Adobe makes another program called Illustrator that is designed to work with vectors. As far as computer images are concerned, Vector images can be enlarged and reduced (scaled) without any real loss in quality. The lines, arcs circles, etc can easily be manipulated with points and handles to change the shape and keep a very straight and clean edge. Vectors by definition are lines at a certain distance and angle. The other type of image you can make is a vector image. Now that you know a bit about raster images and pixels, I’m going to show you something different. (But do watch out for overpriced junk!) How Vector Files are Different from Raster Files That’s why there is a such a cost difference in printers, ink and paper. I can print the same image on the same printer and use 2 different papers and they will look totally different. For example I can print a 300dpi image on my $50 cheap inkjet, and I can print the same image on my $800 printer – will they look the same? No, because all printers are not created equal. Now of course a lot of this is subjective and open to discussion. If you were to look at a printout of a web image, it will not be very sharp (especially compared to a high quality image). PPI or “Pixels per inch” The images you are looking at on the internet work at 72 ppi because that’s the highest resolution that (average) monitors will show. See what I did there? I threw a new term at you. What works for a web image vs what works for a high end photograph are 2 different things. Now different jobs can require different resolutions. It also means that if you design a 4×6 mail out postcard for you boss, and he likes it so much he wants to use it for a billboard – you’ll have pixel issues. What this all means is that you want to work with the right size image for the job. I’ve taken a small section of the photo and then enlarged it so that you can see the pixels that make up a small part of the image – in this case her eye.Īnd you could keep enlarging from there, but I think you get the ‘picture’. She posed for this so that you could understand how Photoshop works. Here’s a visualization of how pixels work in the real world. The photo you want to use is only 4″圆″, but your poster is 36″x48″ – that means you’ll need to enlarge that image about 9 times – and each pixel that looks good in the 4×6 image will be 9 times bigger in the poster. So what is a pixel and why should you care? Let’s say that you are designing a poster for your new business. In theory, a camera that has 24 megapixels will take a better and sharper photo. So when you have a camera that has 12 megapixels, that means the image has about 12 million little colored squares. When you take a digital photograph, it is recorded by turning the real world into pixels (little colored squares). Raster is a fancy term that means you are dealing with Pixels (PICture ELements). One of the most important concepts to know about is “Raster”, and how it affects what you are working on. You can also check this out in the video at the end of this tutorial. This will give you a good understanding that’s needed before working through the rest of the tutorials and working your way up to doing layouts for magazine ads (or retouching Granny’s old photos). So this lesson will deal with the benefits and limitations of raster imaging. For example, is Photoshop the right tool for the job? How is it limited? Can I just take someone’s head off and move it onto someone else’s body in 2 seconds just like on TV? (short answer: no).
#Raster image editor software
For those of you that have never used imaging software or graphics software, there are some basic concepts that should be covered.
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