In order to start working with graphics you need to understand some basic definitions that will be used during this tutorial. The terms described here are only a light brush of all the things that a professional is required to know, however they are enough to get started and produce some nice semi-pro works of art.
1. Brief explanation on image file formats: There are many types of image file formats used in the industry, some are more familiar and common such as BMP(Bitmap), JPG (JPEG), GIF and PNG which are often used in web design, software design, printing industry and other common applications. Others are less knows and more specific such as TIFF, CGM, DWG and they are mostly used for specific applications such as schematic drawings, 2 and 3 dimensional software and more, where the image is required to preserve the information AS IS or contain unique parameters that the program handling it requires. The main difference between the formats is what is known as compression methods. that means the way that the colors in the image are handled and compressed in order to reduce its size and make it more portable. The higher the compression level, the more likely that the original image will lose its original quality. For more information on different file formats visit: en.wikipedia.org/wiki/Image_file_formats
2. Image size and measurements. Image measurements and size are usually defined by ‘px’ (short for pixel). A pixel unit represents the smallest element of a digital image, and it hold a value that indicates a blend of the 3 basic colors Red, Green, Blue or a blend of Black and White. There are other measurement units that vary in use such as Dots, Points, Millimeter, Centimeter, Inch etc’. In this tutorial we will only use the pixel unit since it is the most common unit used in the industry.
3. Colors. Digital colors are a representation of the real colors, and are digitally blended in the same manner. The 3 main colors are Red, Green and Blue and they are often referred to as RGB. Each color has a scale which indicates its mixture with the Black color and by that giving it its intensity; the scale goes from 0 to 255, 0 being completely Black and 255 being the color in its purest form. There are also 3 other values that will affect the color intensity and those are the hue, saturation and luminous values, but those will not be discussed in this tutorial. The two ways to describe the colors of an image are RGB and Grayscale, meaning that RGB is a colored image and Grayscale being a black and white image.
Continue to part 3: Basic Features In The Software ->