Patent ID: 8711165

Claim:
An image processing apparatus comprising: an image quality improvement processing unit which is supplied with an image signal corresponding to an original image from an image supply device, executes image quality improvement processing to first image data based on the image signal and thus generates second image data; a resolution deciding unit which compares the first image data with the second image data and thus decides whether a resolution of the original image is a resolution of a high definition (HD) signal or a resolution of a standard definition (SD) signal; and a control unit which controls the image quality improvement processing unit according to the resolution of the original image decided by the resolution deciding unit and thus adjusts the image quality improvement processing, wherein the resolution deciding unit determines whether a value representing a difference between a pixel value of a pixel group near the center of an image included in the first image data and a pixel value of a pixel group near the center of an image included in the second image data exceeds a threshold value or not, and decides that the resolution of the original image is the resolution of an HD signal if the value representing the difference exceeds the threshold value, and decides that the resolution is the resolution of an SD signal if the value representing the difference does not exceed the threshold value, and the control unit controls the image quality improvement processing unit so as to use a parameter value for an HD signal if the resolution of the original image is the resolution of the HD signal, and to use a parameter value for an SD signal if the resolution of the original image is the resolution of the SD signal.