Task 2-Image File Types:

1. Find out what these propeties of image file types mean:

Pixel  Dimensions- Pixel Dimensions are the number of pixels wide and the number of pixels tall of a sensor. They are multiplied to find the total number of pixels on a sensor. 

Dpi Resolution (Dots per inch)- Dots per inch (DPI) is a measure of a printing or video dot density, in particular the number of individual dots that can be placed in a line within the span of 1 inch (2.54 cm).

Quality(of an image)-Image quality in a photograph or on a monitor we may look at sharpness or resolution, good contrast, correctness of color, gradation from black to white with what is sometimes called "long scale,"

Comression Settings-  The reduction of the volume or mass of something by applying pressure, or the state of having been treated in this way. 

2. Find out what these are and what the differences between them are:

Bitmap/Raster-Bitmap graphics are made up of pixels of different colours.

Vector-Vector graphics are made up of objects.

The Differences are: A vector image uses geometrical formulas to represent images. The other way of representing graphical images is through bit-maps in which the image is made up of a pattern of dots (note that bit-maps are often referred to as raster graphics). Programs that allow you to create and manipulate vector graphics are called draw programs and programs that manipulate bit-map images are called paint programs.Vector graphics are more flexible than bit-maps because they can be easily re-sized. In addition, images stored as vectors look better when displayed on high resolution printers and monitors. Bit-map images look the same, regardless of the resolution of the display. Another advantage of a vector graphic is that they often require less memory than bit-maps do.

3.

.tiff--TIFF stands for Tagged Image File Format. Files with the .tiff extension contain graphics containers that store vector and raster images in both lossless and lossy compression formats. The TIFF file format supports any image resolution and black and white, gray-scale and color images. The TIFF file format was created as a standard image format to save high-quality images that could be used across multiple computer platforms. The .tiff file extension is interchangeable with the .tif file extension.

.jpg-- JPG files, also known as JPEG files, are a common file format for digital photos and other digital graphics. When JPG files are saved, they use "lossy" compression, meaning image quality is lost as file size decreases. JPEG stands for Joint Photographic Experts Group, the committee that created the file type.JPG files are commonly referred to as JPEG images. JPEG is the acronym for Joint Photographic Experts Group. Many bitmap images are saved in .jpg format in order to compress the files. This makes it easier to transfer or download the files and use them on the Web. The JPG file format is based on a 24-bit color palette, however, these files tend to drop information when they are decompressed. The higher the rate of compression was when the JPG file was created, the more the quality of the image will be affected when the file is decompressed.

.png--PNG is an acronym for Portable Network Graphic. The PNG file format offers a compressed lossless file format for graphic bitmap images. PNG files are very similar to GIF files. They contain bitmaps and offer a lossless compression algorithm but they do not contain copyright limitations. Unlike GIF files, which can only provide for fully transparent or fully opaque pixels, PNG files provide for 8-bit transparency. While PNG files cannot be animated like GIF files can, the MNG file format (a file format related to PNG) does offer animation capabilities. PNG is becoming the preferred image format for graphics on the Web. 

.bmp--Short for "Bitmap.  The BMP format is a commonly used raster graphic format for saving image files.The BMP format stores color data for each pixel in the image without any compression. For example, a 10x10 pixel BMP image will include color data for 100 pixels. This method of storing image information allows for crisp, high-quality graphics, but also produces large file sizes. The JPEG and GIF formats are also bitmaps, but use image compression algorithms that can significantly decrease their file size. For this reason, JPEG and GIF images are used on the Web, while BMP images are often used for printable images.

.gif--GIF files are image files that can be created by a number of different graphics applications. Files with the .gif file extension can contain up to 256 colors. GIF files are often used in web graphics and are commonly used to create graphic text for websites. While the pixels in a GIF file can be transparent, they must either be fully transparent or fully opaque when creating or editing the image. They cannot be alpha-blended, like with e.g. PNG images. GIF files are also commonly used for website animations since the images within a GIF file can be animated. 

.pdf--PDF stands for portable document format. This universal file format was created by Adobe Systems in 1993. PDF files are able to preserve the formats, fonts, drawings and other file components of virtually any electronic document file and present it in a universal format.PDF files are cross-platform files, which means they are able to be read on both Mac and Windows operating systems, as well as the new Android platform found in many of today's cell phones. Many of today's eBook publishers use PDF format for publishing. PDF files are also used by businesses and individuals to distribute documents and literature.