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			All class groups	>	Search tags: BMP

	1. BmpCrypt

Supplied by: Chao-Chyuan Shih <e-mail contact>

Encrypt and decrypt data hidden in bitmap image

BmpCrypt is a class that uses the steganography technique to hide encrypted data within a bitmap image (.BMP).

This class can hide the data very well in 24 or 32 bit RGB images.

The class could be used to hide the data in indexed color images, for instance of 256 colors, but that would require adding a few functions to deal with the modifications to the color palette.

This class implements 4 levels of bit stream encoding. Each level uses an increasing number of bits per each byte in the RGB pixel table. Therefore, the higher level of encoding will hold more bytes of data in the bitmap image.

The class comes with a Web base example that shows how to decrypt an encrypted JPEG out of a BMP file and displays the output image.

There is also an example script that shows how to use the class to encrypt and decrupt data from the command line.

Ratings	Utility	Consistency	Documentation	Examples	Tests	Videos	Overall	Rank
All time:	`Good (91.7%)`	`Good (91.7%)`	`Good (91.7%)`	`Good (83.3%)`	`-`	`-`	`Sufficient (72.5%)`	127
Month:	Not yet rated by the users

	2. Write On Pic

Supplied by: Nabi KaramAliZadeh <e-mail contact>

Write text on a picture

This class can be used to write text on a picture.

It can open an picture file in the GIF, PNG, JPEG and BMP formats, and write a given text string on the picture.

The colors, opacity, border effect, font size and position of the text are configurable parameters.

The resulting image with the text on it may be stored on a file or served as the current script output in the same set of possible formats as the input picture.

Ratings	Utility	Consistency	Documentation	Examples	Tests	Videos	Overall	Rank
All time:	`Good (95.8%)`	`Good (91.7%)`	`-`	`Good (87.5%)`	`-`	`-`	`Sufficient (65.8%)`	419
Month:	Not yet rated by the users

	3. Gallery generator

Supplied by: Alf-Red <e-mail contact>

Generate a gallery from images in a folder

This class can be used to generate a gallery of pictures from image files contained in a given server folder.

It scans a given folder to list the files with GIF, PNG, JPEG and BMP extensions. Then it outputs HTML pages showing thumbnails of the images that were found. The full size images are opened in pop-up windows.

The width of the gallery pages, the number of images per row and the number of images per page are configurable.

The gallery shows buttons to advance to the next or previous pages.

Ratings	Utility	Consistency	Documentation	Examples	Tests	Videos	Overall	Rank
All time:	`Good (83.3%)`	`Good (80.6%)`	`-`	`Good (80.6%)`	`-`	`-`	`Not sure (57.8%)`	1004
Month:	Not yet rated by the users

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