package imageUtil;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.Bitmap.CompressFormat;
import android.graphics.Bitmap.Config;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.LinearGradient;
import android.graphics.Matrix;
import android.graphics.Paint;
import android.graphics.PixelFormat;
import android.graphics.PorterDuff.Mode;
import android.graphics.PorterDuffXfermode;
import android.graphics.Rect;
import android.graphics.RectF;
import android.graphics.Shader.TileMode;
import android.graphics.drawable.Drawable;
import android.util.Log;
public class ImageUtil {
// 放大缩小图片
public static Bitmap zoomBitmap(Bitmap bitmap, int w, int h) {
int width = bitmap.getWidth();
int height = bitmap.getHeight();
Matrix matrix = new Matrix();
float scaleWidht = ((float) w / width);
float scaleHeight = ((float) h / height);
matrix.postScale(scaleWidht, scaleHeight);
Bitmap newbmp = Bitmap.createBitmap(bitmap, 0, 0, width, height, matrix, true);
return newbmp;
}
// 将Drawable转化为Bitmap
public static Bitmap drawableToBitmap(Drawable drawable) {
int width = drawable.getIntrinsicWidth();
int height = drawable.getIntrinsicHeight();
Bitmap bitmap = Bitmap.createBitmap(width, height,
drawable.getOpacity() != PixelFormat.OPAQUE ? Bitmap.Config.ARGB_8888 : Bitmap.Config.RGB_565);
Canvas canvas = new Canvas(bitmap);
drawable.setBounds(0, 0, width, height);
drawable.draw(canvas);
return bitmap;
}
public static String SaveBitmap(Bitmap bmp, String name) {
File file = new File("mnt/sdcard/picture/");
String path = null;
if (!file.exists())
file.mkdirs();
try {
path = file.getPath() + "/" + name;
FileOutputStream fileOutputStream = new FileOutputStream(path);
bmp.compress(Bitmap.CompressFormat.JPEG, 100, fileOutputStream);
fileOutputStream.flush();
fileOutputStream.close();
System.out.println("saveBmp is here");
} catch (Exception e) {
e.printStackTrace();
}
return path;
}
public static String saveToLocal(Bitmap bm) {
String path = "/sdcard/test.jpg";
try {
FileOutputStream fos = new FileOutputStream(path);
bm.compress(CompressFormat.JPEG, 75, fos);
fos.flush();
fos.close();
} catch (FileNotFoundException e) {
e.printStackTrace();
return null;
} catch (IOException e) {
e.printStackTrace();
return null;
}
return path;
}
// 获得圆角图片的方法
public static Bitmap getRoundedCornerBitmap(Bitmap bitmap, float roundPx) {
Bitmap output = Bitmap.createBitmap(bitmap.getWidth(), bitmap.getHeight(), Config.ARGB_8888);
Canvas canvas = new Canvas(output);
final int color = 0xff424242;
final Paint paint = new Paint();
final Rect rect = new Rect(0, 0, bitmap.getWidth(), bitmap.getHeight());
final RectF rectF = new RectF(rect);
paint.setAntiAlias(true);
canvas.drawARGB(0, 0, 0, 0);
paint.setColor(color);
canvas.drawRoundRect(rectF, roundPx, roundPx, paint);
paint.setXfermode(new PorterDuffXfermode(Mode.SRC_IN));
canvas.drawBitmap(bitmap, rect, rect, paint);
return output;
}
// 获得带倒影的图片方法
public static Bitmap createReflectionImageWithOrigin(Bitmap bitmap) {
final int reflectionGap = 4;
int width = bitmap.getWidth();
int height = bitmap.getHeight();
Matrix matrix = new Matrix();
matrix.preScale(1, -1);
