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Digital Image Restoration and Retouching

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Digital Image Restoration and Retouching Powered By Docstoc
					Digital Photo Retouching and Restoration
What you need
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Photoshop CS3 on computer Tutorial images on hard disk Better to use a mouse than the trackball

No Photoshop experience required

First Off
Use WORKSPACE / DEFAULT

The Big Picture

Toolbox
Has mouseovers
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Letter shows keyboard shortcut Triangle indicates more tools

Are additional tools not visible
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No Hidden Tools

Hidden Tools

Hidden Tools Revealed !!

Toolbox (con’t)
Tools grouped by function

Tool Options Menu
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Specific setting for selected tool
 Has mouseovers

Palettes
Let’s clean up this a bit

Palettes In Control
Keep it simple

Setup
Settings
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Palettes In Palette Well
 Layers
 History  Channels

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EDIT / COLOR SETTINGS
 RGB : use Adobe RGB (1998)

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EDIT / PREFERENCES GENERAL
 Redo Key: Ctrl+Z  History states: 25

Foolin’ With Brushes
FILE / NEW
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Preset sizes : 4 x 6 inch Contents : White

Select Brush from Toolbox

Foolin’ With Brushes (con’t)
Important Point – you will use this a lot later on !!
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Foreground / Background Color Selector
 Set to pure Black and White

by little mini control  Swap Foreground and Background by curvy arrow gizmo

Foolin’ With Brushes (con’t)
Let’s do some tic-tac-toe LAYER / NEW / LAYER
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Layer for grid Layer for game Note – Photoshop extension is PSD
 Save in this format  Can save in JPG, GIF, etc. later

FILE / SAVE
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Layers are KEY !!
Always leave yourself a way out
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Don’t touch original photo (layer)
 Always Duplicate original photo (layer) and start work on

duplicate Layers

Work incrementally
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Name your Layers in a meaningful way
 Layer1, Layer2 is not real useful

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Can have dozens of Layers on a complex job

Build up effects and restoration as series of Layers Layers have Blending Options and Opacity

The Most Basic Tool - Crop
Can resize with handles Dark area shows what you will lose Hit RETURN to commit the Crop or use Check
Bail Commit Crop

Global Changes: Levels
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What is the main problem ? Is this a B&W or RGB image showing as B&W ? Examine histogram
 IMAGE / HISTOGRAM

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Add Levels Layer
 Work with Sliders

Soccer_1894.jpg

Two_Girls_1907.jpg

Global Changes: Multiply
Change Layer properties to build density
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Multiply

No_Density _St_Petersburg_1907.jpg

Overexposure
Severe
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Go forth and Multiply
 New Layer to Multiply again
 Reduce opacity of last Layer if necessary

Very_Bright _Girl.jpg

Underexposure
Bring out detail in shadows New layer
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Blending Mode = Screen Repeat if necessary by duplicating Layer
 Adjust opacity if necessary

Too_Dark.jpg

Can also use New Layer of Brightness / Contrast
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Not the best
 Same effect applied equally to

entire picture

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No smart math behind it

Semi-Global Changes: Curves
Curves
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“With great power comes great responsibility” Make change only to small tonal regions
 Ctl-click will place point on

curve  Can place 14 points on curve
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Woman_In_Dress.jpg

Can easily overdo it

Extreme Color Cast
Bad film processing Need to try and place a color
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Several Layer types have cool little droppers for placing colors ! What color to try and place ?

Extreme_Green.jpg

What can we do with Levels for color problems ?
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Hint – need to do it three times

Selection - Constrains The Tool or Effect
IMPORTANT POINT !! Selecting an area (marching ants) means that the Tool will only work in the selected area

Green Brush does not work outside of selection !

Selection – Many Selection Tools
Squares, circles, polyg ons, irregular shapes, colorbased, contrast-based
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Most Selection Tool modified by SHIFT, CTL and ALT keys Look at menu too !

Just One Selection Tool - Elliptical
Need to pay attention to all this stuff
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Feather – smoothes the transition
 0 pix

 5 pix
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Style
 Normal – can select ovals  Fixed Aspect Ratio – constrain to circle  Fixed Size – can specify exact size

Body Shop – Handle Reduction
Liquify, liquify and liquify some more Most useful tools are at the right Reduce handles
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Warp

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warp Pucker

Pucker Bloat

Handles.jpg

Revert button undos all changes Easily make sullen teenagers smile
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Reconstruct (local undo) Freeze Thaw

Bring up corners of mouth

Body Shop - Major Surgery
Unflattering angle Reduce backside
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pucker warp

DanceParty.jpg

Send In The Clones
Clone Tool
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Makes exact copy of selected area Make empty layer and work on this Especially useful for filling in large areas that have no detail Settings = Use All Layers, Aligned Sample frequently Click once
 Multiple clicks on same spot loses definition

Generally
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Cracks.jpg

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Use Selection to avoid Cloning out of picture SHIFT (and hold) will Clone in straight line

Heal Tool - Not Your Father’s Clone Tool
Examines texture, color, and luminosity of source. Merges texture from sample area into the color and luminosity of destination area. Only works on a single layer Spreads out effect 10-12 pixels
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therefore, use hard-edged brush

