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timo.paivarinta@helsinki.fi050-523 5403 (59003)
www.biocenter.helsinki.fi/bi/editor/DIP2011.zip
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Schedule4.3. (Fri) 7.3. (Mon) 8.3. (Tue) 11.3. (Fri)
Color systems, image formats
Photoshop basics &tools
Photoshop practice
Photoshop practice
14.3. (Mon) 15.3. (Tue) 18.3. (Fri) 21.3. (Mon)
Office as drawing tool
Corel Draw PDF basics Questions,problems
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What isthe course about?
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Photoshop
Corel
Power Point
Excel
PDF (Acrobat)
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Color systems
Image formats
Resolutions
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RGBAdditional color system
red, green and blue light
256 levels of every color (8-bit.)
more than 16 million colors (2563, 24-bit)
used in web, in screens and for example MS:s
Office-programs
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CMYKSubtractive color system
Cyan, Magenta, Yellow and Black (K) paint
Press-houses
levels are posted in percents
32-bit
Rasterizing
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Color circle
red
magentablue
cyan
green yellow
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Indexed colorUsed mostly in GIF-pictures for web
Only 256 colors
Transparency feature
Not suitable for press-use.
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Grayscale256 tints of black
In tables, grayscale images etc.
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Image formatsPSD
JPG
EPS
TIFF
GIF
PNG
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PSDPhotoshop-format
Layers
Original data
Vector data
Text editable
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JPGEffective compressing
algorithm
“Lossy” (loses information)
Usage: www, MS-office (press)
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JPG
150 dpi/saved once quality 6
150 dpi/saved once quality 0
150 dpi/saved twice quality 0
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TIFFLossless compressing (LZW)
Independent for platform (PC, Mac)
Usage: press (Office)
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EPSEncapsulated PostScript
“Raw data”
Can also be compressed (jpg)
Usage: press
Also vector data
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GIFIndexed color (256)
Lossless
Transparency
Can be saved also interlaced
Usage: www, MS-Office
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GIF
JPG/quality 12 GIF
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PNGLossless
RGB-color with alpha channel supported
Transparency
Usage: screen
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Resolutionswww: 72 dpi (exact
size)
Word & PP: 72-150 dpi
Press: 300 dpi (exact size)