Bitmap reflectionImage = Bitmap.createBitmap(bitmap, 0, height / 2, width, height / 2, matrix, false);
Bitmap bitmapWithReflection = Bitmap.createBitmap(width, (height + height / 2), Config.ARGB_8888);
Canvas canvas = new Canvas(bitmapWithReflection);
canvas.drawBitmap(bitmap, 0, 0, null);
Paint deafalutPaint = new Paint();
canvas.drawRect(0, height, width, height + reflectionGap, deafalutPaint);
canvas.drawBitmap(reflectionImage, 0, height + reflectionGap, null);
Paint paint = new Paint();
LinearGradient shader = new LinearGradient(0, bitmap.getHeight(), 0, bitmapWithReflection.getHeight()
+ reflectionGap, 0x70ffffff, 0x00ffffff, TileMode.CLAMP);
paint.setShader(shader);
// Set the Transfer mode to be porter duff and destination in
paint.setXfermode(new PorterDuffXfermode(Mode.DST_IN));
// Draw a rectangle using the paint with our linear gradient
canvas.drawRect(0, height, width, bitmapWithReflection.getHeight() + reflectionGap, paint);
return bitmapWithReflection;
}
/**
* 读取资源图片
*
* @param context
* @param resId
* @return
*/
public static Bitmap readBitMap(Context context, int resId) {
BitmapFactory.Options opt = new BitmapFactory.Options();
opt.inPreferredConfig = Bitmap.Config.RGB_565;
opt.inPurgeable = true;
opt.inInputShareable = true;
// 获取资源图片
InputStream is = context.getResources().openRawResource(resId);
return BitmapFactory.decodeStream(is, null, opt);
}
/**
* 从sd卡读取图片
*
* @param path
* @return
*/
public static Bitmap readBitMap(String path) {
BitmapFactory.Options options = new BitmapFactory.Options();
options.inPreferredConfig = Config.ARGB_8888;
Bitmap bm = BitmapFactory.decodeFile(path, options);
return bm;
}
/**
* 图片旋转
*
* @param bmp
* @param degree
* @return
*/
public static Bitmap postRotateBitamp(Bitmap bmp, float degree) {
// 获得Bitmap的高和宽
int bmpWidth = bmp.getWidth();
int bmpHeight = bmp.getHeight();
// 产生resize后的Bitmap对象
Matrix matrix = new Matrix();
matrix.postRotate(degree);
Bitmap resizeBmp = Bitmap.createBitmap(bmp, 0, 0, bmpWidth, bmpHeight, matrix, true);
return resizeBmp;
}
// 图片翻转
public static Bitmap reverseBitmap(Bitmap bmp, int flag) {
float[] floats = null;
switch (flag) {
case 0: // 水平反转
floats = new float[] { -1f, 0f, 0f, 0f, 1f, 0f, 0f, 0f, 1f };
break;
case 1: // 垂直反转
floats = new float[] { 1f, 0f, 0f, 0f, -1f, 0f, 0f, 0f, 1f };
break;
}
if (floats != null) {
Matrix matrix = new Matrix();
matrix.setValues(floats);
return Bitmap.createBitmap(bmp, 0, 0, bmp.getWidth(), bmp.getHeight(), matrix, true);
}
return bmp;
}
/**
* 组合涂鸦图片和源图片
*
* @param src
* 源图片
* @param watermark
* 涂鸦图片
* @return
*/
public static Bitmap doodle(Bitmap src, Bitmap watermark, int x, int y) {
// 另外创建一张图片
Bitmap newb = Bitmap.createBitmap(src.getWidth(), src.getHeight(), Config.ARGB_8888);// 创建一个新的和SRC长度宽度一样的位图
Canvas canvas = new Canvas(newb);
canvas.drawBitmap(src, 0, 0, null);// 在 0，0坐标开始画入原图片src
canvas.drawBitmap(watermark, (src.getWidth() - watermark.getWidth()) / 2,
(src.getHeight() - watermark.getHeight()) / 2, null); // 涂鸦图片画到原图片中间位置
canvas.save(Canvas.ALL_SAVE_FLAG);
canvas.restore();
watermark.recycle();
watermark = null;
return newb;
}
/**
* 图片上写文字
*
* @param src源图片
* @param msg文字
* @param x
* @param y
* @return
*/
