https://padlet.com/tay17001125/5fzwn4zu29r9 Made with three open minds en-us 2017-09-28 13:13:45 UTC 2023-02-10 23:58:27 UTC hello@padlet.com willbunce99 https://padlet.com/tay17001125/5fzwn4zu29r9/wish/192054671 2017-09-28 13:21:17 UTC https://padlet.com/tay17001125/5fzwn4zu29r9/wish/192054671 willbunce99 https://padlet.com/tay17001125/5fzwn4zu29r9/wish/192055183 Compression is the process of taking an object one size and making it smaller. This can be done by changing file extensions to smaller files, for example compressing down from a .BMP to a .GIF. This process essentially reduces the amount of bits required to represent the same data. In a .BMP to .GIF compression this reduction is at the cost of color depth, as less colors are represented, less bits are needed. There are two types of compression, Lossless and Lossy.]]> 2017-09-28 13:22:10 UTC https://padlet.com/tay17001125/5fzwn4zu29r9/wish/192055183 har17003010 https://padlet.com/tay17001125/5fzwn4zu29r9/wish/192055429 We as humans are impatient. We need file compression to back up significantly more data, faster. This allows the file to be sent without being corrupted. It allows the compressed files to be downloaded and opened from a web page or a email application. It is needed to send large documents over the internet as email attachments. ]]> 2017-09-28 13:22:33 UTC https://padlet.com/tay17001125/5fzwn4zu29r9/wish/192055429 tay17001125 https://padlet.com/tay17001125/5fzwn4zu29r9/wish/192055570 Lossy compression is a form of compression that shaves data off of the original file. Lossy compression works as the computer takes insignificant details that it thinks that a human may not be able to recognize, and gets rid of it, ergo reducing the file size. Lossy Compression is irreversible, which means that once the original file has been compressed, there is no way to recover the data that was deleted in the conversion process.]]> 2017-09-28 13:22:49 UTC https://padlet.com/tay17001125/5fzwn4zu29r9/wish/192055570 tay17001125 https://padlet.com/tay17001125/5fzwn4zu29r9/wish/192058477 2017-09-28 13:28:01 UTC https://padlet.com/tay17001125/5fzwn4zu29r9/wish/192058477 willbunce99 https://padlet.com/tay17001125/5fzwn4zu29r9/wish/192059326 Lossless Compression is the process of taking an object one size and making it smaller without editing the object, for example taking a box filled with stuff and re-arranging the stuff in it and then putting it in a smaller box - you still have the same amount of stuff in the box, it is just in a smaller box. This means that it takes up less space. In file compression the same concept is used, for example, a .BMP file may have a file size of 800kb, if you compressed it down to a .GIF file, you would lose some color depth, but the file may then be around 50kb. The way that this has occurred is because a .BMP image may have 300-400 thousand colors or even more, when compressing down to a .GIF file, all colors are merged and blended meaning for example if there are lots of shades of green in the image, the GIF file will merge them all to display just one or two shades of green.]]> 2017-09-28 13:29:36 UTC https://padlet.com/tay17001125/5fzwn4zu29r9/wish/192059326 tay17001125 https://padlet.com/tay17001125/5fzwn4zu29r9/wish/192069835 2017-09-28 13:47:46 UTC https://padlet.com/tay17001125/5fzwn4zu29r9/wish/192069835 har17003010 https://padlet.com/tay17001125/5fzwn4zu29r9/wish/192071815 Vector grouping is known as vector quantization which is a classic technique of signal processing. It allows the modeling of probability density functions by the distribution of prototype vectors. It works by dividing a large set of points (vectors) into groups having approximately the same amount of points close to them. ]]> 2017-09-28 13:50:52 UTC https://padlet.com/tay17001125/5fzwn4zu29r9/wish/192071815 willbunce99 https://padlet.com/tay17001125/5fzwn4zu29r9/wish/192071823 Vectors are simple image file formats whereas BMP's contain pixel information (Color and Position) vectors simply contain an equation, this equation contains the information to make up the image, due to this vector images can be scaled drastically simply by changing integers in the equation.]]> 2017-09-28 13:50:53 UTC https://padlet.com/tay17001125/5fzwn4zu29r9/wish/192071823 tay17001125 https://padlet.com/tay17001125/5fzwn4zu29r9/wish/192071828 Vector graphics are comprised of paths, which are defined by a start and end point, along with other points, curves, and angles along the way. They are stored as mathematical equations, which are infinitely scalable so that resolution is not a problem when enlarging the image.]]> 2017-09-28 13:50:54 UTC https://padlet.com/tay17001125/5fzwn4zu29r9/wish/192071828 tay17001125 https://padlet.com/tay17001125/5fzwn4zu29r9/wish/192088601 Vectors are often used for simplistic designs such as company logos, as vectors are only shapes, therefore unless you are willing to put in a lot of time and are skilled in layering the vectors (which would massively increase the file size), you cannot create complex images as it would mean spending too much time where you could be doing it on a different program.]]> 2017-09-28 14:18:32 UTC https://padlet.com/tay17001125/5fzwn4zu29r9/wish/192088601 tay17001125 https://padlet.com/tay17001125/5fzwn4zu29r9/wish/192094149 2017-09-28 14:27:14 UTC https://padlet.com/tay17001125/5fzwn4zu29r9/wish/192094149 willbunce99 https://padlet.com/tay17001125/5fzwn4zu29r9/wish/192094350 A bitmap is a type of image made up from pixels, inside the file the bitmap must store the color and position of every single pixel displayed at any given time, meaning that if an image is in 1920x1080 resolution there are 2,073,600 individual pixels, all of which may have a different color and position. This means that Bitmaps are typically much larger in file size than their counterpart, vectors.]]> 2017-09-28 14:27:32 UTC https://padlet.com/tay17001125/5fzwn4zu29r9/wish/192094350 tay17001125 https://padlet.com/tay17001125/5fzwn4zu29r9/wish/192094418 Bitmap images do not scale well. Bitmaps are an image comprised of pixels, that have metadata stored about them in the image files. this data includes things like colour depths, opacity and position. due to the fact that the computer cannot "create" pixels that would be accurate to the picture, Bitmaps get more pixelated, which means that the overall image looks more blocky and is a lower resolution.]]> 2017-09-28 14:27:39 UTC https://padlet.com/tay17001125/5fzwn4zu29r9/wish/192094418 har17003010 https://padlet.com/tay17001125/5fzwn4zu29r9/wish/192096243 This is known as group bitmap indexing, which is meant for enabling faster subset search and content-based association rules retrieval  in relational databases. The main idea of group bitmap indexing is to build a binary key, called group bitmap key. the group bitmap key is to represent a content of a item set.  ]]> 2017-09-28 14:30:18 UTC https://padlet.com/tay17001125/5fzwn4zu29r9/wish/192096243 tay17001125 https://padlet.com/tay17001125/5fzwn4zu29r9/wish/192099902 2017-09-28 14:35:58 UTC https://padlet.com/tay17001125/5fzwn4zu29r9/wish/192099902 tay17001125 https://padlet.com/tay17001125/5fzwn4zu29r9/wish/192100812 2017-09-28 14:37:22 UTC https://padlet.com/tay17001125/5fzwn4zu29r9/wish/192100812 tay17001125 https://padlet.com/tay17001125/5fzwn4zu29r9/wish/192104778 2017-09-28 14:43:17 UTC https://padlet.com/tay17001125/5fzwn4zu29r9/wish/192104778