System and method for correcting aberration of lenses through which images are projected

Abstract

In a case where aberrations of a camera lens are large, and imaging-center coordinates and reading-center coordinates coincide with each other or are located in proximity to each other within an allowable range, and trimming was not effected or center trimming was not effected, correction parameters for correcting the aberrations of the camera lens and correction parameters for correcting the aberrations of a scanner lens are integrated, and the deterioration of image quality caused by the aberrations of the camera lens and the deterioration of image quality caused by the aberrations of the scanner lens are corrected simultaneously by using the integrated parameters.

1 . A system for image processing, wherein an image of a subject has been recorded onto an imaging material, said system comprising: 
 a scanning unit configured to scan said imaging material, wherein said scanning unit includes a scanning lens in which said image is projected through; and    an image processing unit configured to correct aberrations of said scanning lens.    
     
     
         2 . The system of  claim 1 , wherein said image processing unit comprises: 
 a storage unit configured to store aberration information of said scanning lens;    a correction-parameter calculating unit configured to calculate aberration correction parameters based on aberration information of said scanning lens from said storage unit;    an aberration correcting unit configured to correct said aberration of said scanning lens based on said aberration corection parameters from said correction-parameter calculating unit.    
     
     
         3 . The system of  claim 2 , wherein said image processing unit further comprises an aberration calculating unit configured to determine aberration information of said scanning lens.  
     
     
         4 . The system of  claim 3 , wherein said aberration calculating unit is configured to store said determined aberration information of said scanning lens into said storage unit.  
     
     
         5 . The system of  claim 3 , wherein said aberration calculating unit is configured to determine said aberration information of said scanning lens based on distortions of a reference image data projected through said scanning lens.  
     
     
         6 . The system of  claim 5 , wherein said storage unit is configured to store a reference image data.  
     
     
         7 . The system of  claim 2 , wherein said aberration correction parameters include distortion correction parameters, and wherein said aberration correcting unit comprises a distortion correcting unit configured to correct for distortions based on said distortion correction parameters.  
     
     
         8 . The system of  claim 7 , wherein said aberration correction parameters further include chromatic magnification aberration parameters, and wherein said aberration correcting unit further comprises first and second color chromatic magnification aberration correcting units configured to correct for chromatic magnification aberrations of first and second colors based on said chromatic magnification aberration parameters.  
     
     
         9 . A method for image processing, wherein an image of a subject has been recorded onto an imaging material, said method comprising: 
 scanning said imaging material by projecting said image through a scanning lens; and    correcting aberrations of said scanning lens.    
     
     
         10 . The method of  claim 9 , further comprising: 
 retrieving aberration information of said scanning lens from a storage unit;    calculating aberration correction parameters based on aberration information of said scanning lens;    correcting said aberration of at least said scanning lens based on said aberration corection parameters.    
     
     
         11 . The method of  claim 10 , further comprising determining aberration information of said scanning lens.  
     
     
         12 . The method of  claim 11 , further comprising storing said determined aberration information of said scanning lens into said storage unit.  
     
     
         13 . The method of  claim 10 , wherein said step of determining aberration information comprises: 
 projecting a reference image data through said scanning lens; and    determining said aberration information of said scanning lens based on distortions of said projected reference image data.    
     
     
         14 . The method of  claim 10 , wherein said aberration correction parameters include distortion correction parameters, and wherein step of correcting comprises correcting for distortions based on said distortion correction parameters.  
     
     
         15 . The method of  claim 14 , wherein said aberration correction parameters further include chromatic magnification aberration parameters, and wherein said step of correcting further comprises correcting for chromatic magnification aberrations of first and second colors based on said chromatic magnification aberration parameters.