|Pixels? What are they?
You may think you don't know what a pixel is, but, if you've ever seen a card stunt at a sports event, you probably do! Just as individual sports fans hold up a colored card in the stadium, individual pixels light up on your screen to form a pattern. (picture, top)
A pixel is simply the individual point of color on a digital image. Look at the pair of pictures at the right. The picture at the far right is a close-up showing the individual dots or pixels.
A pixel doesn't have a particular size. It is an abstract represention of a specific coordinate example: (133,57), like a point on a map. Just as individual sports fans hold up a colored card in the stadium, individual pixels light up on your display to form a pattern. The only difference is the size of the point when it is displayed. Pixel indicates only a point on a grid, not the size of the point*
And this is important to me WHY?
We use a pixel as a unit of measurement for images on the web. No more inches or centimeters. Pixels! On a computer monitor, there are 72 pixels per inch....if you need to convert pixels to inches for a better idea of size.
There is a size limit on the images that can be uploaded to your site. Failure to upload because the image is too big is frustrating and completely preventable.
You will find authoring your pages a much easier task if you can control the size of your images.
We use pixels to measure the H x W of graphics.
Pixels are points of light on a monitor.
Pixels have no set size.
On the web, there are 72 pixels per inch.