Patent ID: 7974469

Claim:
An image processing apparatus comprising: an image data obtaining circuit that obtains image data having first image data and second image data of a lower resolution than the first image data, the image data being capable of having a first number of grayscale values; a sampling circuit that samples the image data; a statistic value determining circuit that determines a statistic value based on statistic information of a histogram, the histogram being created by quantizing the sampled image data into a second number of grayscale values less than the first number of grayscale values and linearly interpolating the quantized data back into the first number of grayscale values; a correction-amount determining circuit that determines a first correction amount to be used for image processing to the first image data and a second correction amount to be used for image processing to the second image data based on the statistic value; and an image processing circuit that performs the image processing to the first image data according to the first correction amount and performs the image processing to the second image data according to the second correction amount.