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CSCI-UA 4 (15)
Lecture

Web Design Notes - Photoshop pt 1.docx

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Department
Computer Science
Course
CSCI-UA 4
Professor
Adam Scher
Semester
Spring

Description
PHOTOSHOP – 1/28/14 03/13/2014 • Created by Thomas Knoll in 1987; acquired by Adobe in 1988. • Is the industry standard for graphic/image manipulation software; GIMP is growing in standard because  it is free. Takes many of its tool names and metaphors from old­fashioned darkroom photography (i.e. dodge,  burn, crop ) Mostly uses raster (or bitmap) graphics; images are made up ofpixels Vector Images Raster Images Made up of points and paths Made up of tiny dots (aka pixels) Form shapes are filled with color Each pixel stores color info Resolution based on math equations Resolution based on pixels per inch (ppi) Can be scaled infinitely without quality loss Information is lost when scaled up (resulting in  pixilation) File sizes are small File sizes are large Can easily convert to raster Converts to vector with difficulty Great for logos/illustrations Great for photography, web design File Types: EPS, WMF, AI, CDR, DXF, SVG, PLT File Types: BMP, PCX, TIFF, JPEG, GIF, PNG, PSD,  CPT PPI (pixels per inch) refers to an image’s resolution. STANDARD RESOLUTION ­ for anything on screen: 72 pixels/inch       in one inch of space, there will be 72 pixels ­ for paper: 300 pixels per inch       in one inch of space, there will 300 pixels Graphics with higher resolution have more pixel density hence better quality. NOTE:  Document/Canvas size specifies the  height and width of an image – not the  image’s resolution. WHY IS RESOLUTION HIGHER FOR PAPER? ­ our eyes are
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