Patent ID: 7317825
Filing Date: 2008-01-08
Classification: G06T

Abstract:
1. A computer-implemented method for intensity projection comprising: providing volume data; creating a buffer; storing in the buffer, for each ray of a previous frame, a first distance from a pixel to a maximum/minimum intensity value along a corresponding ray; storing in the buffer, for each ray of the previous frame, the maximum/minimum intensity values; casting a new ray in a following frame from the pixel, the ray having a first location retrieved from the buffer, wherein the first location is determined according to the first distance; determining, for the pixel, an estimated maximum/minimum intensity of at least one sample around the first location as an initial threshold for a second pass; performing the second pass for determining an actual maximum/minimum value along the new ray; and updating the buffer with a new location value where the actual maximum/minimum value for the next frame was determined.