• Home
• Lesson 1
  
• Lesson 2
• Lesson 3
• lesson 4
• Ink Jet Printing
• Resources

Continuing Education
Clark College
Photoshop 2
Instructor:
Garry T. Stasiuk













































The Hue Slider
Chooses the color around the circumference of the color wheel.
Move To the right,
you go Clockwise around the wheel.
Move the slider to the left you choose color moving counter clock wise. At either end you are 180 degrees from the starting point
The Saturation Slider
Chooses color along the radius, towards the center of the circle.















































































<




















REMEMBER, always work with a copy...
NEVER use the original picture.

As soon as you load the picture, use the menu item "File/save as" to rename and save a copy of the picture you are "editing" To a non lossy format like Cutitout.tif   ...














In PhotoShop Elements you can turn on "hints" using the menu item Window/Hints...
When Hints is checked, the Hints palette will appear with definitions, and links to instructions on how to use the tool.
The Hints will appear in the Hints palette when you place your arrow over the tool in the tool box.






















































I always wanted to see Mount Everest up close... Ever since the 6th grade when I read
The Ascent of Everest by John Hunt. Expedition leader John Hunt's account of the first ascent of Mount Everest's summit in 1953 by Sir Edmund Hillary and Sherpa Tenzing Norgay.

The closest I have been so far is Lhasa, Tibet about 400 km (250 Miles)

We didn't have enough time to make the trek... in 2005, they hadn't even started to build the new road to Everest just so they could do the Olympic Torch Relay for the 2008 games!

First a word about color

Additive Colors
A TV, or a Computer Monitor makes colors from light emitted directly from a source.	The Additive colors (RGB) R. Red G. Green B. Blue are the primary colors. When they are combined they make the secondary colors Y. Yellow M. Magenta C. Cyan
Subtractive Colors	Anything that reflects light -- like the ink printed on a piece of paper --- produces color by Subtracting light. The adbsorbed or subtracted light creates its range of colors from the mixing of various dyes and pigments.

Color Control in Photoshop

The Visible-Color Spectrum Wheel

You can decrease the amount of any color in an image by increasing the amount of its opposite on the color wheel--and vice versa. Similarly, you can increase and decrease a color by adjusting the two adjacent colors on the wheel, or even by adjusting the two colors adjacent to its opposite. For example, in an RGB image you can decrease magenta by removing red and blue or by adding green. This results in an overall color balance containing less magenta.

Here is a detailed article from Photoshop Tips & Tricks
Fixing a Color Cast with Photoshop CS2

L - A - B not LAB

Another way of working with colors (Photoshop Only)

SELECTIONS

"When you want to edit a particular area of your image without affecting other areas, you can select the area you want to change. You can also make selections when you want to copy or duplicate an area of your image.

Photoshop indicates a selected area with a border of moving dashes, called a selection marquee the "marching ants." The area outside the selection border is protected while you move, copy, paint, or apply special effects to the selected area.

Selection or extraction tools available

Photoshop Elements	Photoshop CS  +++
On the Tool Bar lasso polygon lasso magnetic lasso Rectangular Marquee Eliptical Marquee Magic Selection Brush The Magic Wand Menu Image > Magic Extractor	On the Tool Bar lasso polygon lasso magnetic lasso Rectangular Marquee Eliptical Marquee Single row Marquee Single Column Marquee The Quick Selection * CS3 The Magic Wand Menu Filter > Extract
In CS3 there is a new tool that is available from the options bar when you launch any of the above It is called "Refine Edges"

There are many ways to make selections...

In this example, I want to make color changes only to the shirt.
Using the magnetic lasso tool, I can quickly select the shirt...

Using the Magnetic lasso, we selected the shirt, you'll see that it is surrounded with the marching ant effect.
Directions are available via the hint palette or in Photoshop CS (1, 2 or 3) look in the on-line manual under Magnetic Lasso.
You can also use the Lasso, Polygon Lasso, or the Magic Wand to select the object, in this case, the shirt. You can use this techique to fix red eye or re-paint a wall or house...

