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PPM to GIF

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File extension.ppm
CategoryImage File
DescriptionThe portable pixmap format (PPM) is an image format designed to be easily exchanged between platforms which is used by Netpbm - an open-source package of graphics programs and a programming library, used mainly in the Unix world. The format is a lowest common denominator color image file format and is highly inefficient, containing a lot of information the human eye can’t even discern. The precursor to the PPM format was the PBM format which was invented by Jef Poskanzer in the 1980s as a format that allowed monochrome bitmaps to be transmitted within an email message as plain ASCII text, allowing it to survive any changes in text formatting. By the end of 1988, Poskanzer had developed the PGM and PPM formats along with their associated tools and added them to Pbmplus. The final release of Pbmplus was December 10, 1991.
Actions PPM to GIF - Convert file now
View other image file formats
Technical DetailsA PPM file consists of a sequence of one or more PPM images. There are no data, delimiters, or padding before, after, or between images. Each PPM image consists of the following:
  1. A magic number for identifying the file type. A ppm image's magic number is the two characters P6.
  2. Whitespace (blanks, TABs, CRs, LFs).
  3. A width, formatted as ASCII characters in decimal.
  4. Whitespace.
  5. A height, again in ASCII decimal
  6. 6. Whitespace.
  7. The maximum color value (Maxval), again in ASCII decimal. Must be less than 65536 and more than zero.
  8. A single whitespace character (usually a newline).
  9. A raster of Height rows, in order from top to bottom. Each row consists of Width pixels, in order from left to right. Each pixel is a triplet of red, green, and blue samples, in that order. Each sample is represented in pure binary by either 1 or 2 bytes. If the Maxval is less than 256, it is 1 byte. Otherwise, it is 2 bytes. The most significant byte is first.
There is actually another version of the PPM format that is fairly rare: plain PPM format.
Associated programs Adobe Photoshop
Corel Draw
GIMP
Netpbm
Developed by Jef Poskanzer
MIME type  image/x-ppm
image/x‑portable‑pixmap
Useful links NetPBM homepage
What is the NetPBM format ?
Convert PPM file
 

Convert PPM file

Using Zamzar it is possible to convert PPM files to a variety of other formats:

ppm to ai (Adobe Illustrator Artwork)
ppm to bmp (Windows bitmap)
ppm to eps (Encapsulated PostScript)
ppm to gif (Compuserve graphics interchange)
ppm to jpg (JPEG compliant image)
ppm to pcx (Paintbrush Bitmap Image)
ppm to pdf (Portable Document Format)
ppm to png (Portable Network Graphic)
ppm to tga (Truevision Targa Graphic)
ppm to tiff (Tagged image file format)
ppm to wbmp (Wireless Bitmap File Format)
ppm to webp (Lossily compressed image file)

PPM to GIF - Convert file now

Convert PPM to GIF

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File extension.gif
CategoryImage File
DescriptionThe GIF file format is a type of bitmap image and has become popular due to the growth of the internet. This file format supports up to 8 bits per pixel therefore giving an image the ability to contain 256 distinct colours chosen from the 24-bit RGB colour space. It also supports animations and whenever you see a logo or other sharp edged line art then you are probably dealing with the GIF format. It uses the lossless data compression technique which reduces the file size without any impact on the quality.
Actions PPM to GIF - Convert file now
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Technical DetailsThe GIF file format was invented by Compuserve for their online service, but they made the specifications publicly available. GIFs are able to hold multiple bitmaps of up to 256 colors each, using LZW (Lempel Zev Welch - a simple form of file compression that removes inefficiencies in the data storage without losing data or distorting the image) compressed raster data to minimize file sizes. The idea is to lessen the amount of colours in a GIF image to the minimum number necessary and to therefore remove stray colors that are not required to represent the image. A GIF graphic is unable to have more than 256 colors but it can have fewer colors, down to the minimum of two (black and white). Images with fewer colors will compress more efficiently under LZW compression.
Associated programs Adobe Photoshop
Apple Preview
Corel Paint Shop Pro
Microsoft Windows Photo Gallery Viewer
Developed by CompuServe
MIME type  image/gif
Useful links More detailed information on GIF files
Convert GIF file