Specifications

Print2CAD OCR 2013- 105
Print2CAD
OCR 2013
extension of .BMP or .DIB.
Uncompressed bitmap les (such as BMP) are typically larger than compressed (with any
of various methods) image le formats for the same image. For example, the 1058×1058
Wikipedia logo, which occupies about 271 KB in the lossless PNG format, takes about
3358 KB as a 24-bit BMP le. Uncompressed formats are generally unsuitable for trans-
ferring images on the Internet or other slow or capacity-limited media. (...)”
Source: Wikipedia, subject “BMP”
License Agreement: http://creativecommons.org/licenses/by-sa/3.0/
17.1.4 PNG
“Portable Network Graphics (PNG) is a bitmap image format that employs lossless data
compression. Creation of PNG is to improve upon and replace GIF (Graphics Interchange
Format) as an image-le format not requiring a patent license. Pronunciation is /ˈpɪŋ/
ping, or pee-en-gee. The PNG acronym is optionally recursive, unofcially standing for
PNG‘s Not GIF. PNG supports palette-based (palettes of 24-bit RGB or 32-bit RGBA
colors), grayscale, grayscale with alpha, RGB, or RGBA images. PNG used for trans-
ferring images on the Internet, not for print graphics, and so does not support none RGB
color spaces (such as CMYK). (...)”
Source: Wikipedia, subject “PNG”
License Agreement: http://creativecommons.org/licenses/by-sa/3.0/
17.1.5 GIF
“The Graphics Interchange Format (GIF) is a bitmap image format that, was introduced
by CompuServe in 1987 and has since come into widespread usage on the World Wide
Web due to its wide support and portability.
The format supports up to 8 bits per pixel thus allowing a single image to reference a
palette of up to 256 distinct colors. The colors can be chosen from the 24-bit RGB color
space. It also supports animations and allows a separate palette of 256 colors for each
frame. The color limitation makes the GIF format unsuitable for reproducing color pho-
tographs and other images with continuous color, but it is well-suited for simpler images
such as graphics or logos with solid areas of color.
GIF images are compressed using the Lempel-Ziv-Welch (LZW) lossless data compression
technique to reduce the le size without degrading the visual quality. This compression