LCD PANEL IMAGE QUALITY INSPECTION SYSTEM AND LCD IMAGE PRESAMPLING METHOD

The contrast of an LCD panel is accurately measured with a small number of CCD pixels when measuring the LCD panel using a CCD camera. Therefore, a CCD area sensor is used in the CCD camera in this invention. An LCD driver section displays a calibration pattern or test patterns on the LCD panel to be inspected. An image measuring section performs A/D conversion on the contrast detected by the CCD pixels, and a CCD address setting means of the LCD pixels specifies the positions of the LCD pixels and the positions of the corresponding CCD pixels using luminescent spots of a calibration pattern. The address setting means determines the sampling addresses of each of the LCD pixels from the addresses of the luminescent spots using real number calculations. A presampling processing means converts the measured image to an image with the same number of pixels as the pattern on the LCD panel by means of linear interpolation.