| 摘要 |
<p>A computer graphics system for generating a pixel value for a pixel in an image, the pixel being representative of a point in a scene as recorded on an image plane of a simulated camera, the computer graphics system comprising a sample point generator configured to generate a set of sample points representing at least one simulated element of the simulated camera, the simulated camera being provided with a simulated shutter and a simulated lens, the sample points representing elements of a Hammersley sequence, the sample point generator being configured to generate sample position points x i representing jittered sample point positions on a subpixel grid for at least one pixel on the image plane, the sample point generator being further configured to generate, for at least one sample point position on a subpixel for at least one pixel on the image plane, sample time points t ij representing "j" points in time during a time interval t 0 to t o +T during which the shutter is to be open for use by the function evaluator in evaluating the selected function, the sample point generator being further configured to generate, for at least one sample point position and at least one sample time point, sample lens position points y i,j,k representing "k" points on the lens; and a function evaluator configured to generate at least one value representing an evaluation of said selected function at one of the sample points generated by said sample point generator, the value generated by the function evaluator corresponding to the pixel value.</p> |
