timo.paivarinta@helsinki.fi050-523 5403 (59003)

www.biocenter.helsinki.fi/bi/editor/DIP2011.zip

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

What isthe course about?

Photoshop

Corel

Power Point

Excel

PDF (Acrobat)

Color systems

Image formats

Resolutions

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

RGB

CMYKSubtractive color system

Cyan, Magenta, Yellow and Black (K) paint

Press-houses

levels are posted in percents

32-bit

Rasterizing

CMYK

Color circle

red

magentablue

cyan

green yellow

Indexed colorUsed mostly in GIF-pictures for web

Only 256 colors

Transparency feature

Not suitable for press-use.

Grayscale256 tints of black

In tables, grayscale images etc.

Image formatsPSD

JPG

EPS

TIFF

GIF

PNG

PSDPhotoshop-format

Layers

Original data

Vector data

Text editable

JPGEffective compressing

algorithm

“Lossy” (loses information)

Usage: www, MS-office (press)

JPG

150 dpi/saved once quality 6

150 dpi/saved once quality 0

150 dpi/saved twice quality 0

TIFFLossless compressing (LZW)

Independent for platform (PC, Mac)

Usage: press (Office)

EPSEncapsulated PostScript

“Raw data”

Can also be compressed (jpg)

Usage: press

Also vector data

GIFIndexed color (256)

Lossless

Transparency

Can be saved also interlaced

Usage: www, MS-Office

GIF

JPG/quality 12 GIF

PNGLossless

RGB-color with alpha channel supported

Transparency

Usage: screen

Resolutionswww: 72 dpi (exact

size)

Word & PP: 72-150 dpi

Press: 300 dpi (exact size)

Questions?