Patent ID: 7840223

Claim:
An image conversion device for obtaining, based on an original image composed of a plurality of pixels, a target image composed of a same number of pixels as that of the original image and is represented by pseudo gradation, where for colors assigned to the pixels in the target image, each of n kinds of color components is represented with 2 Cn gradation levels, the n being a natural number, and the Cn being a natural number for each of the color components, the image conversion device comprising: a quantization unit operable to quantize each of the color components for the original image into 2 (Cn+1) −1 gradation values; and a color determination unit operable, for each of the pixels on a basis of a correspondence of the pixels in the original image to the pixels in the target image, to divide by two each of a quantized value resulting from the quantization and the quantized value plus one, in accordance with a position of each of the pixels, so as to obtain each quotient, and to set the quotient for each of the color components for the pixels in the target image.