I recommend you start with the polygon lasso or the magnetic lasso...

The picture below is showing how hints work in Photoshop Elements



 one way to learn how to use these tools...

Practice, practice, practice....
It's not hard to do, 5 minutes or so and the selection process is done...

Coloring A Shirt

Once the shirt has been selected, toggle the menu item
Layers/New Adjustment Layer/ "Hue/Saturation"

Click on Okay when the New Layer Dialog box pops up.

The Hue/Saturation control box should appear.
When working on a large area like the shirt, or a whole photograph just using Hue & Saturation can lead to a strange mix of colors... especially if the changes are large. When fixing red eye the color changes are subtle and only affect a few pixels. Colorization is designed to work with black & white images.

Click the colorize box to active it.  If the foreground color is black or white, the image selected is converted to a red hue (0°). If the foreground color is not black or white, the image is converted to the hue of the current foreground color. The lightness value of each pixel does not change.  Moving the Hue and Saturation sliders will evenly change the color of the shirt to colors of your choice other than red.



When you are satisfied with the color click okay, then "flatten" the layers to one layer using the menu item

Layer > Flatten Image
Now, don't forget to save the edited picture... 
Like RedShirtInTiennamanSquare.tif  Or what ever you wish... 


Compositing....  Adding a new "object" into a picture Here's how to put me or yourself into the picture...

Instead of using the supplied extraction tools, I did this the old fashion way... cutting out by "hand"  Pixel by pixel... Much easier these days with the new "magic tools"

... Let the computer do all the work!!!



This is a picture of your instructor at Tiennaman Square, Bejing, 1997 digitized from footage shot with a digital video camera.

It's actually quite easy to do ... Practice makes perfect...
Don't forget that the hint palette, or your manual has good information on how to use the new extraction tools

The whole process goes pretty quickly... Use the magnifying glass to get a closer view of the subject/object your are cutting out


The example is from Photoshop Elements 2.0


In Photoshop Elements 6  there is a cut out tool called the "Magic Extractor" in Photoshop CS there is a filtre called "Extract" and a special tool called "refine edges" that virtually eliminates the ghosting around objects extracted the "old fashion" way...     

Scribble and let the computer do the calculations..



























Once you have the object cut out, you can use the
move tool to move the object into the background picture,
in this case mount Everest.

Just put the pointer over the object you want to move.
Hold down the "left" mouse buton, and drag the object over the background picture

                      


Subtracting an "object" from within a picture.

Now we want to subtract the climbers in the background...

We are using the clone tool.  Notice that there are diagonal patterns... a frozen waterfall and rock ridges









so we'll want to "paint" with the clone tool diagonally with those features covering the folks in the background...

   and we are done!             

You don't want to miss this Tutorial!!!

Here is a link to a tutorial on how to color tone "difficult" selections Tough Selections Made Easy A Unique Approach to Tonal Selections by Charles Cramer

Fixing Barrel Distortion

When using a wide angle lense some pictures will appear distorted... Vertical lines are bent inward as if they are wrapped around a barrel!!!!





Use the Perspective or distort, or  Skew menu item

In PhotoShop Elements toggle

Image/Transform/Perspective

In PhotoShop use the menu

Edit/Transform/Perspective





Once you have the walls straight click on the check mark in the Options
bar, or the circle slash to undo the perspective change..





There are specialty programs called "plug-ins" that can more accurately correct Barrel Distortions and other picture defects

Check out these web pages...


http://www.creativepro.com/story/feature/17837.html


http://www.humansoftware.com/pages1200/PhotoFixlens/HSphotofixlens11.html



Garry T. Stasiuk March5, 2008

Additive Color

Mixes Light

Subtractive Color

Mixes Dyes and Pigments
























































Alex Walker
design@sitepoint.com
Editor, The SitePoint Design View




















































































































































The ascent of Everest by John Hunt