BasicsFILIPINO INSTITUTE

BAHRAIN

Engr. Josef “Yousuf” L. Jimenez - Trainer

INTRODUCTION

What is Adobe Photoshop

• Photoshop is a graphics editing program used to create and modify digital images developed and published by Adobe Systems for Windows and OS.

• Photoshop was created in 1988 by Thomas and John Knoll.

• Can be used to: Create original artwork Manipulate images Retouch photographs Repair Damage Images Create graphics for website

Why do we use Photoshop?

You can express yourself creatively. You can create different graphic design projects. You can restore old photos. You can artistically combine graphics with text. You can make art works using brushes. You can change the color of a picture. You can correct photography mistakes. You can do T-shirt designs. You can transform pictures artistically. You can have personal fulfilment.

Features

• The .PSD (Photoshop Document), Photoshop's native format, stores an image with support for most imaging options available in Photoshop. These include layers with masks, color spaces, ICC profiles, transparency, text, alpha channels and spot colors, clipping paths, and duotone settings.

• Photoshop has the ability to read and write raster and vector image formats such as .EPS, .PNG, .GIF, .JPEG, and Fireworks.

Digital Images

Digital image: Is a representation of a two-dimensional image using ones and zeros (binary).

• Made up of dots called pixels.• Depending on whether or not the image resolution is fixed, it

may be of vector or raster type. The term "digital image" usually refers to raster images.

Image Resolution: Spacing of pixels in an image, measured in ppi (pixels per inch) or dpi (dots per inch)

Image Size: Physical dimensions of an image, measured in pixels (width x height)

Understanding Image Pixels

From Your Digital Camera To Your Photo Printer, It's All About The Pixels

• "pixel", a short form of two words, "picture element“

• the elements which make up our digital pictures.

• what you're really see is a massive collection of colored squares – too small for the eyes to see, yet the photograph you're looking on screen

What is this?

A butterfly

RGB and Color Channels

• you know that every color in a digital image is made up of some combination of the three primary colors of light?

RGB and Color Channels

• It doesn't matter what color you're looking at on your screen. It's being made up of some combination of those three colors. You may be thinking, "That's impossible! There's millions of colors in my image.”

• How can you create millions of colors out of just red, green and blue?"

• By using multiple shades of red, green and blue! The more shades of each color you have to work with and mix together, the more colors you can create.

• If all you had was pure red, pure green, and pure blue, the most you could create would be seven different colors, including white if you mixed all three together:

RGB and Color Channels

What Does The Term “8-Bit” Mean?

• If you had,256 shades of red, 256 shades of green, and 256 shades of blue - If you do the the math, 256 times 256 times 256 equals roughly 16.8 million.

• That's 16.8 million colors you can now create!

• And that's exactly what you get with an 8-bit image - 256 shades of red, 256 shades of green, and 256 shades of blue, giving you the millions of possible colors you usually see in a digital photo

8 – Bit Image

Bitmap Format and File Extensions

Adobe Creative Suites

Photoshop has strong ties with other Adobe software for media editing, animation, and authoring.

Conclusion• Photoshop is the current market leader for commercial bitmap

and image manipulation software, and is the flagship product of Adobe Systems.

• Photoshop has strong ties with other Adobe software for media editing, animation, and authoring.

• Photoshop functionality can be extended by add-on programs called Photoshop plugins which act like mini-editors that modify the image.

• A more user-friendly interface and new tools such as the "red-eye" reduction brush were aimed firmly at the more casual image editor.