java图像处理实例

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1、一读取bmp图片数据// 获取待检测图像 ，数据保存在数组nData[]，nB[] ，nG[] ，nR[]中 public voidgetBMPImage(Stringsource)throwsException{                  clearNData();                       //清除数据保存区        FileInputStreamfs=null;              try{           fs=newFileInputStream(source);           intbfLen=14;        

2、   bytebf[]=newbyte[bfLen];           fs.read(bf,0,bfLen);//读取14字节BMP文件头           intbiLen=40;           bytebi[]=newbyte[biLen];           fs.read(bi,0,biLen);//读取40字节BMP信息头           //源图宽度           nWidth=(((int)bi[7]&0xff)<<24)                   

3、(((int)bi[6]&0xff)<<16)               

4、    

5、(((int)bi[5]&0xff)<<8)

6、(int)bi[4]&0xff;           //源图高度           nHeight=(((int)bi[11]&0xff)<<24)                   

7、(((int)bi[10]&0xff)<<16)                   

8、(((int)bi[9]&0xff)<<8)

9、(int)bi[8]&0xff;           //位数           nBitCount=(((int)bi[15]&0xff)<<8)

10、(int)bi[14]&0xff;       

11、    //源图大小           intnSizeImage=(((int)bi[23]&0xff)<<24)                   

12、(((int)bi[22]&0xff)<<16)                   

13、(((int)bi[21]&0xff)<<8)

14、(int)bi[20]&0xff;           //对24位BMP进行解析           if(nBitCount==24){               intnPad=(nSizeImage/nHeight)-nWidth*3;               nData=

15、newint[nHeight*nWidth];               nB=newint[nHeight*nWidth];               nR=newint[nHeight*nWidth];               nG=newint[nHeight*nWidth];               bytebRGB[]=newbyte[(nWidth+nPad)*3*nHeight];               fs.read(bRGB,0,(nWidth+nPad)*3*nHeight);               intnIndex=0;    

16、           for(intj=0;j

17、(((int)bRGB[nIndex+2]&0xff)<<16)                                

18、(((int)bRGB[nIndex+1]&0xff)<<8)               

19、                

20、(int)bRGB[nIndex]&0xff;                                            nB[nWidth*(nHeight-j-1)+i]=(int)bRGB[nIndex]&0xff;                       nG[nWidth*(nHeight-j-1)+i]=(int)bRGB[nIndex+1]&0xff;                       nR[nWidth*(nHeight-j-1