Method for processing color image records subject to misregistration

A method for processing a color image composed of pixels from a plurality of color records that are subject to misregistration, said method comprising the steps of:

• dividing the color image into a plurality of blocks, each block composed of color blocks in the respective color records;
• selecting a particular block, composed of corresponding color blocks, that meets a predetermined criterion for color neutrality, and that contains at least one of a horizontal gradient and a vertical gradient indicative of an edge suitable for correlation, said edge appearing as color edge components in each of the corresponding color blocks;
• and
• correcting the misregistration between the color records by correlating a location of the color edge components in each of the color records.

A method of processing a color image composed of pixels from a plurality of color records subject to misregistration, said method comprising the steps of:

• dividing the color image into a plurality of image blocks, each image block composed of color blocks in the respective color records;
• selecting a particular image block that passes a predetermined threshold for color neutrality, and that contains an edge that exceeds a predetermined gradient threshold;
• determining the misregistration between the color records by correlating pixel values in the color records composing the particular image block selected in the preceding step;
• and
• correcting the misregistration by shifting at least one of the color records composing the color image.

A method for processing a color image composed of pixels from a plurality of color records subject to misregistration, said method comprising the steps of:

• dividing each color record into a plurality of subsections;
• automatically selecting a subsection of one record according to a selection criteria based at least in part on a color neutrality test;
• performing a correlation operation relative to the selected subsection to determine the amount of shift in a second record needed to minimize registration error between the two records;
• and
• shifting the second record by said amount of shift.

A method for processing a color image composed of pixels from a plurality of color records subject to misregistration, said method comprising-the steps of:

• dividing each color record into a plurality of subsections;
• automatically selecting a subsection of one record according to a selection criteria based on at least one of a horizontal gradient and a vertical gradient test;
• performing a correlation operation relative to the selected subsection to determine the amount of shift in a corresponding subsection of a second record needed to minimize registration error between the two subsections;
• and
• shifting all of the subsections of the second record by said amount of shift.