ColorMatrix的使用

来源：互联网发布：杭州雅思考试知乎编辑：程序博客网时间：2024/05/22 19:10

花了二天的时间，自己写了一个Colormatrix的工具类，实现了一个美图秀秀效果。下面的几个算法我也不是很清楚，很敬佩那些研究算法的大牛们!

public class ImageHelper {    public static Bitmap HandleImageEffect(Bitmap bitmap,float hue,float saturate,float lum){        Bitmap newBitmap =  Bitmap.createBitmap(bitmap.getWidth(),bitmap.getHeight(), Bitmap.Config.ARGB_8888);        //创建画布        Canvas canvas  = new Canvas(newBitmap);        //创建画笔        Paint  paint  = new Paint(Paint.ANTI_ALIAS_FLAG);        //拿到ColorMatrix的对象         ColorMatrix hueMatrix  =  new ColorMatrix();        //设置色调，0代表红色，1代表绿色，2代表蓝色        hueMatrix.setRotate(0,hue);        hueMatrix.setRotate(1,hue);        hueMatrix.setRotate(2,hue);        ColorMatrix saturateMatrix  =  new ColorMatrix();        //设置饱和度        saturateMatrix.setSaturation(saturate);        ColorMatrix lumMatrix  =  new ColorMatrix();        //设置亮度        lumMatrix.setScale(lum,lum,lum,1);        ColorMatrix ImageMatrix  =  new ColorMatrix();        //将3个一起使用        ImageMatrix.postConcat(hueMatrix);        ImageMatrix.postConcat(saturateMatrix);        ImageMatrix.postConcat(lumMatrix);        paint.setColorFilter(new           ColorMatrixColorFilter(ImageMatrix));        canvas.drawBitmap(bitmap,0,0,paint);        return  newBitmap;    }

  //下面3个小Demo通过改变像素点，来实现效果  //底片效果    public static Bitmap handleNegative(Bitmap bm){        int width = bm.getWidth();        int height = bm.getHeight();        int color;        int r,g,b,a;        //原来照片的像素        int oldPix[] = new int[width*height];        //新生成的像素        int newPix[] = new int[width*height];        //创建新的位图，注意:传进来的位图参数不能更改        Bitmap bitmap  = Bitmap.createBitmap( width,height,  Bitmap.Config.ARGB_8888);        //得到原图的像素点        bm.getPixels(oldPix,0,width,0,0,width,height);        for (int i = 0; i < width*height; i++) {            color=oldPix[i];            //得到总像素点的红色像素点分量            r = Color.red(color);             //得到总像素点的绿色像素点分量            g= Color.green(color);             //得到总像素点的蓝色色像素点分量            b = Color.blue(color);             //得到总像素点的透明像素点分量            a = Color.alpha(color);             //底片效果的算法            r = 255-r;            g = 255-g;            b = 255-b;           //保证每个像素点在0-255之间            if(r>255){                r=255;            }else if(r<0){                r =0;            }            if(g>255){                g=255;            }else if(g<0){                g=0;            }            if(b>255){                b=255;            }else if(b<0){                b =0;            }            newPix[i]  = Color.argb(a,r,g,b);        }     bitmap.setPixels(newPix,0,width,0,0,width,height);        return  bitmap;    }   //复古    public static Bitmap handleImagePixelsOldPhoto(Bitmap bm) {        int width = bm.getWidth();        int height = bm.getHeight();        int color;        int r,g,b,a,r1,g1,b1,a1;        int oldPix[] = new int[width*height];        int newPix[] = new int[width*height];        Bitmap bitmap  = Bitmap.createBitmap( width,height,  Bitmap.Config.ARGB_8888);        bm.getPixels(oldPix,0,width,0,0,width,height);        for (int i = 0; i < width*height; i++) {            color=oldPix[i];            r = Color.red(color);            g= Color.green(color);            b = Color.blue(color);            a = Color.alpha(color);         //复古的算法            r1 = (int) (0.393 * r + 0.769 * g + 0.189 * b);            g1 = (int) (0.349 * r + 0.686 * g + 0.168 * b);            b1 = (int) (0.272 * r + 0.534 * g + 0.131 * b);            if(r1>255){                r1=255;            }else if(r1<0){                r1 =0;            }            if(g1>255){                g1=255;            }else if(g1<0){                g1=0;            }            if(b1>255){                b1=255;            }else if(b1<0){                b1 =0;            }            newPix[i]  = Color.argb(a,r1,g1,b1);        }        bitmap.setPixels(newPix,0,width,0,0,width,height);        return  bitmap;    }    //浮雕    public static Bitmap handleImagePixelsRelief(Bitmap bm) {        Bitmap bmp = Bitmap.createBitmap(bm.getWidth(), bm.getHeight(),                Bitmap.Config.ARGB_8888);        int width = bm.getWidth();        int height = bm.getHeight();        int color = 0, colorBefore = 0;        int a, r, g, b;        int r1, g1, b1;        int[] oldPx = new int[width * height];        int[] newPx = new int[width * height];        bm.getPixels(oldPx, 0, bm.getWidth(), 0, 0, width, height);        //注意:浮雕效果图需要前一位的像素点，所以从i=1开始并不是0        for (int i = 1; i < width * height; i++) {            colorBefore = oldPx[i - 1];            a = Color.alpha(colorBefore);            r = Color.red(colorBefore);            g = Color.green(colorBefore);            b = Color.blue(colorBefore);            color = oldPx[i];            r1 = Color.red(color);            g1 = Color.green(color);            b1 = Color.blue(color);         //浮雕的算法            r = (r - r1 + 127);            g = (g - g1 + 127);            b = (b - b1 + 127);            if (r > 255) {                r = 255;            }            if (g > 255) {                g = 255;            }            if (b > 255) {                b = 255;            }            newPx[i] = Color.argb(a, r, g, b);        }        bmp.setPixels(newPx, 0, width, 0, 0, width, height);        return bmp;    }

