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The reason a spacer GIF is invisible is so that an HTML developer can create a table cell and fill the background with a specific color that can be viewed through the transparent spacer GIF. For instance, a developer seeking to create a square blue box 500 pixels on a side could use a separate blue 500×500 graphic at the expense of additional ...
25 out of 55 usable colors (12 hues by 4 luminosity levels, + 7 greys); 1 background color, four 3-color (plus transparent) tile palettes and four 3-color (plus transparent) sprite palettes. Sega Master System (1985) 32 colors out of 64 (2 bits for each of red, green, and blue) NEC PC-Engine/TurboGrafx-16 (1987) 482 colors out of 512
Transparent background color; this is a bit field, the lowest bit signifies transparency 311: 00 00: Delay for animation in hundredths of a second; not used: 313: 10: 16: Color number of transparent pixel in GCT 314: 00: End of GCE block Image Descriptor 315: 2C ',' An Image Descriptor (introduced by 0x2C, an ASCII comma ',') 316: 00 00 00 00 ...
One color entry in a single GIF or PNG image's palette can be defined as "transparent" rather than an actual color. This means that when the decoder encounters a pixel with this value, it is rendered in the background color of the part of the screen where the image is placed, also if this varies pixel-by-pixel as in the case of a background image.
This is a list of software palettes used by computers. Systems that use a 4-bit or 8-bit pixel depth can display up to 16 or 256 colors simultaneously. Many personal computers in the early 1990s displayed at most 256 different colors, freely selected by software (either by the user or by a program) from their wider hardware's RGB color palette.
The Magnavox Odyssey 2 is equipped with an Intel 8244 (NTSC) or 8245 (PAL) custom IC, and uses a 4-bit RGBI color palette. [34] [35] Bits 0 to 2 define Grid color, bits 3 to 5 define Background color, bit 6 defines Grid luminance (0=dim/1=bright) and bit 7 is unused. [35] The Tandy 2000 Graphics Adapter with Color Graphics Option. [36] [37]
An example is the 256-color palette commonly used in the GIF file format, in which 256 colors to be used to represent an image are selected from the whole 24 bit color space, each being assigned an 8 bit index. This way, while the system can potentially reproduce any color in the RGB color space (as long as the 256 color restriction allows ...
A color spectrum image with an alpha channel that falls off to zero at its base, where it is blended with the background color.. In computer graphics, alpha compositing or alpha blending is the process of combining one image with a background to create the appearance of partial or full transparency. [1]