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Published byClementine Wade Modified over 9 years ago
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Photoshop Basics: Extended Instructor: Vicki Weidler Assistant: Joaquin Obieta
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Overview 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
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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…..
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Uses of Photoshop Art (line drawings, charcoal, color original) Photographic Restoration WWW (GIFS, JPEGS, etc.) Montage Halftones, Duotones, Tritones, Quadtones Color Separations Posterizations Special Effects
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Vector Graphic
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Toggling Between Photoshop & ImageReady Toggling Button
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Slicing
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Image Maps
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Rollover Effects
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Animations
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Resolution Rules of Thumb Monitor (72-96 ppi) Print (300-600 dpi) Email (150 ppi)
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Web File Formats JPEG – Joint Photographic Experts Group GIF – Graphics Interchange Format PNG – Portable Network Graphics WBMP – Wireless Bitmap
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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)
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GIF Best for solid color images (buttons, logos) Uses 256 colors Browsers uses 216 colors Work in Indexed mode Good compression Interlaced
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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
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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
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WBMP Optimizes images for mobile devices Supports 1-bit color Black & white images Not supported in Photoshop 6 or earlier
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JPEG vs PNG Comparison of JPEG and PNG 68K PNG31K JPG
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GIF vs PNG Comparison of JPEG and PNG 10.8K PNG-8 with 64 colors9.5K GIF with 64 colors
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Print File Formats EPS – Encapsulated PostScript TIFF – Tagged-Image File Format Scitex CT – Scitex Continuous Tone
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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
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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
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Scitex CT Used for high-end processing on Scitex computers Supports CMYK, RGB, & Grayscale color modes Does not support alpha channels
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Color Gamut Lab color mode RGB color mode CMYK color mode
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Backlighting Problem
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Keystoning Effect
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Repairing Flaws and Scratches
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Red Eye Correction
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Summary 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
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Resources Questions & Answers Evaluations Thank You!!! Conclusion
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