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| EXHIBITS |
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| Évora |
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| Member’s Exhibit |
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| John Cody |
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| Poster Session |
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| Isabel Catalão |
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| Sagres |
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| Oceans |
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| Lisbon |
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| Scientific Illustration |
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| Medical Illustration |
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| Guild of Natural Science Illustrators GNSI 2000 Portugal: International Conference & Annual Meeting July 30 - August 07 2000 in Évora, Lisboa and Sagres, Portugal. |
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2000 © Theophilus Britt Griswold
The .JPG and .GIF file formats create reduced file size for quick transmission by throwing out information from the original image. The proper degree of compression makes a good monitor image, but compression artifacts are enhanced in print media, again limiting the usefulness of the image. Use JPG settings of 30% to 50%, and GIF color palettes with 16 to 32 adaptive colors. Greyscale and black & white GIF images need only 8-16 colors of grey for screen presentation. The use of a limited greyscale palette can significantly reduce file size where there are large areas of flat color such as pen and ink drawings with a white background.
Shortcomings:
While JPG and GIF artifacts reproduction quality/size in print, images can still be displayed on the web by web pirates.
| Examine the images below. Decide which image is still acceptable at the smallest possible size. Then clicked on it to see its true quality close up. Notations show:
file format: compression setting or colors in palette |
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| JPEG: 5 of 12 4.7 KB |
JPEG: 3 of 12 4.0 KB |
JPEG: 1 of 12 3.5 KB |
GIF: Web safe Color(216) / diffusion 5.8 KB |
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| GIF: 32 Colors adaptive color / diffusion 4.1 KB |
GIF: 24 Colors adaptive color / diffusion 3.6 KB |
GIF: 24 Colors adaptive color / no diffusion 3.1 KB |
GIF: 16 Colors adaptive color / diffusion 3.0 KB |
| Watermarking and Scarring > | ||
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Copyright © 2000 GNSI - Guild of Natural Science Illustrators - All rights reserved.
Last Updated: Nov. 26, 2000.