Vector images are different paths that are usually defined with a start and an end point. Along the way joined with lines, curves and different shapes to create an image. The vector paths can be created from triangles, squares and circles to create a very basic or complex image.
Simple Vector - jack-y-zhang
Complex Vector - ragingcephalopod
I have done some of my own vector images using Adobe Illustrator:
RASTER IMAGES;
Raster Images are made up with set grids of dots called pixels. Each of the pixels in a raster image are assigned their own colour value. You can't really stretch a raster image because effectively it will wreck the creation, the pixels get blurry and stretched resulting in a very messy image.
Complex Raster - Jürg Lehni
I have done some of my own raster images using Piskel:
THE PIXEL;
A pixel is thousands of assigned colour blocks put together in a specific way to create an image barely noticeable that it is pixel unless zoomed into. A pixel image is usually very blocky and edgy if it is created as the retro style, but what you can create with pixel is inevitable, it just takes patience to create an image barely noticeable that it is pixel.
COLOUR DEPTH;
Colour depth refers to the number of bits per pixel on a computer monitor to represent a specific colour. As technology and available system resources has increased so has the colour depth. Here is the history of colour depth in computers:
1-bit (2 colours)
2-bit (4 colours)
4-bit (16 colours)
8-bit (256 colours)
16-bit (65,536 colours)
24-bit (16,777,216 colours)
32-bit (16,777,216 colours+Alpha channel ( 4,294,967,296 colour combinations))
48-bit (281,474,976,710,656 colours)
COLOUR MODELS;
A colour model is a system for creating a full range of colours from a small set of primary colours. This is used in Graphic Design based on different models. The model you pick depends on the range of colours you need in a graphic and whether it is going to be output to print media or to screen.
There are two different kind of colour models, one is the RGB Colour Model, and one is the CMYK Colour Model.
The one to the left is the RGB Colour Model, and the one to the right is the CMYK Colour Model. RGB is an Additive colour model for computer displays. It uses light to display colour. Colours result from transmitted light. EG- Red+Green+Blue=White.
CMYK is a Subtractive colour model for printed materials. It uses ink to display colour. Colours result from reflected light. EG- Cyan+Magenta+Yellow=Black.
RESOLUTION;
Resolution refers to the number of pixels in an image. Resolution is sometimes identified by the width and height of an image as well as the total number of pixels in the image. an image that is 2048 pixels wide and 1536 pixels high (2048X1536) contains (multiply) 3,145,728 pixels (or 3.1 Megapixels).
As the megapixels in the pickup device in your camera increase so does the possible maximum size image you can produce. This means that a 5 megapixel camera is capable of capturing a larger image than a 3 megapixel camera.
ANTI-ALIASING;
Anti-aliasing is the smoothing of the image or sound roughness caused by aliasing . With images, approaches include adjusting pixel positions or setting pixel intensities so that there is a more gradual transition between the color of a line and the background color.
With sound, aliases are removed by eliminating frequencies above half the sampling frequencies.
ASPECT RATIO;
The aspect ratio of an image describes the proportional relationship between its width and its height. It is commonly expressed as two numbers separated by a colon, as in 16:9. For an x:y aspect ratio, no matter how big or small the image is, if the width is divided into x units of equal length and the height is measured using this same length unit, the height will be measured to be y units.
FILE FORMATS - bmp, png, gif, tiff, jpg, psd, eps and ai;
BMP - The BMP format is a commonly used raster graphic format for saving image files. It was introduced on the Windows platform, but is now recognized by many programs on both Macs and PCs.
PNG - A file format for image compression that, in time, is expected to replace the Graphics Interchange Format (GIF) that is widely used on today's Internet.
GIF - An image file format commonly used for images on the web and sprites in software programs. Unlike the JPEG image format, GIFs uses lossless compression that does not degrade the quality of the image.
TIFF - a common format for exchanging raster graphics (bitmap) images between application programs, including those used for scanner images. A TIFF file can be identified as a file with a .tiff or .tif file name.
JPG - JPG is a file extension for a lossy graphics file. The JPEG file extension is used interchangeably with JPG. JPEG stands for Joint Photographic Experts Group who created the standard.
PSD - a layered image file used in Adobe PhotoShop. PSD, which stands for Photoshop Document, is the default format that Photoshop uses for saving data.
EPS - EPS is a file extension for a graphics file format used in vector-based images in Adobe Illustrator.
AI - AI is a file extension for a vector graphics file format used in an Adobe Illustrator drawing. Adobe Illustrator is a popular vector graphics-based drawing program.
COMPRESSION;
Compression is a reduction in the number of bits needed to represent data. Compressing data can save storage capacity, speed file transfer, and decrease costs for storage hardware and network bandwidth.
Compression is performed by a program that uses a formula or algorithm to determine how to shrink the size of the data.
IMAGE CAPTURE DEVICES;
The process of obtaining a digital image from a vision sensor, such as a camera. Usually this entails a hardware interface known as a frame grabber, which captures single frames of video, converts the analogue values to digital, and feeds the result into the computer memory.
OPTIMISING;
Computers to increase the computing speed and efficiency of a programme, by re writing instructions.
STORING AND ASSET MANAGEMENT;
Digital asset management (DAM) consists of management tasks and decisions surrounding the ingestion, annotation, cataloguing, storage, retrieval and distribution of digital assets.
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