Basics of Photoshop, Photoshop Elements Basics

What is Photoshop?

Photoshop is raster based software we can work on the images as well as graphic there is also some tools which is use to draw a vector images.

There are two types of images used by graphic design programs

(1) RASTER

(2) VECTOR

RASTER:

A raster image is made up lots of little dots/pixels, photo editors such as Adobe Photoshop are raster based & great for picture rich, full color images like photographs. Raster based programs do have some drawbacks though:

> Imagine a square 1 inch x 1 inch, if this square has been created at 300dpi then this will have 300 dots/pixels within it. The computer must keep track of all the zeros and ones that make up those 300 dots/pixels, this can result in large file sizes which can be memory intensive when editing, the spec of your PC/MAC will determine if this causes you problems or not.

> Raster based images can not resize well, When we resize a low resolution raster image the pixels just get bigger making the image become visible distorted and unclear One solution to this is to make sure the image is created at high resolution, an image at a minimum of 300dpi will resize quite well and keep fairly good clarity, however, it will only enlarge so much.

VECTOR:

Vector based programs such as Adobe Illustrator approach image creation in an entirely different way and do not render images on a pixel by pixel basis. Using the same example as above the 1 inch x 1 inch square would only be made up of 4 dots/pixels, one on each corner. These “vector points” allow the computer to play connect the dots, each vector point has information telling the computer how to connect each point with straight or curved lines, and what color the inner space should be.

Because the computer only has to keep four points in its memory, it is much easier for the computer to edit vector based images as file sizes are really small. If you re size a vector based image it loses little or no detail, the vector points spread out and the computer just redraws the image. Vector images are ideal for logos as they can be re sized and adjusted without losing clarity, so when looking for a logo designer ensure the final files produced are vector based.

Key Points About Vector Images

• scalable

• resolution independent

• no background

• cartoon-like

• inappropriate for photo-realistic images

• meta files contain both raster and vector data

Basic Process and activities of the Trade

All these adjustment work with every kind of images. That's why skilled photographers feel sorry for people who toil away with RAW files just so they can correct exposure and white balance later. You can do it all to any JPG image in Photoshop without all the hassle.

The activities below imagine you have at least a basic navigational expertise with Photoshop. You can get that from any book or community college class, or even the built-in help!

Photoshop has been approximately since the 1980s when it was only used by professionals. It therefore uses terms from traditional professional photography and the commercial printing press trades. Often these terms are exactly the opposite of what you'd expect! The most visibly labeled tools are sometimes the worst way to do things, so read up below.

People spend entire careers learning Photoshop. There is more to learn than any single human will be able to master. Each of us learns what's relevant to our own work.

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