public static Bitmap drawText(Bitmap src, String msg, int x, int y) {
// 另外创建一张图片
Canvas canvas = new Canvas(src);
Paint paint = new Paint();
paint.setColor(Color.RED);
canvas.drawText(msg, x, y, paint);
canvas.save(Canvas.ALL_SAVE_FLAG);
canvas.restore();
return src;
}
public static Bitmap oldRemeber(Bitmap bmp) {
if (ImageCache.get("oldRemeber") != null) {
return ImageCache.get("oldRemeber");
}
// 速度测试
long start = System.currentTimeMillis();
int width = bmp.getWidth();
int height = bmp.getHeight();
Bitmap bitmap = Bitmap.createBitmap(width, height, Bitmap.Config.RGB_565);
int pixColor = 0;
int pixR = 0;
int pixG = 0;
int pixB = 0;
int newR = 0;
int newG = 0;
int newB = 0;
int[] pixels = new int[width * height];
bmp.getPixels(pixels, 0, width, 0, 0, width, height);
for (int i = 0; i < height; i++) {
for (int k = 0; k < width; k++) {
pixColor = pixels[width * i + k];
pixR = Color.red(pixColor);
pixG = Color.green(pixColor);
pixB = Color.blue(pixColor);
newR = (int) (0.393 * pixR + 0.769 * pixG + 0.189 * pixB);
newG = (int) (0.349 * pixR + 0.686 * pixG + 0.168 * pixB);
newB = (int) (0.272 * pixR + 0.534 * pixG + 0.131 * pixB);
int newColor = Color.argb(255, newR > 255 ? 255 : newR, newG > 255 ? 255 : newG, newB > 255 ? 255
: newB);
pixels[width * i + k] = newColor;
}
}
bitmap.setPixels(pixels, 0, width, 0, 0, width, height);
long end = System.currentTimeMillis();
Log.e("may", "used time=" + (end - start));
ImageCache.put("oldRemeber", bitmap);
return bitmap;
}
/**
* 模糊效果
*
* @param bmp
* @return
*/
public static Bitmap blurImage(Bitmap bmp) {
if (ImageCache.get("blurImage") != null) {
return ImageCache.get("blurImage");
}
// 速度测试
long start = System.currentTimeMillis();
int width = bmp.getWidth();
int height = bmp.getHeight();
Bitmap bitmap = Bitmap.createBitmap(width, height, Bitmap.Config.RGB_565);
int pixColor = 0;
int newR = 0;
int newG = 0;
int newB = 0;
int newColor = 0;
int[][] colors = new int[9][3];
for (int i = 1, length = width - 1; i < length; i++) {
for (int k = 1, len = height - 1; k < len; k++) {
for (int m = 0; m < 9; m++) {
int s = 0;
int p = 0;
switch (m) {
case 0:
s = i - 1;
p = k - 1;
break;
case 1:
s = i;
p = k - 1;
break;
case 2:
s = i + 1;
p = k - 1;
break;
case 3:
s = i + 1;
p = k;
break;
case 4:
s = i + 1;
p = k + 1;
break;
case 5:
s = i;
p = k + 1;
break;
case 6:
s = i - 1;
p = k + 1;
break;
case 7:
s = i - 1;
p = k;
break;
case 8:
s = i;
p = k;
}
pixColor = bmp.getPixel(s, p);
colors[m][0] = Color.red(pixColor);
colors[m][1] = Color.green(pixColor);
colors[m][2] = Color.blue(pixColor);
}
for (int m = 0; m < 9; m++) {
newR += colors[m][0];
newG += colors[m][1];
newB += colors[m][2];
}
newR = (int) (newR / 9F);
newG = (int) (newG / 9F);
newB = (int) (newB / 9F);
newR = Math.min(255, Math.max(0, newR));
newG = Math.min(255, Math.max(0, newG));
newB = Math.min(255, Math.max(0, newB));
newColor = Color.argb(255, newR, newG, newB);
bitmap.setPixel(i, k, newColor);
newR = 0;
newG = 0;
newB = 0;
}
}
long end = System.currentTimeMillis();
Log.e("blurImage()", "used time=" + (end - start));
ImageCache.put("blurImage", bitmap);
return bitmap;
}
/**
* 柔化效果(高斯模糊)(优化后比上面快三倍)
*
* @param bmp
