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我一直在尝试在android中实现框模糊算法。 该代码似乎很好,但试图应用时,模糊图像中的某些区域在模糊的照片上有大的黄色和白色污迹。 任何人都可以帮助我找出我做错了什么? 感谢:Android框模糊算法
这里是我有:
public static Bitmap boxBlur(Bitmap bmp, int range) {
assert (range & 1) == 0 : "Range must be odd.";
Bitmap blurred = Bitmap.createBitmap(bmp.getWidth(), bmp.getHeight(),
Config.ARGB_8888);
Canvas c = new Canvas(blurred);
int w = bmp.getWidth();
int h = bmp.getHeight();
int[] pixels = new int[bmp.getWidth() * bmp.getHeight()];
bmp.getPixels(pixels, 0, w, 0, 0, w, h);
boxBlurHorizontal(pixels, w, h, range/2);
boxBlurVertical(pixels, w, h, range/2);
c.drawBitmap(pixels, 0, w, 0.0F, 0.0F, w, h, true, null);
return blurred;
}
private static void boxBlurHorizontal(int[] pixels, int w, int h,
int halfRange) {
int index = 0;
int[] newColors = new int[w];
for (int y = 0; y < h; y++) {
int hits = 0;
long r = 0;
long g = 0;
long b = 0;
for (int x = -halfRange; x < w; x++) {
int oldPixel = x - halfRange - 1;
if (oldPixel >= 0) {
int color = pixels[index + oldPixel];
if (color != 0) {
r -= Color.red(color);
g -= Color.green(color);
b -= Color.blue(color);
}
hits--;
}
int newPixel = x + halfRange;
if (newPixel < w) {
int color = pixels[index + newPixel];
if (color != 0) {
r += Color.red(color);
g += Color.green(color);
b += Color.blue(color);
}
hits++;
}
if (x >= 0) {
newColors[x] = Color.argb(0xFF, (byte) (r/hits),
(byte) (g/hits), (byte) (b/hits));
}
}
for (int x = 0; x < w; x++) {
pixels[index + x] = newColors[x];
}
index += w;
}
}
private static void boxBlurVertical(int[] pixels, int w, int h,
int halfRange) {
int[] newColors = new int[h];
int oldPixelOffset = -(halfRange + 1) * w;
int newPixelOffset = (halfRange) * w;
for (int x = 0; x < w; x++) {
int hits = 0;
long r = 0;
long g = 0;
long b = 0;
int index = -halfRange * w + x;
for (int y = -halfRange; y < h; y++) {
int oldPixel = y - halfRange - 1;
if (oldPixel >= 0) {
int color = pixels[index + oldPixelOffset];
if (color != 0) {
r -= Color.red(color);
g -= Color.green(color);
b -= Color.blue(color);
}
hits--;
}
int newPixel = y + halfRange;
if (newPixel < h) {
int color = pixels[index + newPixelOffset];
if (color != 0) {
r += Color.red(color);
g += Color.green(color);
b += Color.blue(color);
}
hits++;
}
if (y >= 0) {
newColors[y] = Color.argb(0xFF, (byte) (r/hits),
(byte) (g/hits), (byte) (b/hits));
}
index += w;
}
for (int y = 0; y < h; y++) {
pixels[y * w + x] = newColors[y];
}
}
}
发现问题 - 行: newColors [X] = Color.argb(0xFF时,(**字节**)(R /次点击), (** *字节*)(g/hit),(** byte **)(b/hit)); 我将平均值转换为字节,它们应该是整数。 将其更改为: newColors [x] = Color.argb(0xFF,(** int **)(r/hit), (** int **)(g/hit),(** int ** )(b/hit)); – saarraz1
将它作为答案添加可能会很好,然后接受它只是为了解决问题。 –