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Q: What is the 'Transparency Tolerance' setting?
A: Metrix 1.5 introduced the ability for a user to add a low res jpeg, gif, or png file to a product page for display in the layout view. One of the key purposes of this functionality is to assist the manual positioning of nested non-rectangular products. When manually nesting it helps for a user to be able to see the shape of each product, so the background of the graphic file needs to be rendered transparently. The user can nominate a color to be rendered transparent when they select the graphic file. This sounds simple enough but there's a small hitch. Due to file compression limitations all background pixels will probably not be exactly the same. To get around this Metrix actually makes a range of colors similar to the selected color transparent, and the Transparency Tolerance setting determines the size of the range. The Transparency Tolerance setting specifies the range of the red, green, and blue (RGB) values, either side of the selected color's values, to be rendered transparent. For instance, let's assume a presentation folder graphic has a white background so the user has nominated white to be transparent. Pure white has the following pixel values - R 255, G 255, B 255, but for this example the user may select a transparent color of R 235, G 235, B 235. With a tolerance of +/- 20 all pixels within the following range will be rendered transparent: R 215 to 255, G 215 to 255, B 215 to 255. |