* @return
*/
public static Bitmap blurImageAmeliorate(Bitmap bmp) {
if (ImageCache.get("blurImageAmeliorate") != null) {
return ImageCache.get("blurImageAmeliorate");
}
long start = System.currentTimeMillis();
// 高斯矩阵
int[] gauss = new int[] { 1, 2, 1, 2, 4, 2, 1, 2, 1 };
int width = bmp.getWidth();
int height = bmp.getHeight();
Bitmap bitmap = Bitmap.createBitmap(width, height, Bitmap.Config.RGB_565);
int pixR = 0;
int pixG = 0;
int pixB = 0;
int pixColor = 0;
int newR = 0;
int newG = 0;
int newB = 0;
int delta = 16; // 值越小图片会越亮，越大则越暗
int idx = 0;
int[] pixels = new int[width * height];
bmp.getPixels(pixels, 0, width, 0, 0, width, height);
for (int i = 1, length = height - 1; i < length; i++) {
for (int k = 1, len = width - 1; k < len; k++) {
idx = 0;
for (int m = -1; m <= 1; m++) {
for (int n = -1; n <= 1; n++) {
pixColor = pixels[(i + m) * width + k + n];
pixR = Color.red(pixColor);
pixG = Color.green(pixColor);
pixB = Color.blue(pixColor);
newR = newR + (int) (pixR * gauss[idx]);
newG = newG + (int) (pixG * gauss[idx]);
newB = newB + (int) (pixB * gauss[idx]);
idx++;
}
}
newR /= delta;
newG /= delta;
newB /= delta;
newR = Math.min(255, Math.max(0, newR));
newG = Math.min(255, Math.max(0, newG));
newB = Math.min(255, Math.max(0, newB));
pixels[i * width + k] = Color.argb(255, newR, newG, newB);
newR = 0;
newG = 0;
newB = 0;
}
}
bitmap.setPixels(pixels, 0, width, 0, 0, width, height);
long end = System.currentTimeMillis();
Log.d("blurImageAmeliorate", "used time=" + (end - start));
ImageCache.put("blurImageAmeliorate", bitmap);
return bitmap;
}
public static Bitmap sketch(Bitmap bmp) {
if (ImageCache.get("sketch") != null) {
return ImageCache.get("sketch");
}
long start = System.currentTimeMillis();
int pos, row, col, clr;
int width = bmp.getWidth();
int height = bmp.getHeight();
int[] pixSrc = new int[width * height];
int[] pixNvt = new int[width * height];
// 先对图象的像素处理成灰度颜色后再取反
bmp.getPixels(pixSrc, 0, width, 0, 0, width, height);
for (row = 0; row < height; row++) {
for (col = 0; col < width; col++) {
pos = row * width + col;
pixSrc[pos] = (Color.red(pixSrc[pos]) + Color.green(pixSrc[pos]) + Color.blue(pixSrc[pos])) / 3;
pixNvt[pos] = 255 - pixSrc[pos];
}
}
// 对取反的像素进行高斯模糊, 强度可以设置，暂定为5.0
gaussGray(pixNvt, 5.0, 5.0, width, height);
// 灰度颜色和模糊后像素进行差值运算
for (row = 0; row < height; row++) {
for (col = 0; col < width; col++) {
pos = row * width + col;
clr = pixSrc[pos] << 8;
clr /= 256 - pixNvt[pos];
clr = Math.min(clr, 255);
pixSrc[pos] = Color.rgb(clr, clr, clr);
}
}
bmp.setPixels(pixSrc, 0, width, 0, 0, width, height);
long end = System.currentTimeMillis();
Log.d("blurImageAmeliorate", "used time=" + (end - start));
ImageCache.put("sketch", bmp);
return bmp;
}
private static int gaussGray(int[] psrc, double horz, double vert, int width, int height) {
int[] dst, src;
double[] n_p, n_m, d_p, d_m, bd_p, bd_m;
double[] val_p, val_m;
int i, j, t, k, row, col, terms;
int[] initial_p, initial_m;
double std_dev;
int row_stride = width;
int max_len = Math.max(width, height);
int sp_p_idx, sp_m_idx, vp_idx, vm_idx;
val_p = new double[max_len];
val_m = new double[max_len];
n_p = new double[5];
