                        // // Log.d("PIX 0.70", "" + computeEllipseEqn);
                        // intArrEllipseData[noOfPixelsInEllipse] = Color.argb(0x01,
                        // Color.red(pix[currPosition]),
                        // Color.green(pix[currPosition]),
                        // Color.blue(pix[currPosition]));// pix[currPosition];
                        // }
                        // else
                        // {
                        intArrEllipseData[noOfPixelsInEllipse] = pix[currPosition];
                        // }

                        // intArrEllipseData[noOfPixelsInEllipse] =
                        // intArrEllipseData[noOfPixelsInEllipse] = Color.argb(0x00,
                        // Color.red(pix[currPosition]),
                        // Color.green(pix[currPosition]),
                        // Color.blue(pix[currPosition]));
                        noOfPixelsInEllipse++;
                    }

                }
            }

            int wm = w - 1;
            int hm = h - 1;
            int wh = w * h;
            int div = radius[index] + radius[index] + 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[index] + 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[index]; i <= radius[index]; i++) {
                    p = pix[yi + Math.min(wm, Math.max(i, 0))];
                    sir = stack[i + radius[index]];
                    sir[0] = (p & 0xff0000) >> 16;
                    sir[1] = (p & 0x00ff00) >> 8;
                    sir[2] = (p & 0x0000ff);
                    // sir[0] = p>>16;
                    // sir[1] = p>>8;
                    // sir[2] = p;
                    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];
                    }
                    // radius = radius + 1;
                }
                stackpointer = radius[index];

                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[index] + div;
                        sir = stack[stackstart % div];

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

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

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

                        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[index] * w;
                for (i = -radius[index]; i <= radius[index]; i++) {
                    yi = Math.max(0, yp) + x;

                    sir = stack[i + radius[index]];

                    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[index];
                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[index] + 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;

                    }
                }
            }

            for (int tmpEllipsePixel = 0; tmpEllipsePixel < noOfPixelsInEllipse; tmpEllipsePixel++) {
                pix[intArrEllipsePosition[tmpEllipsePixel]] = intArrEllipseData[tmpEllipsePixel];
                // overlayBmp[intArrEllipsePosition[tmpEllipsePixel]] =
                // intArrEllipseData[tmpEllipsePixel];
            }

            bitmap.setPixels(pix, 0, w, 0, 0, w, h);
        }
        return (bitmap);
    }

    /**
     * Copy.
     *
     * @param in the in
     * @param out the out
     * @throws IOException Signals that an I/O exception has occurred.
     */
    private static void copy(InputStream in, BufferedOutputStream out)
            throws IOException {
        int byte_;
        while ((byte_ = in.read()) != -1)
            out.write(byte_);
    }
}

Related

  1. blur(Bitmap bitmap)
  2. blur(int[] in, int[] out, int width, int height, int radius)
  3. createBlurredBitmap(final Bitmap sentBitmap)
  4. fastblur(Bitmap sentBitmap, int radius)
  5. blur(Context context, Bitmap sentBitmap)
  6. blur(Context context, Bitmap sentBitmap, int radius)
  7. fastBlurFromView(Context context, View v, int radius)