Image quality prediction and control apparatus and method

摘要

An image quality control apparatus is disclosed which comprises: image division means for dividing an input image into a plurality of divided images constituted by a predetermined number of picture elements; conversion means for converting said divided images divided by said image division means into converted coefficients; image analysis means for finding a property of said divided images divided by said image division means; image output property output means for outputting a property of image output means; quantization method selection means for selecting a quantization method in response to the divided image property found by said image analysis means and the image output means property output by said image output property output means; quantization means for quantizing the conversion coefficients found by said conversion means by the quantization method selected by said quantization method selection means; and coding means for coding the conversion coefficients quantized by said quantization means.