At 12:07 PM 1/28/04 -0500, Hal Lane wrote:
Jim, I tried raising the maximum iterations to 10,000 as I prefer well iterated, clearly defined midgets. And true to your promise -- some of the colors changed in the center 1/4 of the image.
I assume that by "mess up the color palette" you mean that some of the image *data* changed when maxiter was increased and thus got mapped to different colors....If my assumption is right, why do those pixels change color?
The colors changed when the maxiter was increased because the 'logmap' was used with the image. When the logmap is set to zero, the 256-color palette is repeated over and over, one color per iteration band, until the maxiter is reached. Increasing the maxiter produces no change in the colors that are already on the screen. It merely adds additional rounds of the palette to the new higher-iteration features. When the logmap feature is activated, the color palette is applied only once across the entire range of iterations. The individual bands are increasingly broadened as the iteration count increases. In this case, increasing the maxiter will broaden and therefore change some of the color bands already on the screen. Jim M.