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Pictor Paint
PCPaint was one of the first IBM PC-based mouse-driven GUI paint programs, released in 1984. It followed after Microsoft Doodle, released in 1983 with the Microsoft Mouse version 1 drivers for DOS, and around the same time as Digital Research’s Draw program. It was developed and created by John Bridges and Doug Wolfgram. It was later developed into Pictor Paint. The hardware manufacturer Mouse Systems bundled PCPaint with millions of computer mice that they sold, making PCPaint one of the best-selling DOS-based paint programs of the mid 1980s. History In 1983, Doug Wolfgram purchased a Microsoft Mouse and decided to write a drawing program for it. They named it “Mouse Draw”. The interface was primitive but the program functioned well. Wolfgram traveled to SoftCon in New Orleans where he demonstrated the program to Mouse Systems. Mouse Systems was developing an optical mouse and they wanted to bundle a painting program so they agreed to publish Mouse Draw. The origi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
John Bridges (software Developer)
John Bridges is the co-author of the computer program PCPaint and primary developer of the program GRASP for Microtex Industries with Doug Wolfgram. He is also the sole author of GLPro and AfterGRASP. His article entitled "Differential Image Compression" was published in the February 1991 issue of Dr. Dobb's Journal. Early work In 1980 Bridges started his programming career at the NYU Institute for Reconstructive Plastic Surgery as a summer intern, working with sophisticated programmable vector graphics systems. He wrote editing tools and also updated and debugged software used for early 3D x-ray scanning research. From 1981 to 1985 Bridges wrote the RAM disk drivers, utilities, cracking software, task switching software, and memory test diagnostics for Abacus, a maker of large memory cards for the Apple II. In 1982, he started working for Classroom Consortia Media, Inc., an educational software company, developing and writing Apple and IBM graphics libraries and tools for th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
IMG (file Format)
An IMG file, a.k.a. raw image, contains a complete and uncompressed image of a storage device's data content. The image includes the value of each memory location of the storage device, ordered sequentially such that the data can be written to a similar device to completely overwrite its content. The layout of data in a raw image depends on the file system of the target storage device (for example FAT). For example, an optical disc (i.e. CD or DVD) raw image contains the tracks of audio or video. In the case of a CD-ROM or DVD, an image usually includes not only the data of each sector, but the control headers and error correction fields for each sector as well. Since raw image files hold no additional data, metadata, beyond the storage content, determining the structure of an existing image can be difficult. Either a user remembers what a file contains via their memory or records metadata in the file name or via some other mechanism. In some cases, a tool can detect as ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
8-bit Color
8-bit color graphics are a method of storing image information in a computer's memory or in an image file, so that each pixel is represented by 8 bits (1 byte). The maximum number of colors that can be displayed at any one time is 256 per pixel or 28. Color quantization In order to turn a true color 24-bit image into an 8-bit image, the image must go through a process called color quantization. Color quantization is the process of creating a color map for a less color dense image from a more dense image. The simplest form of quantization is to simply assign 3 bits to red, 3 bits to green and 2 bits to blue, as the human eye is less sensitive to blue light. This creates a so called 3-3-2 8-bit color image, arranged like on the following table: Bit 7 6 5 4 3 2 1 0 Data R R R G G G B B This process is sub optimal. There could be different groupings of colors that make evenly spreading the colors out inefficient and likely to misrepresent the actual image. A ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Flood Fill
Flood fill, also called seed fill, is a flooding algorithm that determines and alters the area connected to a given node in a multi-dimensional array with some matching attribute. It is used in the "bucket" fill tool of paint programs to fill connected, similarly colored areas with a different color, and in games such as Go and Minesweeper for determining which pieces are cleared. A variant called boundary fill uses the same algorithms but is defined as the area connected to a given node that does not have a particular attribute. Note that flood filling is not suitable for drawing filled polygons, as it will miss some pixels in more acute corners. Instead, see Even-odd rule and Nonzero-rule. The algorithm parameters The traditional flood-fill algorithm takes three parameters: a start node, a target color, and a replacement color. The algorithm looks for all nodes in the array that are connected to the start node by a path of the target color and changes them to the replace ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Enhanced Graphics Adapter
