Patent ID: 8139268

Claim:
An image processing apparatus comprising: a reading unit constructed to read a color document using sensors for two color components; and a generation unit constructed to generate monochrome image data by performing a color conversion process on color image data having two color components obtained from the reading unit, wherein the color conversion process generates the monochrome image data by processing the color image data made up of two color components using a Look-Up Table that outputs one-dimensional output data for two-dimensional input data that has been combined in accordance with a predetermined rule, and wherein the data of each of the two color components are compared to a threshold, and in the case where the data of the two color components are not greater than the threshold, the data of the two color components are blended using a specific ratio and the blended one-dimensional data is output from the Look-Up Table, whereas in the case where the data of either of the two color components is greater than the threshold, the data of the two color components are compared to each other, the ratio of the lower data is increased, blending is performed, and the blended one-dimensional data is output from the Look-Up Table.