What are raster images?_Mastering Prezi for Business Presentations-QQ阅读男生轻小说网

书名：Mastering Prezi for Business Presentations
作者名：Russell?Anderson-Williams
本章字数：247字
更新时间：2021-08-13 18:14:43

What are raster images?

A raster image is simply an image made up of tiny pixels of color. Depending on the size of the image there will be hundreds, or even thousands of different pixels placed together in the right way to form the image you see.

In the following raster image, you can see that at normal size it looks great, and there is lots of different shading. However, the right-hand side shows that when you zoom into this image using Prezi, you will start to see the individual pixels that make up the shaded areas. This degrades the quality of the image when viewed at this size.

The preceding image has been saved as a PNG (Portable Network Graphics) file using the much loved Adobe Photoshop.

Some other raster graphics editors you could use to create raster images are:

KolourPaint
GIMP
GrafX2

Note

All of the preceding raster graphics editors have their own advantages over one another, so I'd recommend you take 15 minutes out of your day to research them and see which one you would prefer.

Raster file formats

I mentioned that the example image shown previously was saved as a PNG file which is one of the formats Prezi will accept through the insert image menu option. You probably know already that Prezi will also accept JPEG (Joint Photographic Experts Group), GIF (Graphics Interchange Format), and, PDF (Portable Document Format) images, "but what do these different files mean?" I hear you shout!