PPM to GIF converter

.ppm

Portable pixmap images can be stored using the PPM format, which is basic, for example, color (PPM), grayscale (PGM), and black and white (PBM). A portable pixmap can provide a hallway representation of information in the conversion process of bitmap image files of the three types mentioned between different platforms. Jeff Poskanzerom developed the PPM format.

PPM files comprise sequences of a single or more PPM image. Data, padding, and limits do not exist before or after or in the middle of images. Every PPM comprises a single magic number used in identifying the type of file; the magic number for a PPM image is the two-character P6, whitespace (blanks, TABs, CRs, and LFs), and width presented as ASCII characters in decimal. It also comprises whitespace again, which is shown in ASCII decimal. Whitespace, the color value at a maximum (Maxval), is in decimal form, and it should be greater than zero but less than 65536. It is also composed of another single whitespace character, which is on another line. Lastly, it is composed of a raster of height rows found in reverse chronological order. The rows are comprised of width pixels in a left to right format. The samples represented have a pure binary nature, which is by one or two bytes. I byte has a Maxval of less than 256; otherwise, it is 2 bytes. The first byte is the most relevant. The straightforward format is another version of the PPM that exists but is most uncommon.

Jef Poskanzer

.gif

GIF, Graphics Interchange Format, is one of the most popular bitmap image formats on the World Wide Web, allowing you to share images. It also supports transparent views of various animations. Such files are used to develop web advertising with sequentially changing pictures and the graphics shell of video files. They use scan-line images with the depth parameters up to 256 colors of the RGB palette. The process of compressing files in GIF does not affect the quality in any way, as there is no loss because of the compression technique. Due to this, it is possible to convert to other formats while preserving the original image properties. Many applications open the extension to view and process images and video content installed on PCs and mobile devices regardless of OS.

The format was developed by Compuserve specialists, especially for its use in the web environment, which provided broad public access to data on such files. The extension uses the LZW algorithm to carry out a parallel process with the removal of segments containing insufficient information. This ensures the preservation of high-quality pictures. Thanks to the Lempel-Ziv-Welch algorithm, the format handles graphic files with repeating sections well, particularly images with a large number of single-color pixels horizontally. Interlaced data storage is also possible. Scan-line data is compressed to the smallest size. Reducing the number of colors required to create an image is provided by removing shades unnecessary to perform this process. The range of available GIF colors is from 2 (black and white) to 256 while reducing the number of colors leads to a decrease in the file size.

CompuServe