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AS and A Level: Computer Science
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Lossy compression BMP is also known as Bitmap images can be used for storing raw image data, although it has now been replaced with PNG which offers greater compression and is also lossless. * Easy to create from existing files * Pixel values may be modified individually or as large groups * Supported by virtually every device * Does not degrade when saved multiple times like JPEG does * Very large file size * do not scale very well * Lacks all the other features of the other formats GIF images are typically used for line art with limited colours and images with large flat areas of colour.
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Phones of today can be described as a playground for graphic image editing because they allow images to be edited to look more attractive and more appealing and fun. The downfall for to Mobile Phone in correlation to graphic imaging is that the file of phone manipulated images are very small which you have to take into consideration whilst considering graphical image editing on your phone; it may be small on a computer surface not only that if you
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Describe the hardware and software used to create and edit graphic images and compare the limitations of different hardware and software packages used.
The higher you set your resolution, the smaller your icons and text, and your refresh rate drops. This may be a big limitation to graphic designers who want to make high quality graphics. Also graphics cards can also cost thousands of pounds, require a lot of space and draw a lot of power from the power supply. RAM RAM stands for random access memory, a type of computer memory that can be accessed randomly. This means that any byte of memory can be accessed without touching the preceding bytes. RAM is the most common type of memory found in computers and other devices, such as printers. RAM is used to hold the running software and graphic images.
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Discuss the impact that file format, compression techniques, image resolution and colour depth have on file size and image quality.
The fundamental disadvantage of the BMP file format is that the bigger the resolution the bigger the real document itself, so to have the picture in a high resolution it will take up a lot of space. The second drawback of this arrangement is that when you expand the picture the picture quality reduces, this is called pixilation. Representation Interchange Format The Graphics Interchange Format (GIF) is a bitmap image format that is utilised a considerable amount for pictures on the web since it is ideal to use due to support, compatibility and is not too large in space and doesn?t take a long time to upload to be used on Web Pages.
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And threats like key loggers could gain private information. Therefore, anti-virus software prevents harm to the computer making it perform less efficient and protects private information. Disk clean up can help find unused files that can be deleted. It gives you the option to safely remove the unused files to help improve the performance of the computer by making it run faster or frees spaces so that more used files can be saved. If the computer has a lack of space it will slow down the computer.
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