Transcript Photoshop: Creative Uses - Pennsylvania State University

Photoshop Basics: Extended
Instructor: Christine Vucinich
Assistant: Denise Wagner
Overview
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Explore the Photoshop environment
Work with images
Work with selections
Create images
Work with bitmap and vector graphics
Work with colors and color settings
Manipulate layers
Modify photographs
What is Photoshop?
Photo retouching, image editing,
and color painting program;
graphic design tool
• Create high-quality digital images
• Tools & special effects capabilities
• Manipulate scanned images, slides, &
original artwork
• Isolate parts of an image for
experimentation & individual editing
• And lots more…..
Uses of Photoshop
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Art (line drawings, charcoal, color original)
Photographic
Restoration
WWW (GIFS, JPEGS, etc.)
Montage
Halftones, Duotones, Tritones, Quadtones
Color Separations
Posterizations
Special Effects
Vector Graphic
Toggling Between
Photoshop & ImageReady
Toggling Button
Slicing
Image Maps
Rollover Effects
Animations
Resolution Rules of Thumb
• Monitor (72-96 ppi)
• Print (300-600 dpi)
• Email (150 ppi)
Web File Formats
• JPEG – Joint Photographic Experts
Group
• GIF – Graphics Interchange Format
• PNG – Portable Network Graphics
• WBMP – Wireless Bitmap
JPEG
• Best for photos or continuous tone,
full-color images
• Uses 16 million colors
• Browsers use reasonable
approximations
• Work in RGB mode
• Uses lossy compression
• Saving (Standard, Optimized,
Progressive)
GIF
• Best for solid color images
(buttons, logos)
• Uses 256 colors
• Browsers uses 216 colors
• Work in Indexed mode
• Good compression
• Interlaced
PNG (8-bit)
• Best for line art (logos)
• Compresses solid areas of color well
and maintains sharp detail
• Generally, has better compression
than GIF (10-30% smaller)
• If considering saving as GIF, also
consider saving as PNG (8-bit)
• Not supported by older browsers
PNG (24-bit)
• Best for continuous-tone images
• Compresses well, but can be
larger than JPEGs
• If considering saving as JPEG,
could also consider PNG (24-bit)
• Not supported by older
browsers
WBMP
• Optimizes images for mobile
devices
• Supports 1-bit color
• Black & white images
• Not supported in Photoshop 6 or
earlier
JPEG vs PNG
Comparison
of JPEG and
PNG
68K PNG
31K JPG
GIF vs PNG
Comparison
of JPEG and
PNG
10.8K PNG-8 with 64 colors
9.5K GIF with 64 colors
Print File Formats
• EPS – Encapsulated PostScript
• TIFF – Tagged-Image File Format
• Scitex CT – Scitex Continuous Tone
EPS
• Used for printing on imagesetters
• Supports Lab, CMYK, RGB, Indexed,
Duotone, Grayscale, & Bitmap color
modes
• Supports both bitmap & vector
graphics
• Does not support alpha channels
• Examples: newspapers, laser
printers
TIFF
• Preferred format for desktop publishing
• Examples: PageMaker, Quark
• Supports CMYK, RGB, Lab, Indexed, &
Grayscale color modes (including alpha
channels)
• Supports Bitmap color mode (without
alpha channels)
• TIFF format will only show flattened image
(1 layer) in other applications
• Can save annotations, transparency, &
multiresolution data in TIFF format
Scitex CT
• Used for high-end processing on
Scitex computers
• Supports CMYK, RGB, &
Grayscale color modes
• Does not support alpha
channels
Color Gamut
Lab color mode
RGB color mode
CMYK color mode
Backlighting Problem
Keystoning Effect
Repairing Flaws and
Scratches
Red Eye Correction
Summary
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Explore the Photoshop environment
Work with images
Work with selections
Create images
Work with bitmap and vector graphics
Work with colors and color settings
Manipulate layers
Modify photographs
Conclusion
• Resources
• Questions & Answers
• Evaluations
• Thank You!!!