The seven selections that make up the main body of the text are devoted to algebra-geometric techniques and geometric insights for finite frames; quantization, finite frames, and error diffusion
; compressed sensing and dictionary learning; and many other related subjects.
The procedures for applying AMELSBR method are Capacity Evaluation, Minimum Error Replacement and Error Diffusion. The result shows that the AMELSBR method is able to manage for hiding and restoring files without causing excessive distortion (noise) in stego image, and has a possibility of returning most files for image manipulation such as the change of image brightness and contrast for the black and white color dominan.
In this method, the process of inserting the secret information is done into three stages which are: Capacity Evaluation, Minimum-Error Replacement and Error Diffusion. AMELSBR also used by  but they used picture under .bitmap files on both cover and stegoimage.
There are two main kinds of halftoning techniques: ordered dithering  and error diffusion
Di Crescenzo, "Halftone visual cryptography via error diffusion
", IEEE Trans.
Topics discussed include halftone error diffusion
methods, visual cryptography for color images, cryptography for multiple secrets, photographic images, probabilistic visual cryptography schemes, cheating prevention, resolving alignment problems, steganography in halftone images, and two-decoding-option image sharing methods.
User controlled dot size and shape using block quantization called quantization and feedback process block error diffusion
(Damera-Venkata & Evans, 2001).
Dual 2D-Adaptive enhancement and ADL+ error diffusion
halftoning produce reliable monochrome copies of drawings and photos where subtle differences between shades of gray are maintained in the printed output.
The new Chameleon 36-in, monochrome/color scanner features 425 dpi optical resolution and patented high-precision color scanners, variable line resolution, and adaptive error diffusion
. It also has 36-bit image capturing processing capabilities for scanning poor quality images, such as a patented two-dimensional adaptive threshold, sharpening, softening, blurring, and the manufacturer's ADL+ error diffusion
halftone copying algorithm.
Another quality halftoning method, error diffusion
(the concept for which dates from the mid-1970s), Parker said "produces a very nice pattern" but exists simply as an algorithm rather than a screen.
An Edge Enhancement feature in UHQ eliminates the fuzzy look often appearing on transmitted text, graphics, and illustrations, and its Error Diffusion
Method provides more depth and clarity of halftones.