timo. paivarinta@helsinki. fi 050-523 5403 (59003) www. biocenter timo.paivarinta@helsinki.fi 050-523 5403 (59003) www.biocenter.helsinki.fi/bi/editor/DIP.ppt

Schedule 6.4. (Tue) 8.4. (Thu) 13.4. (Tue) 14.4. (Wed) Color systems, image formats Photoshop basics &tools Photoshop practice Office basics 20.4. (Tue) 21.4. (Wed) 26.4. (Mon) 28.4. (Wed) Corel Draw Graphic designing PDF basics Lecture

What’s it about?

Photoshop Corel Power Point Excel PDF

Color systems Image formats Resolutions

RGB Additional 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

CMYK Subtractive color system Cyan, Magenta, Yellow and Black (K) paint Press-houses levels are posted in percents 32-bit Rasterizing

CMYK

LAB Three-dimensioned Used mostly in measuring and analyzing colors A- and B-axis (2-d coordinates) about the color L-axis (perpendicular) about the tint.

Indexed color Used mostly in GIF-pictures for web Only 256 colors Transparency feature Not suitable for press-use.

grayscale 256 tints of black In tables, grayscale images etc.

Color circle

Image formats PSD JPG EPS TIFF GIF PNG

PSD Photoshop-format Layers Original data

JPG Effective compressing algorithm “Lossy” (loses information) Usage: www, MS-office

JPG 150 dpi/saved once quality 6 150 dpi/saved once quality 0 150 dpi/saved twice quality 0

TIFF Lossless compressing (LZW) Independent for platform (PC, Mac) Usage: press (Office)

EPS Encapsulated PostScript “Raw data” Can also be compressed (jpg) Usage: press

GIF Indexed color (256) Lossless Transparency Can be saved also interlaced Usage: www, MS-Office

GIF JPG/quality 12 GIF

PNG Lossless Indexed-color, grayscale, and true-color supported (up to 32-bit) transparency

Resolutions www: 72 dpi (exact size) Word & PP: 72-150 dpi Press: 300 dpi (exact size)