The following is a summary of the LuraWave Encode Options.
Image Quality: |
Select one of the following:
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File Types: |
Select one of the following:
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Password Protection: |
Select one of the following:
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Save these settings as default: |
Select to save the settings for use the next time you open LuraWave. Click Reset all to reset to the system defaults. |
Quality: |
Set the value to a number between 1 and 100. Lower quality values give a high compression ratio but poor image quality. A high value will give poor compression but good image quality. A value of 100 will perform lossless compression. Values in the range of 50 to 100 are ideal. |
Maximum File Size: |
When the image must be compressed to fit a fixed file size (eg. a floppy disk) the maximum file size option can be used. The selected amount of disk space (in kilobytes) is the maximum limit for the size of the compressed image. |
Compression Ratio: |
Specify an exact compression ratio. The resulting file size will be equal to the size of the uncompressed data divided by the chosen rate. Images compressed with ratios up to 1:10 appear almost lossless. Photo-realistic images can be compressed to 1/20th of the original file size without any significant loss of quality. For Internet presentation, compression ratios between 1:50 up to 1:100 are recommended. Higher compression ratios up to 1:1000 can be used when image quality is not very important. |
The encryption is guaranteed to work with all applications that can display LuraWaveŽ compressed images.
To enter a password:
Select Use Software Key.
Type a password in the Key field.
Type a number in the Quality Without Key field. This number represents the percentage of the original image that is unaltered before a password is entered.
Lossless compression: refers to data compression techniques where no data is lost (eg. PKZIP). For most types of data, lossless compression techniques will reduce the space needed by about 50%. For greater compression, a lossy compression technique should be used, but only certain types of data (graphics, audio, and video) can tolerate this compression. You must use a lossless compression technique when compressing data and programs.
Lossy compression: refers to data compression techniques where some data is lost. Lossy compression attempts to eliminate redundant or unnecessary information. Most video compression technologies (like MPEG), use this technique.