ec43f310   
   From: nospam@null.void   
      
   On Tue, 22 Feb 2011 08:15:40 -0800, jogging wrote:   
      
   > Hi, all   
   >   Today I try to find why the captured image is not clear.   
   > I happened to find that blue channel is noisier when I open the image   
   > using photoshop and look at each channel. This is true for most of about   
   > twenty images in my computer. Why? the sensor or optical system?   
   >   
   > Best Regards   
   > Jogging   
      
   Are these images JPEG compressed?  JPEG compression is lossy and throws   
   away information based on visibility to the human eye.  The human eye has   
   far fewer short wavelength (roughly blue) cones than medium and long   
   wavelength cones (even more roughly green and red).  The eye may have   
   evolved this way because neither predators nor prey are blue, also   
   resulting in an eye where blue is significantly defocused when red and   
   green are in focus, thus higher levels of compression can be used for   
   blue without being evident to the observer.   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)