Patent ID: 8559529

Claim:
A display system comprising: an image data output device which outputs image data; an image display device which displays an image corresponding to the image data; and a control device which controls the image data output device, wherein one of the control device and the image data output device has a compression rate setting unit which determines whether the image corresponding to the image data is a natural image or not and sets a compression rate for the image in accordance with a type of the image, the image data output device has an image data output unit which outputs a compressed image data acquired by compressing the image data at the compression rate set by the compression rate setting unit, and one of the control device and the image data output device further comprises an extraction unit which extracts an edge component of the image data, and the extraction unit has a numeric representation unit which performs predetermined filter processing to a luminance component of each pixel constituting the image data and numerically represents the edge component of the image data.