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Videoface
Videoface Digitizer is a video digitizer interface for the ZX Spectrum home computer. It was produced by Data-Skip from The Netherlands and later on by Romantic Robot UK Ltd from UK in 1987. It was originally sold for GBP 69, but the price dropped to 30 GBP within few years. ''Videoface'' takes signal from any video source with composite video out capability. It produces a 256 × 192 pixel 4-bit screen. Scanning speed is just below four frames per second. These screens can be saved as single pictures or animations with variable speed, and later loaded into any drawing program for editing. During scanning, the contrast of the picture can be adjusted by turning the knob Knob or KNOB may refer to: Objects * A round handle ** Doorknob ** Control knob, controls a device ** Brodie knob, on a steering wheel * Tow ball or hitch ball * Dorset knob, a biscuit Landforms * A rounded hill or mountain, particularl ... on top of the ''Videoface'', and the picture can be s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Videoface
Videoface Digitizer is a video digitizer interface for the ZX Spectrum home computer. It was produced by Data-Skip from The Netherlands and later on by Romantic Robot UK Ltd from UK in 1987. It was originally sold for GBP 69, but the price dropped to 30 GBP within few years. ''Videoface'' takes signal from any video source with composite video out capability. It produces a 256 × 192 pixel 4-bit screen. Scanning speed is just below four frames per second. These screens can be saved as single pictures or animations with variable speed, and later loaded into any drawing program for editing. During scanning, the contrast of the picture can be adjusted by turning the knob Knob or KNOB may refer to: Objects * A round handle ** Doorknob ** Control knob, controls a device ** Brodie knob, on a steering wheel * Tow ball or hitch ball * Dorset knob, a biscuit Landforms * A rounded hill or mountain, particularl ... on top of the ''Videoface'', and the picture can be s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Romantic Robot UK Ltd
Romantic Robot is a small independent British company that publishes classical music recordings. In the 1980s it designed and produced peripherals and software for home computers. History Romantic Robot was founded in London in 1983 by Czech-born Alexander Goldscheider and Ondřej Kořínek. The company sold hardware and software for the Sinclair ZX Spectrum, Amstrad CPC and later Atari ST home computers. After Kořínek left the company in 1990, Romantic Robot specialised in music production and publishing. Home computer peripherals The company's primary hardware product was the Multiface series of interface devices which allowed dumping and retrieval of the computer's RAM contents to external storage devices such as disk drives, as well as utilities for viewing and disassembling that data. The first in the series was the Multiface One for the ZX Spectrum. It was followed by the Multiface Two for the Amstrad CPC, the Multiface 128 for the Spectrum 128, the Multiface 3 for th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
ZX Spectrum
The ZX Spectrum () is an 8-bit computing, 8-bit home computer that was developed by Sinclair Research. It was released in the United Kingdom on 23 April 1982, and became Britain's best-selling microcomputer. Referred to during development as the ''ZX81 Colour'' and ''ZX82'', it was launched as the ''ZX Spectrum'' to highlight the machine's colour display, which differed from the black and white display of its predecessor, the ZX81. The Spectrum was released as six different models, ranging from the entry level with 16 Kilobyte, KB RAM released in 1982 to the ZX Spectrum +3 with 128 KB RAM and built in floppy disk drive in 1987; altogether they sold over 5 million units worldwide (not counting List of ZX Spectrum clones, unofficial clones). The Spectrum was among the first home computers in the United Kingdom aimed at a mainstream audience, and it thus had similar significance to the Commodore 64 in the US and the Thomson MO5 in France. The introduction of the ZX Spect ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Digitizer
DigitizationTech Target. (2011, April). Definition: digitization. ''WhatIs.com''. Retrieved December 15, 2021, from https://whatis.techtarget.com/definition/digitization is the process of converting information into a digital (i.e. computer-readable) format.Collins Dictionary. (n.d.). Definition of 'digitize'. Retrieved December 15, 2021, from https://www.collinsdictionary.com/dictionary/english/digitize The result is the representation of an object, image, sound, document, or signal (usually an analog signal) obtained by generating a series of numbers that describe a discrete set of points or samples. The result is called ''digital representation'' or, more specifically, a ''digital image'', for the object, and ''digital form'', for the signal. In modern practice, the digitized data is in the form of binary numbers, which facilitates processing by digital computers and other operations, but digitizing simply means "the conversion of analog source material into a numerical f ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Composite Video
