1. CSC020, Computer Graphics
Retouch & Related 1

2. Exposure Retrieve retouch folder from Outbox/Resources/retouch
Open ParsonShadow.jpg
Note face in hat’s shadow.
Image -> Adjustments -> Shadow / Highlights
Add curves graph for highlights, shadows n midtones 2

3. Exposure Check “Show More Options” Shadows brightens the shadow areas.
Amount increases luminance, keeps color ratios intact.
Radius gives number of pixels measured for correction.
Tonal width gives range of pixel values used for correction.
Highlights darkens the highly lit areas. 3

4. Exposure Continued
Midtone contrast sets amount of contrast in middle-light areas.
Black and white clipping set cutoff levels.
Color correction boosts or drops saturation.

5. Exposure Continued Try effect on entire image.
Note loss of contrast in rock shadows.
Try effect on figures after magnetic lasso selection of figures only.

6. Photo Filters Add a Photo Filter Adjustment Layer.
You might think cooling would be appropriate for the desert, but . . .
Warming or red filtering works better with the rocks.
Density adjusts the filter’s visual thickness.

7. Photo Filters
Try adjusting opacity and fill of this adjustment layer as well.

8. Correcting Overexposure in an Adjustment Layer
Delete the previous filter adjustment layer.
Add a Levels adjustment layer.
Use Blending Mode Multiply to darken.
Use Blending Mode Screen to lighten.
Descriptions here:
blending-modes.html

9. Correcting Overexposure in an Adjustment Layer
You can add multiple Adjustment Layers -> Levels -> Blending Mode Multiply for successive approximation.
Tweak opacity of final layer.
Merge Adjustment Layers when you are satisfied.
Select all layers
Right click
Scroll down

10. Correcting Backlit Photos
Close Photoshop files without saving.
In Bridge, select ParsonUnshavedDarkS210.
Do NOT open in Photoshop.
Edit -> develop settings -> camera raw defaults
Double click image
opens with camera raw.

11. Correcting Backlit Photos
Use sliders to correct for back lighting.
Open in Photoshop, compare to ParsonUnshavedDarkS210 Copy (original).

12. Correcting Backlit Photos – Manual Alternative
Edit -> Develop settings -> Clear Settings in Bridge.
Open ParsonUnshavedDarkS210 in Photoshop.
Add a Levels Adjustment Layer, adjust upper and midrange sliders for exposure.
To darken background, add a layer mask, Fill with Black, and then Brush with White to remove portions of the mask to lighten areas.
Filter -> Render -> Lighting Effects to add spotlights, etc.

13. Lens Blur Filter Reopen ParsonShadow (desert photo),
Duplicate Background Layer.
Select the layer’s image thumbnail,
Use Filter -> Blur Lens to add blurring.
Set blur filter to layer mask as reference.

14. Smart Gaussian Blur One of the most popular filters
Gaussian is normal distribution
(Bell curve)
The bigger the blur radius, the more blur
Start over with a Duplicate Layer of ParsonShadow.

15. Smart Gaussian Blur Start over with a Duplicate Layer of ParsonShadow.
Filter -> Convert for Smart Filter to create a filter with parameters you can tweak after you apply the filter.
Select an area before blurring, then Invert selection to select the surrounding image.

16. Smart Gaussian Blur Start over with a Duplicate Layer of ParsonShadow.
Filter -> Blur -> Gaussian Blur.

17. Removing Spherical and Chromatic Lens Aberrations
Open, Duplicate Layer for ParsonUnshavedD90.jpg.
Note spherical aberration.
Filter -> Convert for Smart Filters.
Use Filter -> Lens Corrections

18. Removing Spherical and Chromatic Lens Aberrations
Use Filter -> Lens Corrections to remove Spherical Aberration.
Use Scale to restore foreground image size.
Lens Correction also removes Chromatic Aberration.

