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Image format conversion with transparency color adjustment

  • US 6,211,881 B1
  • Filed: 08/12/1998
  • Issued: 04/03/2001
  • Est. Priority Date: 05/13/1998
  • Status: Expired due to Term
First Claim
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1. A method for converting a source image file having a first image format to a target image having a second image format, the method comprising the acts of:

  • (a) determining whether the source image file having the first image format uses at least one transparent portion;

    (b) receiving a color table from the source image file;

    (c) identifying a transparent color for the at least one transparent portion from the color table;

    (d) determining a replacement transparent color for use with the target image having the second image format;

    (e) modifying the color table by substituting the replacement transparent color for the transparent color; and

    (f) thereafter converting the source image file having the first image format to the target image file having the second image format in accordance with the modified color table.

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