n_m = new double[5];
d_p = new double[5];
d_m = new double[5];
bd_p = new double[5];
bd_m = new double[5];
src = new int[max_len];
dst = new int[max_len];
initial_p = new int[4];
initial_m = new int[4];
// 垂直方向
if (vert > 0.0) {
vert = Math.abs(vert) + 1.0;
std_dev = Math.sqrt(-(vert * vert) / (2 * Math.log(1.0 / 255.0)));
// 初试化常量
findConstants(n_p, n_m, d_p, d_m, bd_p, bd_m, std_dev);
for (col = 0; col < width; col++) {
for (k = 0; k < max_len; k++) {
val_m[k] = val_p[k] = 0;
}
for (t = 0; t < height; t++) {
src[t] = psrc[t * row_stride + col];
}
sp_p_idx = 0;
sp_m_idx = height - 1;
vp_idx = 0;
vm_idx = height - 1;
initial_p[0] = src[0];
initial_m[0] = src[height - 1];
for (row = 0; row < height; row++) {
terms = (row < 4) ? row : 4;
for (i = 0; i <= terms; i++) {
val_p[vp_idx] += n_p[i] * src[sp_p_idx - i] - d_p[i] * val_p[vp_idx - i];
val_m[vm_idx] += n_m[i] * src[sp_m_idx + i] - d_m[i] * val_m[vm_idx + i];
}
for (j = i; j <= 4; j++) {
val_p[vp_idx] += (n_p[j] - bd_p[j]) * initial_p[0];
val_m[vm_idx] += (n_m[j] - bd_m[j]) * initial_m[0];
}
sp_p_idx++;
sp_m_idx--;
vp_idx++;
vm_idx--;
}
transferGaussPixels(val_p, val_m, dst, 1, height);
for (t = 0; t < height; t++) {
psrc[t * row_stride + col] = dst[t];
}
}
}
// 水平方向
if (horz > 0.0) {
horz = Math.abs(horz) + 1.0;
if (horz != vert) {
std_dev = Math.sqrt(-(horz * horz) / (2 * Math.log(1.0 / 255.0)));
// 初试化常量
findConstants(n_p, n_m, d_p, d_m, bd_p, bd_m, std_dev);
}
for (row = 0; row < height; row++) {
for (k = 0; k < max_len; k++) {
val_m[k] = val_p[k] = 0;
}
for (t = 0; t < width; t++) {
src[t] = psrc[row * row_stride + t];
}
sp_p_idx = 0;
sp_m_idx = width - 1;
vp_idx = 0;
vm_idx = width - 1;
initial_p[0] = src[0];
initial_m[0] = src[width - 1];
for (col = 0; col < width; col++) {
terms = (col < 4) ? col : 4;
for (i = 0; i <= terms; i++) {
val_p[vp_idx] += n_p[i] * src[sp_p_idx - i] - d_p[i] * val_p[vp_idx - i];
val_m[vm_idx] += n_m[i] * src[sp_m_idx + i] - d_m[i] * val_m[vm_idx + i];
}
for (j = i; j <= 4; j++) {
val_p[vp_idx] += (n_p[j] - bd_p[j]) * initial_p[0];
val_m[vm_idx] += (n_m[j] - bd_m[j]) * initial_m[0];
}
sp_p_idx++;
sp_m_idx--;
vp_idx++;
vm_idx--;
}
transferGaussPixels(val_p, val_m, dst, 1, width);
for (t = 0; t < width; t++) {
psrc[row * row_stride + t] = dst[t];
}
}
}
return 0;
}
private static void findConstants(double[] n_p, double[] n_m, double[] d_p, double[] d_m, double[] bd_p,
double[] bd_m, double std_dev) {
double div = Math.sqrt(2 * 3.141593) * std_dev;
double x0 = -1.783 / std_dev;
double x1 = -1.723 / std_dev;
double x2 = 0.6318 / std_dev;
double x3 = 1.997 / std_dev;
double x4 = 1.6803 / div;
double x5 = 3.735 / div;
double x6 = -0.6803 / div;
double x7 = -0.2598 / div;
int i;
n_p[0] = x4 + x6;
n_p[1] = (Math.exp(x1) * (x7 * Math.sin(x3) - (x6 + 2 * x4) * Math.cos(x3)) + Math.exp(x0)
* (x5 * Math.sin(x2) - (2 * x6 + x4) * Math.cos(x2)));
n_p[2] = (2
* Math.exp(x0 + x1)
* ((x4 + x6) * Math.cos(x3) * Math.cos(x2) - x5 * Math.cos(x3) * Math.sin(x2) - x7 * Math.cos(x2)
* Math.sin(x3)) + x6 * Math.exp(2 * x0) + x4 * Math.exp(2 * x1));
n_p[3] = (Math.exp(x1 + 2 * x0) * (x7 * Math.sin(x3) - x6 * Math.cos(x3)) + Math.exp(x0 + 2 * x1)
