Compression

Here is another post for my graphics assessment, this time it's:

Lossy and Lossless:

Lossy is a data encoding method used to compress pictures to save more memory. It does this by getting rid of some of the memory in the file, distorting it, but making it so there is a lot less memory being used by the file, an example of lossy is bellow:




84% less information than uncompressed
9.37 KB

                                                                                           

92% less information than uncompressed
4.82 KB








98% less information than uncompressed
1.14 KB





Lossless: lossless is a way to restore all data lost from the process of lossy, this is useful as you may have accidentally done a lossy on your file, or you have made more memory available, you can restore a picture you like.

File Extensions

Today I am posting for one of my assessments for college, I'm starting on "artistic styles used in computer games". alright, first up is:

File Extensions:

File extensions are used at the end of files to indicate what the file is and how the file is used, e.g. a .jpg is an image which, if it had layers, has been compressed to one layer, it also uses a very small piece of memory. Other common file extensions are: .bmp, .png, .gif, .tiff, .psd

bmp.: bmp. is a file extension used for a bitmap images which are 2D images. bmp. is used alot my Microsoft windows and OS/2 operating systems

png.: png. is a file extension used for bitmap images, png. was created to replace gif. as a better file extension, png. supports palette-based images, grey scale images and full colour non-palette images.

gif.: gif. is another file extension used for bitmap images, this format of file extension supports up to 8 bits per pixel allowing a single image to use up to 256 distinct colours.

tiff.: tiff. is a file extension used for storing images, it is used most commonly by: publishers, artists, photographers etc. Adobe holds the copyrights for tiff.

psd.: psd. is a file extension solely used for Photoshop, it allows the user to save the document, yet still keep all the layers they have used, yet this used a lot of memory for one file.