Image processing device for resolution conversion

Details Image processing device for resolution conversion Image processing device for resolution conversion

G - Physics

06

T

G06T 3/40 (2006.01) H04N 1/40 (2006.01) H04N 1/405 (2006.01) G06F 15/62 (1990.01)

Patent

CA 2091809

ABSTRACT OF THE DISCLOSURE An image processing device for effecting resolution conversion includes an image signal memory 1 for storing the input pixel Ixy, and an enlargement/reduction calculator circuit 2 for calculating a grey level Gxy of each output pixel corresponding to the average of the areas of input pixel intersecting with the output pixel. The error occurring upon quantization by a quantizer 4 is calculated by an error calculator 5, and, after being delayed by one pixel by an error memory 6, is fed back to a image signal compensator circuit 3 to be added to the grey level S3 to obtain the compensated gray level S4, which is quantized by the quantizer 4 to obtain the quantized level Oxy.

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