基于卷积完成简单的图片锐化效果

来源：互联网发布：cf刷烈龙软件编辑：程序博客网时间：2024/06/06 00:47

简单的卷积锐化效果的算子为：

activity：

public class ImageJAndroid3Activity extends Activity {
   ImageView sourceImage;
   ImageView destinationImage;
   int[] data;
   int width;
   int height;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        sourceImage=(ImageView) findViewById(R.id.source);
        destinationImage=(ImageView) findViewById(R.id.destination);
    }

    //边缘锐化
    public void remove(View v){
       Bitmap bitmap=BitmapFactory.decodeResource(getResources(),R.drawable.gg);
       width=bitmap.getWidth();
       height=bitmap.getHeight();
       data=new int[width*height];
       int[] outpixel=new int[width*height];
       int[] sharp={-1,-1,-1,-1,9,-1,-1,-1,-1};
       bitmap.getPixels(data, 0, width, 0, 0, width, height);
        for(int y=0;y<height;y++){
           for(int x=0;x<width;x++){
               int a=data[y*width+x]>>24&0xff;
                int sumred=0;
                int sumgreen=0;
                int sumblue=0;
                int index=0;

               for(int i=-1;i<=1;i++){
                   int newi=y+i;
                   if(newi<0 ||newi>=height){
                       newi=y;
                   }
                   for(int j=-1;j<=1;j++){
                       int newj=x+j;
                       if(newj<0 ||newj>=width){
                           newj=x;
                       }
                       int red=data[newi*width+newj]>>16&0xff;
                        int green=data[newi*width+newj]>>8&0xff;
                        int blue=data[newi*width+newj]&0xff;
                        sumred+=red*sharp[index];
                        sumgreen+=green*sharp[index];
                        sumblue+=blue*sharp[index];
                        index++;
                   }
               }
               outpixel[y*width+x]=judge(a)<<24|judge(sumred)<<16|judge(sumgreen)<<8|judge(sumblue);
           }
        }
        Bitmap newBitmap=Bitmap.createBitmap(width, height,Config.RGB_565);
        newBitmap.setPixels(outpixel, 0, width, 0, 0, width, height);
        destinationImage.setImageBitmap(newBitmap);
    }

    public int judge(int number){
       return number<0?0:((number>255?255:number));
    }

图片锐化之后的效果是：

大家可以看到图片锐化之后，图片变的更加清晰了。

参考博客来自于：http://blog.csdn.net/jia20003/article/details/7365972

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