American Audio DCD-PRO240 User Manual Page 104

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Freeway Reference: Working with Graphics
104
104
6. The original poster includes some areas of text. These will benefit from different compression settings to the Robot. Draw some new
graphic boxes over parts of the words “With Working Laser!” (taking care not to overlap the boxes making up the Robot), and set
their compression to 75% JPEG. These two image portions will compress using these settings.
7. Selecting the main image, we can drastically reduce the JPEG image quality. Adjust the Quality slider until the best trade-off
between image quality and file size is made. We’ve settled on JPEG at 20% quality.
8. Finally, we will apply some GIF compression settings to the poster’s main heading. We have done this because the original image has
some blurring. The lower number of colors available for GIF won’t be that obvious, and a JPEG may suffer from some fuzziness.
This screen shot
shows the boxes
used to slice and
optimize the
Robot poster.
Above right
you can see a
comparison
between sliced
and non-sliced
images.
Above left is part of the final optimized image, compared with the same
image using a 20% JPEG output setting. Note the blocky artifacts in the
Robot, and the noisier heading quality.
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