The JPG image format is probably the best format available for photographs, because it compresses photos and other images so well. It is the most widely used image format for digital cameras. The one drawback to using JPGs is that the compression is what's called "lossy". In other words, every time you compress or "re-save" a JPG, you lose some of the quality of the original picture, which can never be recovered.
Since Images: In Context! saves a file after each operation, this can mean the loss of a lot of quality if you plan to run several filters, effects or other operations on the same file. Overcoming this issue is easy. If you plan to run multiple filters/effects on a JPG file, we recommend that you follow one of the following two procedures to maintain the quality of your image:
Option 1: Save the Image at Full JPEG Quality
When saving a JPEG file after any operation, Images: In Context! prompts you with the JPEG Save Options dialog box.
Moving the slider all the way to the right will save your JPEG file with nearly no compression. You may notice the file size of your image increase dramatically with this setting. This is normal. Perform all of your image operations with the quality setting at the maximum. When performing your final operation, move the slider to the best quality setting to balance the file-size against quality for your final output.
Option 2: Convert the image to a Bitmap
The Windows Bitmap (BMP) file format contains no compression at all. Each bit represents one pixel in the "map" of the image, hence the name bitmap. Converting your image to a bitmap will allow you to run as many filters/effects as you wish without losing any image quality due to compression. Convert that file to a BMP using the Convert To... command. When you're done performing all of your imaging operations, simply convert the image back to a JPG file with the Convert To... command, and choose a suitable image compression/quality setting.
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