Android实现图片高斯模糊 Android实现图片高斯模糊

本文实例为大家分享了Android实现图片高斯模糊的具体代码，供大家参考，具体内容如下
原图：

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高斯模糊后：

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FastBlur.java

import android.graphics.Bitmap; /** * Description: * User: chenzheng * Date: 2017/2/22 0022 * Time: 12:22 */public class FastBlur {public static Bitmap doBlur(Bitmap sentBitmap, int radius,boolean canReuseInBitmap) {Bitmap bitmap; if (canReuseInBitmap) {bitmap = sentBitmap; } else {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]; 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; }}bitmap.setPixels(pix, 0, w, 0, 0, w, h); return (bitmap); }}

调用方法：

private void applyBlur(String filePath) {int radius = 1; //模糊程度int scaleRatio = 5; Bitmap originBitmap = BitmapFactory.decodeFile(filePath, getBitmapOption(2)); //将图片的长和宽缩小味原来的1/2Bitmap scaledBitmap = Bitmap.createScaledBitmap(originBitmap,originBitmap.getWidth() / scaleRatio,originBitmap.getHeight() / scaleRatio,false); Bitmap blurBitmap = FastBlur.doBlur(scaledBitmap, radius, true); navLayout.setBackgroundDrawable(new BitmapDrawable(blurBitmap)); }

private BitmapFactory.Options getBitmapOption(int inSampleSize){System.gc(); BitmapFactory.Options options = new BitmapFactory.Options(); options.inPurgeable = true; options.inSampleSize = inSampleSize; return options; }

【Android实现图片高斯模糊】以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持脚本之家。