The resolution of an image is how many pixels there are in it. Resolution is identified by the total number of pixels. If an image has a lower resolution when it is stretched and made bigger on a computer screen it becomes pixilated. If it has a higher resolution the picture is better quality and can be stretched more without becoming pixilated.
The resolution needed for an image to be put on a website is 72 pixels per inch. If it is larger than this, the web page will take longer to load.
The size of a picture/image is its actual width and height when printed. The image size you see on the screen will not be the same when the image is printed. Based on the resolution of the image and the screens resolution the picture will look bigger or smaller.
Vector images are images made of individual objects. They are not considered using pixels and are higher quality. These objects can be points connected by either a straight line or a curve. Each object in a vector image can be changed or resized without any quality loss. Vector images are very important because they are used for maps and company logos since these graphics need to be resized frequently. The outline, color and fill of each object can be changed yet the basic shape will not be changed. Also, vector images don’t have a white pixel background so you can put an object on top of another and the one beneath will not be blocked. These types of images are important because they are very small files. The file only contains the mathematical equation that determines the shape of the lines in the image. It does not contain the image itself. Since the file is smaller it won’t take up much space on a computer.
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