Resolution• Bitmap images are made up of pixels. Image resolution is the number ofpixels per inch (PPI) in the bitmap grid the more the pixels the betterquality image is• There are two features to every bitmap image – its size meaning the widthand height In inches and resolution meaning the number of pixels perinch.• Both of these factors both determine the total number of pixels in apicture
resolution• Some typical resolutions include:• 256x256 – found in many cheap cameras, this resolution makes the camera picturequality really bad almost unacceptable. This resolution holds 65,536 individualpixels.• 640x480 – this is found in low end cameras, but mainly this resolution is used forsending pictures or posting pictures on a website. This is has 307,200 pixels or 0.3mega pixels*• 2240x1680 – this resolution is mainly found in 4 megapixel cameras (the currentstandard) this allows even bigger printed photos, with good quality for prints up to16x20 inches. This resolution holds over 3 million pixels.• The top end cameras mainly use 4064x2704, this is a basic digital camera with 11.1megapixels which takes a picture at this resolution, plus when you print a pictureyou can create a 13.5x9 inch print with no picture quality.• *megapixels – more than 1 million pixels
resolution• The more the pixels there are within a picture, the moredetailed the image can be displayed at.• But the fewer pixels there are in an image, the less detailedthe image will be displayed at.• There are two ways to show an image mainly on screen andprint:• The standard for screen displays is 72 PPI.• The standard for Print is 300 PPI.
pixels• In digital imaging, a pixel is the physical point In a rasterimage. So it is the smallest element of picture represented onthe screen. The address of a pixel resembles to its physicalco-ordinates.• The term pixel is in fact short for Picture Element. These smalllittle dots are what make up the images on digital. The screenis separated up into a matrix of thousands or even millions ofpixels.
pixels• Data is stored in bits. Each bit symbolizes two colours becauseit has the value of 0.1. so basically the more bits per pixel, themore colours can be presented on the screen. Examples ofcolour depth is shown in he table below:Colour Depth Number Of Colours1 Bit Colour 24 Bit Colour 168 Bit Colour 25616 Bit Colour 65,53624 Bit Colour 16,777,21632 Bit Colour 4,294,967,29648 Bit Colour 281,474,976,710,656
pixels• Defining Colour Depth: since each Bit symbolizes as 2 Colours, it is very easy towork out the number of colours for the various colour depths. The number ofpossible colours would have to be 2 to the power of the number of bits per pixelfor example:A colour depth of 4 bits would be 2 times itself 4 times:24 or 2 x 2 x 2 x 2 = 16 coloursA colour depth of 8 bits would be 2 times itself 8 times:28 or 2 x 2 x 2 x 2 x 2 x 2 x 2 x 2 = 256 colours.A colour depth of 24 bits would be 2 times itself 24 times:224 or 2 x 2 x 2 x 2 x 2 x 2 x 2 x 2 x 2 x 2 x 2 x 2 x2 x 2 x 2 x 2 x 2 x 2 x 2 x 2 x 2 x 2 x 2 x 2 = 16,777,216 colours
Light and Effect• As an alternative of a film, a digital camera has a sensor thatalters light energy into an electrical charges. A digital cameratakes light and focuses it via the lens right to the sensor whichis made out of silicon. It is made up of sections also called agrid and its made up of tiny photosites that are very sensitiveto light. Each photosite is mainly called a pixel, a reduction of“picture element”. There are hundreds of millions of theseindividual pixels in the sensor of a digital camera.
Lighting in games• Lighting in a game is very important from a gamersperspective because it is mainly used to create an atmospherefor example within call of duty zombies the light makes itbecome dark and murky to create an atmosphere of fear andcaution. On the other hand to create a more light heartedatmosphere the developers may create a colourful andbrighter atmosphere.
File formats and uses• Bmp: BMP stands for bitmap. Bitmap is a computer term, it is a type of graphic format. So, if youhave a graphic file, you might see .bmp at the end of the file name.• Png: PNG stands for portable network graphics. It is a raster image format that allows you tolossless data compression. PNG supports Grayscale images with or without alpha channel.• Gif: GIF stands for Graphical interchange format, this supports up to 8 bits per pixel, this alsosupports animations and allows a palette of 256 colours for each frame.• Tiff: TIFF stands tagged image file format, this file is for storing images. It mainly supports imagemanipulation programmes, as well as publishing and page layout applications• Jpg: JPG or JPEG stands for joint photographic experts group, this is a common digital image formatfor lossy compression. The amount of compression can be adjusted, this means that the size of thefile versus the quality can be measured.• Psd: PSD stands for photo shop document, this is a file for Photoshop documents, this format havesthe advantage of sustaining an image with all its current layers when put in to an image editingsoftware• Pdf: PDF stands for portable document format, this file is a file format which can be used to signifydocuments without application software, hardware, or operating systems. Each PDF file contains awidespread description of a fixed-layout flat document, including the text, fonts and graphics• Eps: EPS stands for encapsulated post script, this file is a DCS-Conforming post script document, it’sintended use is as a graphics file format. These file documents are fairly self contained and are usedto describe an image or drawing.• Ai: AI stands for Adobe illustrator artwork this sile format is used to display a single page of vectorbased drawings within an PDF file format.
Compression• Compression is a method of encoding information with fewer bits than the originalfile. Compression can be lossy or lossless. When it comes to lossless, bits arereduced via identifying statistical redundancy. No information/data will be lost inlossless compression. On the other hand, lossy compression recognizesunnecessary information and has it deleted. While data compression is the mostcommon term used for reducing the size of files.
Image capture devices• Image capture devices are basically used to capture digital images, theycan range from cameras to camcorders to scanners to capture cards.• Once captured, the digital image can be stored and worked on a computerusing image manipulation software such as Adobe Photoshop or AdobeIllustrator and for more modest changes, Microsoft Paint.
OptimisingOptimising in the Computer sense is the process of adjusting the systems function in order to have it run moresmoothly. In a general sense, optimising will help a computer run more swiftly. This is done by closing downapplications which aren’t essential, or it could cause the computer to use more memory on a single applicationin order to improve its performance.Computer optimisation can happen at a variety of levels, these include:• Design Level• Source Code Level• Build level• Compile level• Assembly level
StorageThese could be used to increase extra storage space or transport your data around. In relation to VideoGames, Storage space has come in a few forms. On the PS3 and Xbox 360, they resemble a computer and use aHDD, while also letting Portable HDD’s and Pen Drives. However on older consoles, things such as memorycards were used and on most portable devices, memory cards like to those used in cameras can be used.
Bibliography• YouTube links:• Resolution video• Pixel video• Light in gamesWebsite Links:• resolution web link• Pixel web link• light and effect in games web link