Image processing device and image display system

An image processing device processing image data provided from outside and outputting the image data to a hold type display device, the image processing device comprising:

• a correction processing section performing a correction process to correct a pixel value in the image data for each pixel through performing a spatial HPF (high pass filter) process on the image data in a frame to be displayed in the display device according to a magnitude of a motion vector in the image data, the HPF process allowing an overshoot region and an undershoot region to be provided in a vicinity of both ends of a changing edge portion in the image data;
• and
• a signal characteristics detection section which detects, from the image data and based on the magnitude of the motion vector, predetermined signal characteristics information to be used in the correction process,
• wherein the signal characteristics detection section detects the changing edge portion in the image data based on the magnitude of the motion vector, and detects minimum and maximum pixel values within a predetermined correction area of the pixel data as well as positions of pixels having the minimum and maximum pixel values, as the predetermined signal characteristics information, and
• wherein, when an amount of overshooting in the overshoot region is different from an amount of undershooting in the undershoot region, filter coefficients used in the HPF process are adjusted so that a ratio between the amount of overshooting and the amount of undershooting is maintained constant.

An image processing device processing image data provided from outside and outputting the image data to a hold type display device, the image processing device comprising:

• a correction processing section performing a correction process to correct a pixel value in the image data for each pixel through performing a spatial HPF (high pass filter) process on the image data in a frame to be displayed in the display device according to a magnitude of a motion vector in the image data, the HPF process allowing an overshoot region and an undershoot region to be provided in a vicinity of both ends of a changing edge portion in the image data;
• and
• a signal characteristics detection section which detects, from the image data and based on the magnitude of the motion vector, predetermined signal characteristics information to be used in the correction process,
• wherein the signal characteristics detection section detects the changing edge portion in the image data based on the magnitude of the motion vector, and detects minimum and maximum pixel values within a predetermined correction area of the pixel data as well as positions of pixels having the minimum and maximum pixel values, as the predetermined signal characteristics information,
• wherein the signal characteristics detection section performs a weighting process to weight a positive coefficient onto each pixel value according to a distance from a predetermined pixel of interest in the correction area to each pixel, prior to detection of the minimum pixel value and the position of the pixel having the minimum pixel value, and
• wherein the signal characteristics detection section performs a weighting process to weight a negative coefficient onto each pixel value according to a distance from a predetermined pixel of interest in the correction area to each pixel, prior to detection of the maximum pixel value and the position of the pixel having the maximum pixel value.

An image display system comprising:

• an image processing device processing image data provided from outside;
• and
• a hold type display device performing an image display based on processed image data outputted from the image processing device,
• wherein the image processing device includes a correction processing section performing a correction process to correct a pixel value in the image data for each pixel through performing a spatial HPF (high pass filter) process on the image data in a frame to be displayed in the display device according to a magnitude of a motion vector in the image data, the HPF process allowing an overshoot region and an undershoot region to be provided in a vicinity of both ends of the changing edge portion in the image data, and
• wherein, when an amount of overshooting in the overshoot region is different from an amount of undershooting in the undershoot region, filter coefficients used in the HPF process are adjusted so that a ratio between the amount of overshooting and the amount of undershooting is maintained constant.