Avoid alot of resampling, as is typically done with Clone Stamp
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Sample once, paint often

High contrast areas difficult with Heal May need to change Blending Mode to Lighten or Darken

Heal Away
Duplicate background layer Reduce opacity to reduce effect of Healing on entire Layer
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BETTER – can control each Heal
 EDIT / FADE (Shift Ctl F)

Healing_Eyes.jpg

High contrast areas are trouble
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Clone instead

Healing_ High_Contrast.jpg

Patch Tool
Repair a selected area with pixels from another area or a pattern
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Matches the texture, luminosity, and color of the sampled pixels to the source pixels Patch source
 Select damaged area and move to good area

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Patch destination
 Select good area and move to damaged

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Patch from pattern
 Create or sample a pattern to use

Patching & Healing
Heal parts of the face Patch from source
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Select damaged section in the background, move to undamaged section Select good section of sweater and move down Can use Free Transform to distort area Can also use just plain old Move

Patch_Tool _Sweater.jpg

Patch from destination
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The DeBlemishinator
Can use
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Clone
 Can destroy texture

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Heal
 Blending Mode of Lighten (often)  Use Hard-Edged Brush

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Patch
 Quick and efficient (another way of

Overexpose.jpg

saying lazy)

Continue with eyes
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Low opacity white brush

Color Cast
Many ways to fix color casts
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Image / Adjustments / Variations

Color Balance Layer Levels Layer
Curves

 Useful for prints with less extreme color shifts

 Individual R, G and B  Find a white point, use dropper  Add Levels Layer, Blending = Multiply  Copy background so this layer is just above original background  Zoom 200% so can see speckling. Fix by:
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Adriana_1977.jpg

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Keep going !!

 Needs sharpening
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Filter / Noise / Despeckle Filter / Noise / Dust and Scratches

Duplicate layer with despeckled image Use Unsharp Mask to sharpen !!  Unsharp Mask is the best, use it often

Local Changes: Masking, Gradient
Masking
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Hide effects of global changes in certain regions
 Add Brightness/Contrast layer
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Concentrate on lightening houses, do not be concerned about sky

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Using the Mask
 Can add a Mask to Layers that don’t have

a Mask  Black blocks layer effects, white allows layer effect
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SkyLine_Wrong _Exposure.jpg

Paint Gradient  SHIFT restrains to 0, 45 and 90 degrees

Search and Rescue: Channel Mixer & Individual RGB Levels
Look at channels
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Often one channel has very poor info
 Blue has least info in this print

Two techniques
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1 ) Channel Mixer
 Add Channel Mixer Layer, Monochrome
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Increase R & G, Decrease B Add Levels layer, then save as Version1  What we are about to do will cause us to lose our beloved starting layer. Therefore, we save the image. Flatten Image (Layer / Flatten Image) Convert to Grayscale (Image / Mode / Grayscale) Dust and Scratches (Filter / Noise / Dust & Scratches), save as version 2

 Keep going !!
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Tintype_ AnyoneHome.jpg

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2) Levels with each R, G and B channel

Look at RGB Channels
Look at Channels for B&W prints scanned as RGB
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Often one Channel is better Image / Mode / Grayscale Filter / Noise / Dust and Scratches

Activate the best channel
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Select black area above woman
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Clone out woman Borrow nose from left girl
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Scribble.jpg

1 px lasso, Ctl J to put on own layer, move, transform Transform, flip horizontal

Borrow left side of mouth from right girl
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Fungus and Mold
Fix unimportant areas using
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Float and move
 Select upper sky, 2-5 px feather, avoid

straight lines  Copy to new layer, Blending = Lighten, move a few pixels  Try same thing on sidewalk (Blending = Lighten)
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Mold.jpg

Note that lose texture Maintain texture

 Use Dust & Scratches instead
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Hands of Time - Wrinkles
Dodge Tool
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5-15% exposure, Midtones New Layer
 Soft White, Fill with neutral color (50%) gray

Soft Light Neutral Layer
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Foreground color to white, Paintbrush with 515% opacity

Don’t rush either of the above, this is a very subtle process

Hands of Time – Wrinkles (con’t)
Patch & Heal
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Both can make image look obviously retouched
 Tip
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Neither Patch or Heal Tools have Opacity adjustment EDIT / FADE to reduce Opacity of last fix

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Patch useful for quickly fixing large areas quickly

Wrinkle_ Reduction.jpg

Glamor Skin Softening
Duplicate Layer Gaussian Blur (Filter / Blur / Gaussian Blur)
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3 – 6 pixel blur Reduce opacity
 Note – very different effect obtained by

Skin_Softening.jpg

doing Gaussian Blur at lower pixel setting and not reducing opacity

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Erase sections that should be sharper
 Eyes & eyebrows

 Lips ?

