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§ 16.59 - Encrypt
|Quick Reference to Scripting Command|
a=ENCRYPT("password") [password must be 8 or more characters]
|Items in CAPS are 0/1 or ranges with more options than just 0/1.|
Ranges other than 0/1 are indicated by brackets, such as [0-2].
Encrypt is an operation that will encode your image so that it cannot be visually identified. Only when the encrypt operator is used on the image with the same password again, will it become intelligible. There are 2 strong warnings to keep in mind when using this operator:
It's essential that you save encrypted images in lossless formats. If you save your image as a jpeg, for example, jpeg compression alters the data slightly to make it more compressable, this will make the image so that it can never be fully restored.
This example was taken from the top example, saved in a lossy format and decrypted
Some common lossless formats include: 32 or 24 bit versions of TIFF, TARGA, TRIM, PNG, and 24 bit BMP.
It's important to note that encrypting and decrypting are the same operation, so that if an improper password is entered, the encrypted image is further encrypted with the new password. Thus it is nessecary to decrypt the image with both the incorrect password and the proper password.
On the other hand, this allows for virtually unlimited encryption levels. The order in which the passwords are entered to decrypt is not important, just that the passwords are correct every step of the way
Encrypt Operation Dialog
§ 16.59.1 - Encrypt Controls
§ 126.96.36.199 - Trends
Operator dialog controls that have a Trend button next to them offer animation functionality. Trend allows you to set that variable over a set of frames. Each frame of the animation can be thought of as a slice of time. The trends allow you to alter some, all, or none of the variables for a particular time slice. Variables that have multiple states can be set to any of a number of values in the trend. Variables that are either on or off can only have an on or off value in the trend. You will notice that the trend graphs have equidistantly spaced vertical lines. Each of these lines represents a frame in the animation. The number of frames can be altered using Sequence controls... in the TimeLine pull down menu. Animation lengths of 100 - 999 frames will be represented with a vertical bar being 10 frames, and animation length greater than 1000 frames will have a vertical bar for every 100 frames. Click here to view more information on Trends.
§ 188.8.131.52 - Password
The password must be between 8 and 50 characters, and is case-sensitive.
This parameter functions within the TimeLine, it will accept different strings at any level. For example, the TimeLine will accept a filename or password at any frame, and that will become the current setting at any particular time and from that time unless another password is encountered.
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WinImages F/x, Morph and all associated documentation
Copyright © 1992-2007 Black Belt Systems ALL RIGHTS RESERVED Under the Pan-American Conventions
WinImages F/x Manual Version 7, Revision 6, Level A
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