下面是我的布局:

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:orientation="vertical"><LinearLayout  android:layout_width="match_parent"    android:layout_height="0dp"    android:layout_weight="1"  >    <ImageView        android:layout_width="0dp"        android:id="@+id/imageView1"        android:layout_height="match_parent"        android:layout_weight="1"/>    <ImageView        android:layout_width="0dp"        android:id="@+id/imageView2"        android:layout_height="match_parent"        android:layout_weight="1"/></LinearLayout>    <LinearLayout        android:layout_width="match_parent"        android:layout_height="0dp"        android:layout_weight="1"        >        <ImageView            android:id="@+id/imageView3"            android:layout_width="0dp"            android:layout_height="match_parent"            android:layout_weight="1"/>        <ImageView            android:layout_width="0dp"            android:id="@+id/imageView4"            android:layout_height="match_parent"            android:layout_weight="1"/>    </LinearLayout></LinearLayout>

布局写完之后就要通过java代码去调用我们的工具类了。

package com.yu.colormetrix;import android.app.Activity;import android.graphics.Bitmap;import android.graphics.BitmapFactory;import android.os.Bundle;import android.widget.ImageView;/** * Created by Administrator on 2016/3/31. */public class Cang extends Activity {    private ImageView imageView1;    private ImageView imageView2;    private ImageView imageView3;    private ImageView imageView4;    private Bitmap bitmap;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.cang);        //原图        imageView1= (ImageView) findViewById(R.id.imageView1);        //底片效果        imageView2= (ImageView) findViewById(R.id.imageView2);        //复古        imageView3= (ImageView) findViewById(R.id.imageView3);        //浮雕        imageView4= (ImageView) findViewById(R.id.imageView4);        bitmap = BitmapFactory.decodeResource(getResources(), R.drawable.test2);        imageView1.setImageBitmap(bitmap);        imageView2.setImageBitmap(ImageHelper.handleNegative(bitmap));        imageView3.setImageBitmap(ImageHelper.handleImagePixelsOldPhoto(bitmap)); imageView4.setImageBitmap(ImageHelper.handleImagePixelsRelief(bitmap));    }}最后我们来看一下最终的效果图,这里我们使用的是大家所熟悉的仓老师美图.![这里写图片描述](http://img.blog.csdn.net/20160331172715386)

1 0