* (x5 * Math.sin(x2) - x4 * Math.cos(x2)));
n_p[4] = 0.0;
d_p[0] = 0.0;
d_p[1] = -2 * Math.exp(x1) * Math.cos(x3) - 2 * Math.exp(x0) * Math.cos(x2);
d_p[2] = 4 * Math.cos(x3) * Math.cos(x2) * Math.exp(x0 + x1) + Math.exp(2 * x1) + Math.exp(2 * x0);
d_p[3] = -2 * Math.cos(x2) * Math.exp(x0 + 2 * x1) - 2 * Math.cos(x3) * Math.exp(x1 + 2 * x0);
d_p[4] = Math.exp(2 * x0 + 2 * x1);
for (i = 0; i <= 4; i++) {
d_m[i] = d_p[i];
}
n_m[0] = 0.0;
for (i = 1; i <= 4; i++) {
n_m[i] = n_p[i] - d_p[i] * n_p[0];
}
double sum_n_p, sum_n_m, sum_d;
double a, b;
sum_n_p = 0.0;
sum_n_m = 0.0;
sum_d = 0.0;
for (i = 0; i <= 4; i++) {
sum_n_p += n_p[i];
sum_n_m += n_m[i];
sum_d += d_p[i];
}
a = sum_n_p / (1.0 + sum_d);
b = sum_n_m / (1.0 + sum_d);
for (i = 0; i <= 4; i++) {
bd_p[i] = d_p[i] * a;
bd_m[i] = d_m[i] * b;
}
}
private static void transferGaussPixels(double[] src1, double[] src2, int[] dest, int bytes, int width) {
int i, j, k, b;
int bend = bytes * width;
double sum;
i = j = k = 0;
for (b = 0; b < bend; b++) {
sum = src1[i++] + src2[j++];
if (sum > 255)
sum = 255;
else if (sum < 0)
sum = 0;
dest[k++] = (int) sum;
}
}
/**
* 锐化效果
*
* @param bmp
* @return
*/
public static Bitmap emboss(Bitmap bmp) {
int width = bmp.getWidth();
int height = bmp.getHeight();
Bitmap bitmap = Bitmap.createBitmap(width, height, Bitmap.Config.RGB_565);
int pixR = 0;
int pixG = 0;
int pixB = 0;
int pixColor = 0;
int newR = 0;
int newG = 0;
int newB = 0;
int[] pixels = new int[width * height];
bmp.getPixels(pixels, 0, width, 0, 0, width, height);
int pos = 0;
for (int i = 1, length = height - 1; i < length; i++) {
for (int k = 1, len = width - 1; k < len; k++) {
pos = i * width + k;
pixColor = pixels[pos];
pixR = Color.red(pixColor);
pixG = Color.green(pixColor);
pixB = Color.blue(pixColor);
pixColor = pixels[pos + 1];
newR = Color.red(pixColor) - pixR + 127;
newG = Color.green(pixColor) - pixG + 127;
newB = Color.blue(pixColor) - pixB + 127;
newR = Math.min(255, Math.max(0, newR));
newG = Math.min(255, Math.max(0, newG));
newB = Math.min(255, Math.max(0, newB));
pixels[pos] = Color.argb(255, newR, newG, newB);
}
}
bitmap.setPixels(pixels, 0, width, 0, 0, width, height);
return bitmap;
}
/**
* 图片锐化（拉普拉斯变换）
*
* @param bmp
* @return
*/
public static Bitmap sharpenImageAmeliorate(Bitmap bmp) {
if (ImageCache.get("sharpenImageAmeliorate") != null) {
return ImageCache.get("sharpenImageAmeliorate");
}
long start = System.currentTimeMillis();
// 拉普拉斯矩阵
int[] laplacian = new int[] { -1, -1, -1, -1, 9, -1, -1, -1, -1 };
int width = bmp.getWidth();
int height = bmp.getHeight();
Bitmap bitmap = Bitmap.createBitmap(width, height, Bitmap.Config.RGB_565);
int pixR = 0;
int pixG = 0;
int pixB = 0;
int pixColor = 0;
int newR = 0;
int newG = 0;
int newB = 0;
int idx = 0;
float alpha = 0.3F;
int[] pixels = new int[width * height];
bmp.getPixels(pixels, 0, width, 0, 0, width, height);
for (int i = 1, length = height - 1; i < length; i++) {
for (int k = 1, len = width - 1; k < len; k++) {
idx = 0;
for (int m = -1; m <= 1; m++) {
for (int n = -1; n <= 1; n++) {
pixColor = pixels[(i + n) * width + k + m];
pixR = Color.red(pixColor);
pixG = Color.green(pixColor);
