The present invention relates to a prediction coefficient computing device and method, an image data computing device and method, a program, and a recording medium which make it possible to accurately correct blurring of an image. A blur adding unit 11 adds blur to parent image data on the basis of blur data of a blur model to generate student image data. A tap constructing unit 17 constructs an image prediction tap from the student image data. A prediction coefficient computing unit 18 computes a prediction coefficient for generating image data corresponding to the parent image data, from image data corresponding to the student image data, on the basis of the parent image data and the image prediction tap. The present invention can be applied to an image processing device.