19. Sharpen Focus Open, Duplicate Layer for ParsonFocus.jpg.
Note out of focus professor.
Select professor’s pixels.
Filter -> Sharpen -> Smart Sharpen.
We won’t make a smart layer -- too time consuming.
Amount 213%, pixels 10 seems in the ballpark.
Toggle Preview on and off.
“Pixels” says where to look for “stray photons.”
“Amount” is how far to move them.

20. Unsharp Mask Open, Duplicate Layer for ParsonFocus.jpg.
Note out of focus professor.
Select professor’s pixels.
Filter -> Sharpen -> Unsharp Mask.
We won’t make a smart layer -- too time consuming.
Amount 223%, pixels 4.6 seems tolerable.
Toggle Preview on and off.
I don’t like this one as much. 20

21. Duplicating Color Range of one Document in Another
Close All Photoshop, then from Bridge open ParsonShadow then ParsonFocus.
Duplicate Layer in ParsonFocus (target).
Image -> Adjustments -> Match Color.
Use ParsonShadow as the source.
Vary parameters to temper the effect. 21

22. Clone Stamp Across Layers and Images
Open fresh copies of ParsonShadow and RohrbachCenter.
Using multiple layers, Clone Stamp from one to another.
Using multiple image files, Clone Stamp from one to another. 22

23. Clone Stamp Across Layers and Images
The Clone Stamp Tool paints with a sampled pixels of an image.
From the Toolbox, choose the Clone Stamp Tool.
In the Options bar, set the tool's tip size and hardness
Point the cursor at the image area you want to paint with, hold down [Alt] key, then mouse-click. You have just selected the source point for cloning.
Paint with the copied pixels.
Click: replicates the copied pixels
Clcik & hold: replicates starting at the copied pixels 23

24. Clone Stamp Aligned Gadget
The "Aligned" gadget in the Options bar (checked by default) forces the source point to follow your mouse, even after you complete a stroke. In other words, every new stroke continues the image started by the first stroke. 24

25. Clone Stamp Aligned Gadget
Deselecting the "Aligned" option starts the sample point back to its original location every time you release the mouse button. That is, every new stroke re-starts cloning your image from the source point. 25

26. Color Replacement In ParsonFocus -> Layer -> Copy Background.
Select the boring, washed-out shirt.
Image -> Adjustments -> Replace Color.
Use eyedropper to select source color
Select
Add to Selection
Subtract from Selection 26

27. Color Replacement Use Color Pickers to tune input-to-output.
Use Fuzziness to set color tolerance for input.
You can make teeth whiter, beards darker. 27

28. “Softening Focus”
Filter -> Blur -> Surface Blur can soften focus.
Remove unwanted blemishes.
This also works with smart Filters.
You can paint away the effect with a layer mask.
Test parameters on ParsonOnWhiteD90.
It’s like putting on 10 pounds of makeup!
Reopen properties
(Surface Blur) 28

29. Nip / Tuck – Healing Brush
ParsonUnshavedD90 -> Duplicate Layer
Healing Brush cleans up gray area under eye.
It combines Clone Stamp usage with using pixel colors from area being healed. 29

30. Nip / Tuck – Spot Healing Brush
Like the Healing Brush
… but it does NOT require a sample to be taken
A quick way to remove blemishes and wrinkles
It copies and merges pixels from around the retouched area. 30

31. Nip / Tuck – Patch Tool ParsonUnshavedD90 -> Duplicate Layer
Patch as Source:
Select an Ellipse on the forehead, then use Patch Tool to create a Third Eye.
Patch as Destination:
Select the eye, then use Patch Tool to create a Third Eye. 31

32. Red Eye ParsonUnshavedD90 Give him red eye!
Select his eyes (irises) with quick selection tool
Use Image -> Adjustments -> Replace Color
Click to add to selection (get the irises)
Select a replacement color (red)
First step in creating a zombie! 32

33. Red Eye repair Open Redeye.jpg
Use Red Eye Tool to fix the baby’s red Eye.
Use Pupil Size just over 50%, Darken just under 50%.