pixB = Color.blue(pixColor);
newR = newR + (int) (pixR * laplacian[idx] * alpha);
newG = newG + (int) (pixG * laplacian[idx] * alpha);
newB = newB + (int) (pixB * laplacian[idx] * alpha);
idx++;
}
}
newR = Math.min(255, Math.max(0, newR));
newG = Math.min(255, Math.max(0, newG));
newB = Math.min(255, Math.max(0, newB));
pixels[i * width + k] = Color.argb(255, newR, newG, newB);
newR = 0;
newG = 0;
newB = 0;
}
}
bitmap.setPixels(pixels, 0, width, 0, 0, width, height);
long end = System.currentTimeMillis();
Log.e("sharpenImageAmeliorate", "used time=" + (end - start));
ImageCache.put("sharpenImageAmeliorate", bitmap);
return bitmap;
}
/**
* 底片效果
*
* @param bmp
* @return
*/
public static Bitmap film(Bitmap bmp) {
// RGBA的最大值
final int MAX_VALUE = 255;
int width = bmp.getWidth();
int height = bmp.getHeight();
Bitmap bitmap = Bitmap.createBitmap(width, height, Bitmap.Config.RGB_565);
int pixR = 0;
int pixG = 0;
int pixB = 0;
int pixColor = 0;
int newR = 0;
int newG = 0;
int newB = 0;
int[] pixels = new int[width * height];
bmp.getPixels(pixels, 0, width, 0, 0, width, height);
int pos = 0;
for (int i = 1, length = height - 1; i < length; i++) {
for (int k = 1, len = width - 1; k < len; k++) {
pos = i * width + k;
pixColor = pixels[pos];
pixR = Color.red(pixColor);
pixG = Color.green(pixColor);
pixB = Color.blue(pixColor);
newR = MAX_VALUE - pixR;
newG = MAX_VALUE - pixG;
newB = MAX_VALUE - pixB;
newR = Math.min(MAX_VALUE, Math.max(0, newR));
newG = Math.min(MAX_VALUE, Math.max(0, newG));
newB = Math.min(MAX_VALUE, Math.max(0, newB));
pixels[pos] = Color.argb(MAX_VALUE, newR, newG, newB);
}
}
bitmap.setPixels(pixels, 0, width, 0, 0, width, height);
return bitmap;
}
/**
* 光照效果
*
* @param bmp
* 光照中心x坐标
* @param centerX
* 光照中心要坐标
* @param centerY
* @return
*/
public static Bitmap sunshine(Bitmap bmp, int centerX, int centerY) {
final int width = bmp.getWidth();
final int height = bmp.getHeight();
Bitmap bitmap = Bitmap.createBitmap(width, height, Bitmap.Config.RGB_565);
int pixR = 0;
int pixG = 0;
int pixB = 0;
int pixColor = 0;
int newR = 0;
int newG = 0;
int newB = 0;
int radius = Math.min(centerX, centerY);
final float strength = 150F; // 光照强度 100~150
int[] pixels = new int[width * height];
bmp.getPixels(pixels, 0, width, 0, 0, width, height);
int pos = 0;
for (int i = 1, length = height - 1; i < length; i++) {
for (int k = 1, len = width - 1; k < len; k++) {
pos = i * width + k;
pixColor = pixels[pos];
pixR = Color.red(pixColor);
pixG = Color.green(pixColor);
pixB = Color.blue(pixColor);
newR = pixR;
newG = pixG;
newB = pixB;
// 计算当前点到光照中心的距离，平面座标系中求两点之间的距离
int distance = (int) (Math.pow((centerY - i), 2) + Math.pow(centerX - k, 2));
if (distance < radius * radius) {
// 按照距离大小计算增加的光照值
int result = (int) (strength * (1.0 - Math.sqrt(distance) / radius));
newR = pixR + result;
newG = pixG + result;
newB = pixB + result;
}
newR = Math.min(255, Math.max(0, newR));
newG = Math.min(255, Math.max(0, newG));
newB = Math.min(255, Math.max(0, newB));
pixels[pos] = Color.argb(255, newR, newG, newB);
}
}
bitmap.setPixels(pixels, 0, width, 0, 0, width, height);
return bitmap;
}
}
时间： 2024-10-12 16:47:20