Texture processing

An image processing apparatus, comprising: a pixel generation unit configured to generate parameters of pixels in stamps based on values of typical pixels in the stamps having a plurality of pixels and derivatives of the parameters characterizing the image; a plurality of calculation processing units, each performing image processing of the stamps different from each other based on the parameters of the pixels generated by said pixel generation unit; and a texture processing unit configured to perform processing related to texture data in accordance with instructions from said plurality of calculation processing units, wherein each of said plurality of calculation processing units has a plurality of calculators which perform image processing of adjacent pixels in the corresponding stamp in parallel; and said pixel generation unit supplies the parameters of the adjacent pixels in the stamp which have no dependence to each other, to said plurality of calculation processing units, respectively.