Composite video is an analog video signal format that carries standard-definition video (typically at 525 lines or 625 lines) as a single channel. Video information is encoded on one channel, unlike the higher-quality S-Video (two channels) and the even higher-quality component video (three or more channels). In all of these video formats, audio is carried on a separate connection. Composite video is also known by the initials CVBS for composite video baseband signal or color, video, blanking and sync, or is simply referred to as ''SD video'' for the standard-definition television signal it conveys. There are three dominant variants of composite video signals, corresponding to the analog color system used: NTSC, PAL, and SECAM. Usually composite video is carried by a yellow RCA connector, but other connections are used in professional settings. Signal components A composite video signal combines, on one wire, the video information required to recreate a color picture, a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pixel
In digital imaging, a pixel (abbreviated px), pel, or picture element is the smallest addressable element in a raster image, or the smallest point in an all points addressable display device. In most digital display devices, pixels are the smallest element that can be manipulated through software. Each pixel is a sample of an original image; more samples typically provide more accurate representations of the original. The intensity of each pixel is variable. In color imaging systems, a color is typically represented by three or four component intensities such as red, green, and blue, or cyan, magenta, yellow, and black. In some contexts (such as descriptions of camera sensors), ''pixel'' refers to a single scalar element of a multi-component representation (called a ''photosite'' in the camera sensor context, although ''sensel'' is sometimes used), while in yet other contexts (like MRI) it may refer to a set of component intensities for a spatial position. Etymology The w ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Frame Rate
Frame rate (expressed in or FPS) is the frequency (rate) at which consecutive images (frames) are captured or displayed. The term applies equally to film and video cameras, computer graphics, and motion capture systems. Frame rate may also be called the , and be expressed in hertz. Frame rate in electronic camera specifications may refer to the maximal possible rate, where, in practice, other settings (such as exposure time) may reduce the frequency to a lower number. Human vision The temporal sensitivity and resolution of human vision varies depending on the type and characteristics of visual stimulus, and it differs between individuals. The human visual system can process 10 to 12 images per second and perceive them individually, while higher rates are perceived as motion. Modulated light (such as a computer display) is perceived as stable by the majority of participants in studies when the rate is higher than 50 Hz. This perception of modulated light as steady is known ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Contrast (vision)
Contrast is the contradiction in luminance or colour that makes an object (or its representation in an image or display) distinguishable. In visual perception of the real world, contrast is determined by the difference in the colour and brightness of the object and other objects within the same field of view. The human visual system is more sensitive to contrast than absolute luminance; we can perceive the world similarly regardless of the huge changes in illumination over the day or from place to place. The maximum ''contrast'' of an image is the contrast ratio or dynamic range. Images with a contrast ratio close to their medium's maximum possible contrast ratio experience a ''conservation of contrast'', wherein any increase in contrast in some parts of the image must necessarily result in a decrease in contrast elsewhere. Brightening an image will increase contrast in dark areas but decrease contrast in bright areas, while darkening the image will have the opposite effect. B ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Control Knob
{{more citations needed, date=January 2017 A control knob is a rotary device used to provide manual input adjustments to a mechanical/electrical system when grasped and turned by a human operator, so that differing extent of knob rotation corresponds to different desired input. Control knobs are a simpler type of input hardware and one of the most common components in control systems, and are found on all sorts of devices from taps and gas stoves to optical microscopes, potentiometers, radio tuners and digital cameras, as well as in aircraft cockpits.https://www.amazon.com/b?node=16412811 Operation A control knob works by turning a shaft which connects to the component which produces the actual input. Common control components used include potentiometers, variable capacitors, and rotary switches. An example where the knob does not produce a variation in an electrical signal may be found in many toasters, where the darkness knob moves the thermostat A thermostat is a reg ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