Body Shop: Low-Cost Rhinoplasty
Copy nose to layer
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10-20 px feather Ctl click allows working on single corner
Nosejob.jpg

Free Transform
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Clone out imperfections

The Eyes Have It
WINDOWS / NEW DOC
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100% Size – will be working at high Zoom, see effects here also

Zoom 300% on left eye Remove discolorization in whites
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Eyes.jpg

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Brush 10% opacity, Normal, sample 3x3 pix for good color (Ctl – click) Brush 70% opacity, Color, sample for good color Clone, 20% opacity, Lighten

Blood vessels
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The Eyes Have It (con’t)
Emphasis iris
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Burn, 10% opacity, Shadows, and trace iris rim Dodge to create half-moon opposite main catchlight Sponge, 20% flow, Saturate

More sparkle
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More color to iris
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Sorry, Ansel
Need a outdoor, Ansel Adams-type scene New Layer – Channel Mixer as shown

AnselAdamsHack.jpg

Time Machine and General Fixin’
Work on
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Hands Area below chin on left woman White line in center Local repair of a few wrinkles Two_Grandparents.jpg Color Woman on left too dark

Your choice !!

Overexposure
Moderate
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Determine best RGB channel New Channel Mixer Layer, Monochrome
 0% Red, 0% Blue, 100% Green

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Change blending to Luminosity

Overexpose.jpg

Backlighting
Camera meter fooled Select luminosity
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Channels, Control (Command) Click on Channels / RGB Ctl Alt ~ or Cmd Option ~
Backlighting _Underexposed.jpg

Select / Inverse (we are selecting non-luminosity or shadow detail) Copy to new layer Screen mode New Color Balance Layer, work on flesh tones

Wrong Temperature “Film”
Fluorescent lighting
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New Empty Layer Use Eyedropper to select midto highlight with cast Paint Bucket Tool
 Fill with offending color

 Change Blending Mode to Color
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Fluorescent_Lighting.jpg

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Invert color (Image / Adjustments / Invert) Reduce opacity

All Torn Up
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Large and upper-right piece on own layer Background eraser
 Erase pixels to transparency while

maintaining edges
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Settings control sharpness of edges and deleted TornUp.jpg pixels Samples at center (+) and deletes that color inside the circle Low tolerance limits erase to areas that are very similar to the sampled color. A high tolerance erases a broader range of colors. Limits = Find Edges Sampling = Contiguous Protect Foreground Color = Not checked

 Use big piece, hide all other layers, Erase top
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All Torn Up (con’t)
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Magic Eraser
 Erases everything it can find, at once, that is within tolerance
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Tolerance is as with Background Eraser If Contiguous is not checked, it can erase pixels in the middle of the print Tolerance = 50%, Contiguous, 100% Opacity

 Use upper right piece, other layers not visible
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Up to here has been saved as TornUp_02.psd Move upper piece. EDIT / TRANSFORM / ROTATE Add Layer Mask to upper piece.

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Paint with black, paint lower edge of upper piece, move
 Using a Layer Mask does not discard any information

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Up to here has been saved as TornUp_03.psd

All Torn Up (con’t)
Try to fix seam with Clone
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Use All Layers, Aligned = Checked This is not working right !! Ugh, this is not working either !!

OK, then try Healing Brush
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Why ?? Best to Flatten Image at this point Up to here saved as TornUp_04.psd Finish with Cloning and Healing

Books and Mags
Books
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Photoshop Restoration and Retouching
 Katrin Eismann  BUY THIS BOOK !!!

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Real Work Photoshop
 David Blatner and Bruce Fraser  Quite good

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Photoshop Book for Digital Photographers
 Scott Kelby (has a lot of books)  Some useful tips

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National Association of Photoshop Professionals
 http://www.photoshopuser.com/  Put out good magazine, Photoshop User

Links & Plug-ins
RetouchPro
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http://www.retouchpro.com/index.html Great set of images to practice on http://digitaldog.imagingrevue.com/ See tips section http://www.planetphotoshop.com/ A lot of small tutorials http://www.asf.com/ Excellent plugins (purchase): ROC, GEM and SHO

Digital Dog
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Planet Photoshop
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Applied Science Fiction
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Digital Image Restoration and Retouching
Restoration
 Levels layers

 Curves layers
 RGB Channels for B&W  Gradients  Scratches  RGB channel mixing  Color casts  Mold and fungus

 Torn photos

Digital Image Restoration and Retouching
Typical Problems
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Overexposure Underexposure Hotspots Fluorescent lighting color cast Eyes Wrinkles Softening skin Digital diet and body part “improvement”

Retouching
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Digital Visine
Desaturate with Brush
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Very quick, but not too elegant Sponge Tool, desaturate
RedEye.jpg

Digital Visine (con’t)
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Select and Desaturate Method
 Use Magic Wand

 Copy to New Layer
 Add Hue / Saturation Layer
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Important – check boxes applies effects to previous layer only Change Blending Mode to Multiply  Reduce Opacity

Local Changes : Gradient for Flash Fade
Flash fade very common
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New Levels layer Screen Blending Mode
 Will lighten entire photo

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Mask totally
 Mask should be all black

 Hide effects of Screen Blend

Flash_Fade.jpg

Mode

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Gradient
 White foreground

 Angle in from upper right corner


				
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