Monday, April 30, 2012

What's an SVG?


What is an SVG, and what makes it so special? Well, SVG stands for scalable vector graphic. Graphic images fall into two categories: raster images and vector images.

Raster images are what we’re all used to, and are the images we usually see when we browse the internet. They are composed of pixels – if you zoom in on a picture, you’ll see tiny colored squares. Maybe you’ve never heard them called raster graphics before, but everything we take on a digital image is also made up of those tiny boxes. This is why we say things are pixelated when we are zoomed in on an image. High resolution refers to an image with tons of pixels, and tons of detail. These images (and videos) are larger in file size, but can be viewed much larger. The file types you’ll usually see are .png, .jpg and .bmp.

So what is a vector image? Well, a vector is basically a line, curve, point or other simple shape. It’s not made up of pixels, and because of this they can be infinitely small or infinitely large and not lose any quality – they don’t get pixelated. The finer details are more complex and get into coding, which isn’t necessary to understand which one to use. If you’re curious, find an SVG file and instead of opening it in a cutting program or Illustrator, open it in a text editor (Textedit for Mac, Notepad for Windows). You’ll see lines and lines of code, and that code is telling where lines, dots, colors and everything else should be assigned. People can actually read this code, find errors and fix SVG files. Sounds kind of dull, right? Well, somebody has to do it, and we get to reap the benefit of their work.

What does this mean for your cutting machines and software? Well, your software can read that code and tell the cutting machine where to cut. Raster images don’t give very good directions to a cutting machine – it wouldn’t know where to start. A vector image tells the machine where everything should be cut, and it does its job well. Some software, like Make the Cut, can do something called a pixel trace, where it takes a raster image and turns it into something the software can use to cut out.

SVGs are pretty handy, and are growing to be more commonly used with cutting software. You can find them for free, make them yourself (with software like Adobe Illustrator or Inkscape) or find them at websites like Lettering Delights. If you’re interested in expanding the way you scrapbook or just the way you craft, you might want to take a look at some die cut machines and play with some SVG files, they’re a lot of fun.

-- The Cut Source

No comments:

Post a Comment