On the following slides some examples from various digital library pages are shown These examples show that the traditional compression techniques are.

On the following slides some examples from various digital library pages are shown

These examples show that the traditional compression techniques are not suitable for the presentation of scanned documents on WWW

Advanced Techniques in Processing ImagesAdvanced Techniques in Processing ImagesChapter Chapter 66. . Slide Slide 66

The JPEG compression

technique has been used. The

artifacts are clearly seen

when the image is magnified

Advanced Techniques in Processing ImagesAdvanced Techniques in Processing ImagesChapter Chapter 66. . Slide 8Slide 8

• Here the quality of the presentation is much better, at the

expense of the large amount of data

stored in the JPEG file. However the

blocking artifacts are clearly seen.

Here GIF format was used . In

order to decrease the file size, low resolution was chosen. This

results in a very poor quality of

the presentation.

TEST IMAGE USED FOR THE COMPARISONS OF THE EFFICIENCY OF DIFFERENT FORMATS ( SIZE 25 MB )

TEST IMAGE COMPRESSED USING JPEG ( SIZE 200 KB).

THE QUALITY IS VERY POOR, COLORS HAS BEEN CHANGED AND BLOCKING ARTIFACTS ARE VISIBLE

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