怎样调整图像的亮度、色度、饱和度和对比度?我要代码或者可用的DLL

导读:
  八月 23rd, 2007 by admin
  谁有啊,因为我对vc不是很熟悉,所以自己不会做
   网友回答:
  发表者:sunrise
  去intel的网站看看,上面有图像处理的库。
  发表者:serenade
  //调整图像的色度、亮度、饱和度
  //作者:吴梦华 csdn上叫神曲
  //[email protected]
  //2003-3-1
  //用法:使用changehls函数,图像不能够带pitch。
  //作用和photoshop的hue/saturation操作一致,取值范围也一样。
  //要求图像为565
  //目前为止只测试过改变色度,其它若有问题可以和我联系。
  
  
  
  void changehls( word *pwimagebuf, int width, int height, int hue,
  int lig, int sat )
  {
  float liglow=0;
  float lighigh=1;
  if( lig<0 )
  lighigh = 1+lig/100.0f;
  else if( lig>0 )
  liglow = lig/100.0f;
  
  float satlow=0;
  float sathigh=1;
  if( sat<0 )
  sathigh = 1+sat/100.0f;
  else if( sat>0 )
  satlow = sat/100.0f;
  
  int index=0;
  float hls[3];
  
  word color = 0xffff;
  rgbtohls( hls, &color);
  
  for( int row=0; row  for( int col=0; col  {
  rgbtohls( hls, &pwimagebuf[index] );
  
  // change hls
  if( hls[0] != -1 )
  {
  hls[0] += hue;
  hls[0] = (float)( (int)hls[0] % 360 );
  if( hls[0]<0 ) hls[0]+=360;
  if( hls[0]>360 ) hls[0]-=360;
  hls[1] = (lighigh-liglow)*hls[1]+liglow;
  hls[2] = (sathigh-satlow)*hls[2]+satlow;
  }
  else
  hls[1] = (lighigh-liglow)*hls[1]+liglow;
  
  pwimagebuf[index] = hlstorgb( hls );
  
  index++;
  }
  }
  
  void rgbtohls( float *phls, word *prgb )
  {
  float r,g,b;
  r = ((*prgb)>>11)/31.0f;
  g = (((*prgb)&0x7e0)>>5)/63.0f;
  b = ((*prgb)&0x1f) / 31.0f;
  
  // determine the lighteness.
  float m1;
  m1 = max( r,g );
  m1 = max( m1, b );
  float m2;
  m2 = min( r,g );
  m2 = min( m2, b );
  float l = (m1+m2)/2;
  
  // determine the sat
  float s=0,h=0;
  if( m1 == m2 )
  {
  s=0;
  h=-1; // undefined.
  }
  else
  {
  if( l<= 0.5f )
  s = (m1-m2)/(m1+m2);
  else
  s = (m1-m2)/(2-m1-m2);
  
  //determine the hue
  float cr = (m1-r)/(m1-m2);
  float cg = (m1-g)/(m1-m2);
  float cb = (m1-b)/(m1-m2);
  if( r==m1) h = cb-cg;
  if( g==m1) h = 2+cr-cb;
  if( b==m1) h = 4+cg-cr;
  h = 60*h;
  if( h<0 ) h = h+360;
  }
  
  phls[0] = h;
  phls[1] = l;
  phls[2] = s;
  }
  
  word hlstorgb( float *phls )
  {
  float h = phls[0];
  float l = phls[1];
  float s = phls[2];
  float r,g,b;
  float m1,m2;
  if( l<=0.5f )
  m2 = l*(1+s);
  else
  m2= l+s-l*s;
  m1 = 2*l-m2;
  
  // check for zero saturation
  if( s== 0 )
  {
  if( h==-1 )
  r = g = b = l;
  else
  outputdebugstring( "error in hlstorgb. incorrect hls input./n" );
  }
  else
  {
  // determine the rgb
  r = subhlstorgb( (int)h+120,m1,m2 );
  g = subhlstorgb( (int)h,m1,m2 );
  b = subhlstorgb( (int)h-120,m1,m2 );
  }
  
  int r=(int)(r*255);
  int g=(int)(g*255);
  int b=(int)(b*255);
  return (r>>3<<11)|(g>>2<<5)|(b>>3);
  }
  
  float subhlstorgb( int h, float m1, float m2 )
  {
  h = h%360;
  if( h<0 ) h+= 360;
  if( h>360 ) h-=360;
  if( h<60 ) return m1+(m2-m1)*h/60;
  else if( h<180 ) return m2;
  else if( h<240 ) return m1+(m2-m1)*(240-h)/60;
  else if( h<=360 ) return m1;
  
  return 0.0f;
  }
  发表者:jiangyunfeng
  推荐:
  向世明的《数字图象处理》,很不错哦!
  发表者:robothn
  去找cximage 的源码看吧
  http://www.codeproject.com/bitmap/cximage.asp?target=cximage
  发表者:kodo
  http://asp.6to23.com/iseesoft/now.htm
  到isee网站上面去看看
  应该可以找得到的
  发表者:bruce5260
  思路你可以参考digital image processing.大概要用到直方图均衡,在那本书的前几章里头.
  发表者:happyandy
  去钩钩了!

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