This page contains settings that control the use of JPEG within PMIO. Because thumbnail imagery is internally stored as JPEG data, this will affect the thumbnail appearance. It will also affect the output of JPEG files from the Slideshow Wizard, Web Page Wizard and Export Thumbnails command. It does not, however, affect the quality of the base thumbs.
Preferences - JPEG Page
- Encoding method allows you to choose between Standard and Progressive encoding. These options modify the way that JPEG files are stored, and therefore the way they behave when re-loaded. Standard encoding is the normal method, in which the image is loaded sequentially. Progressive encoding can be used when you expect that the image will be loaded from a slow system, for example, a web page. It enables the loader to display the image in progressively increasing quality. The advantage of this is that the user gets to see a low-quality rendition of the image relatively quickly, and can decide whether to continue looking at this image before it is even finished loading.
- Compression and image quality controls the amount of compression that the program will use when creating JPEG data. You can use the slider to set the quality, or type a number between 0 and 100 into the text box. The highest quality and largest files are obtained when you use a setting close to zero. The lowest quality and smallest files are obtained when you use a setting close to 100. You can adjust the quality and compare the two preview images to see how the setting affects the quality.
- See also:
- The Preferences Dialog