1. An image generating method, comprising: determining a first function associated with a brightness distribution of one or more visual fields of a two-dimensional (2D) panel image; determining a second function associated with a distribution of brightness of a panel image pixel based on distance from the panel image pixel; and predicting a three-dimensional (3D) image based on a convolution operation between 3D samples of the panel image and a convolution kernel, wherein the convolution kernel is determined based on the first function and the second function, and wherein the 3D samples of the panel image are determined by sampling pixels for each visual field.