Loading patent…
AssigneeKonica Minolta Business Solutions U.S.A., Inc.
InventorJunchao Wei
Estimating the term…
In a color to grayscale image conversion particularly method suitable for processing color document images such as forms, the color image is analyzed to determined which of the red, green and blue channels are the most dominant, second most dominant, and least dominant channels, based on the amount of information contained in each channel. Then, coefficients are assigned to the three channels, where the coefficient for the most dominant channel is smaller than the coefficient for the second most dominant color channel, which is in turn smaller than the coefficient for the least dominant color channel. The grayscale pixel value is then calculated using a linear combination of the red, green and blue pixel values weighted by their assigned coefficients. In one example, the ratio of the coefficients for the least dominant, the second most dominant and the most dominant channels is 10:3:1.
A method for processing a color document image, the color document image containing red, green and blue color channels, the method comprising:
A method for processing a color document image, the color document image containing red, green and blue color channels, the method comprising:
A computer program product comprising a non-transitory computer readable storage medium having a computer readable program code embedded therein for controlling a data processing apparatus, the computer readable program code configured to cause the data processing apparatus to execute a process for processing a color document image, the color document image containing red, green and blue color channels, the process comprising:
Dependencies are inferred from the claim text.