Pixel and resolution


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Pixel and resolution

  1. 1. Pixel and Resolution 'Pixel' is short for 'Picture Element', Pixels are used in most electrical screens such as computers or mobile phones, the screens are divided into thousands and in some cases millions of pixels which can't be seen from afar because they are so small which is useful as many coloured pixels clustered together can create a smooth looking image which tricks the eye. If a computers screen would be '1366x768' taken from my own computers resolution, it is difficult to stare at a point blank range and notice the individual pixels, but on a '640x480' screen, it will be easier to notice the pixels on the screen, this is because a '640x480' screen contains 640 by 480 pixels all together which are larger and take up more of the screen as a whole, making them more visible. Pixels can only be one given colour at a time but being so small they can combine together to make a smooth looking blend of colours. The number of colours the pixels on a screen can be a determined by the number of bits available, for example; 8 Bit - 256 Colours, 16 Bit (Also reffered to as High Colour)- - 65,536 Colours,
  2. 2. 24 Bit (Also Referred to as True Colour) - 16,777,216 Colours. 'http://en.wikipedia.org/wiki/Color_depth#True_color_.2824-bit.29' http://en.wikipedia.org/wiki/Pixel Where do pixels come of use in Gaming? As you'll see in the mario timeline above, as Pixels became backed up with higher bits in computers, more colours and more detailed graphics became available over the years that the gaming industry became increasingly popular, with the high spec consoles we have currently such as Razer PC's, Microsofts' 'Xbox One' or the Sony 'PS4' we can currently apply high amounts of graphic detail into a game without overusing the capabilities of the consoles due to new engines and such. Which is where more pixels can be combined together on high resolution screens and high ‘bit’ consoles, making shading and realism much more attainable?
  3. 3. Vector and Raster Images. Raster images A Raster image is made of in computer graphics, a raster graphics image, or bitmap, is a dot matrix data structure representing a generally rectangular grid of pixels, or points of colour, viewable via a monitor, paper, or other display medium. Raster images are stored in image files with varying formats. Vector images Vector graphics is the use of geometrical primitives such as points, lines, curves, and shapes or polygon(s), which are all based on mathematical expressions, to represent images in computer graphics. Vector graphics are based on vectors (also called paths, or strokes) which lead through locations called control points. Each of these points has a definite position on the x and y axes of the work plan. Each point, as well, is a variety of database, including the location of the point in the
  4. 4. work space and the direction of the vector (which is what defines the direction of the track). Each track can be assigned a color, a shape, a thickness and also a fill. Raster and Vector images in Gaming Vector game can also refer to a video game that uses a vector graphics display capable of projecting images using an electron beam to draw images instead of with pixels, much like a laser show. Many early arcade games used such displays, as they were capable of displaying more detailed images than raster displays on the hardware available at that time. Many vector-based arcade games used full-colour overlays to complement the otherwise monochrome vector images.
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  6. 6. File formats and uses. BMP- Short for "Bitmap." It can be pronounced as "bump," "B-M-P," or simply a "bitmap image." The BMP format is a commonly used raster graphic format for saving image files. It was introduced on the Windows platform, but is now recognized by many programs on both Macs and PCs. The BMP format stores colour data for each pixel in the image without any compression. For example, a 10x10 pixel BMP image will include colour data for 100 pixels. PNG- PNG, which can be pronounced "ping" or "P-N-G," is a compressed raster graphic format. It is commonly used on the Web and is also a popular choice for application graphics. Unlike the JPEG and GIF formats, the PNG format supports an alpha channel, or the "RGBA" colour space. The alpha channel is added to the three standard colour channels (red, green, and blue, or RGB) and provides 256 levels of transparency. JPEG images do not support transparent pixels and GIF images only support completely transparent (not partially opaque) pixels
  7. 7. GIF- The letters GIF stand for Graphics Interchange Format, a GIF is based on indexed colours, which is a palette of at most 256 colours. This helps greatly reduce their file size. These compressed image files can be quickly transmitted over a network or the Internet, which is why you often see them on Web pages. GIF files are great for small icons and animated images, but they lack the colour range to be used for high- quality photos. TIFF- Tiff stands for "Tagged Image File Format." It is graphics file format created in the 1980's to be the standard image format across multiple computer platforms. The TIFF format can handle colour depths ranging from 1-bit to 24-bit. Since the original TIFF standard was introduced, people have been making many small improvements to the format, so there are now around 50 variations of the TIFF format.
  8. 8. .jpg Also known as jpeg is a common method of ‘lossy compression’ for digital images, mostly known for images made with digital photography You can change the amount of compression, making choice between storage size and the quality of image. .psd The file type used by Adobe Photoshop, a psd file can save all settings previously used within the project, such as layers, changes to the image, image masks etc They can also be found as .psb which stands for ‘’photoshop big’’ due to it being a large image, increasing the maximum height and width to 300,000 pixels. .pdf Portable document format, it is used to present documents from applications such as word or presentation, to be shown on different operating systems, software and hardware
  9. 9. .eps PostScript (.PS) file that may contain 2D vector graphics, bitmap images, and text; may also include an embedded preview image in bitmap format; can be placed within another PostScript document. EPS files are supported by several different drawing programs and vector graphic editing applications. They are often used as a standard means for transferring image data between different operating systems. .ai AI is a file extension for a vector graphics file format used in an Adobe Illustrator drawing. Adobe Illustrator is a popular vector graphics-based drawing program. The AI format is a strictly limited, highly simplified subset of EPS.
  10. 10. Compression- Compression is useful as it can reduce the overall number of bits and bytes within a file so it can be transmitted faster over slow internet connections and take up less space on a disk. It takes programs (depending on the compression) such as Winrar to expand the file back into its original size identical to before it was compressed. Image Capture Devices- Image capture devices can include software which captures images within the device, there are also devices dedicated to capturing images such as Cameras, mobile phones etc. Optimising- Optimising an image requires getting the correct balance between filesize and the quality of the picture
  11. 11. Storage and Asset Management- “Digital asset management (DAM) consists of management tasks and decisions surrounding the ingestion, annotation, cataloguing, storage, retrieval and distribution of digital assets. Digital photographs, animations, videos and music exemplify the target areas of media asset management (a sub-category of DAM). Digital asset management systems (DAMS) include computer software and hardware systems that aid in the process of digital asset management. The term "digital asset management" (DAM) also refers to the protocol for downloading, renaming, backing up, rating, grouping, archiving, optimizing, maintaining, thinning, and exporting files.” ‘http://en.wikipedia.org/wiki/Digital_asset_management’