This image is a half-scale, interlaced, RGBA-palette (8-bit) PNG. Click on it to download the full-size original, which is a 32-bit RGBA PNG (960 x 860, 1.6 MB).
Title: IceAlpha Author: Pieter S. van der Meulen Description: The original image comes from a slide I took in 1991 and was scanned to PhotoCD. The alpha channel was created by converting it to a grayscale image. Gamma correction was applied to lessen the transparency of the ice. A photo-fill program (with varying similarity and soft edges settings) was used to make the sky fully transparent. Manual editing was done to make "white" ice/snow parts opaque. URL: http://www.geocities.com/Yosemite/7147/nationalparks.html for the original PhotoCD image; http://www.libpng.org/pub/png/ for the PNG home site. Copyright: Copyright 1999 Pieter S. van der Meulen. This image, including the alpha channel, may be used, edited and reproduced freely. Software: pnmtopng 2.37.2
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Copyright © 1999-2009 Greg Roelofs.