The Enhanced Graphics Adapter (EGA) is an IBM PC compatible, IBM PC Video card, graphics adapter and ''de facto'' computer display standard from 1984 that superseded the Color Graphics Adapter, CGA standard introduced with the IBM Personal Computer, original IBM PC, and was itself superseded by the Video Graphics Array, VGA standard in 1987. In addition to the original EGA card manufactured by IBM, many compatible third-party cards were manufactured, and EGA graphics modes continued to be supported by VGA and later standards. History EGA was introduced in October 1984 by IBM,High-Resolution Standard Is Latest Step in DOS Graphics Evolution, ''InfoWorld'', June 26, 1989, p. 48.News Briefs, Big Blue Turns Colors, ''InfoWorld'', October 8, 1984. shortly after its new IBM Personal Computer AT, PC/AT. The EGA could be installed in previously released IBM PCs, but required a Read-only memory, ROM upgrade on the Motherboard, mainboard. Chips and Technologies' first product, announced ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
PCjr
The IBM PCjr (pronounced "PC junior") was a home computer produced and marketed by IBM from March 1984 to May 1985, intended as a lower-cost variant of the IBM PC with hardware capabilities better suited for video games, in order to compete more directly with other home computers such as the Apple II and Commodore 64. It retained the IBM PC's Intel 8088, 8088 CPU and BIOS interface, but provided enhanced graphics and sound, ROM cartridge slots, built-in joystick ports, and an infrared wireless keyboard. The PCjr supported expansion via "sidecar" modules, which could be attached to the side of the unit. Despite widespread anticipation, the PCjr was ultimately unsuccessful in the market. It was only partially IBM PC compatible, limiting support for IBM's software library. Its chiclet keyboard was widely criticized for its poor quality. The PCjr also suffered from limited expandability; it was initially offered with a maximum of of RAM, insufficient for many PC programs. Models ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
PICtor PIC Image Format
PICtor is an image file format developed by John Bridges, the principal author of PCPaint, the first Paintbrush program for the PC. It was also the native file format for Pictor Paint and Graphics Animation System for Professionals (GRASP) (also by Bridges) and became the first widely accepted DOS imaging standard. Typical file format The PICtor format is a device-independent raster image format; the file header stores information about the display hardware (screen resolution, color depth and palette information, bit planes, and so on) separately from the actual image information, allowing the image to be properly transferred and displayed on computer systems with different hardware. PIC files commonly stored palette-indexed images ranging from 2 or 4 colors to 16 and 256 colors, although the format has been extended to record true-color (24-bit) images as well. Although it is device-independent, the PIC format also contains additional information about the device that it ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
BSAVE (graphics Image Format)
BSAVE and BLOAD are commands in many varieties of the BASIC programming language. BSAVE copies RAM to a binary file, and BLOAD copies the contents of the file to RAM. The term "BSAVE image" could mean any of various raw image formats of video display controllers, or more generally any file containing the raw contents of a section of memory. Some platforms provided a BRUN command that, after loading the file into memory, would immediately attempt to execute it as machine code. There is no file compression, and therefore these files load very quickly and without much programming when displayed in native mode. BSAVE files were in general use as a file format when the IBM PC was introduced. It was also in general use on the Apple II in the same time period. Although the commands were available on the Commodore PET line, they were removed from the later (and more popular) Commodore 64 and VIC-20 computers. In 1985 the Commodore 128 was released with Commodore BASIC version 6.9 which ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Paint Program
A raster graphics editor (also called bitmap graphics editor) is a computer program that allows users to Computer graphics, create and image editing, edit images interactively on the computer screen and save them in one of many raster graphics Image file formats, file formats (also known as bitmap images) such as JPEG, Portable Network Graphics, PNG, and GIF. Comparison to vector graphic editors Vector graphics editors are often contrasted with raster graphics editors, yet their capabilities complement each other. The technical difference between vector and raster editors stem from the difference between vector and raster images. Vector graphics are created mathematically, using Geometry, geometric formulas. Each element is created and manipulated numerically; essentially using Cartesian coordinate system, Cartesian coordinates for the placement of key points, and then a mathematical algorithm to connect the dots and define the colors. Raster images include Digital photography ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
