Table of ContentsTen Mysteries of Computer Artmaking Revealed PPT Slide Why These Ten Things? Overview PPT Slide PPT Slide What Am I Really Seeing When I “Zoom In”? Zooming In—Closer to What? Where’s the Pixel? Abstract Image Pixel Values Brought to Life The Power of the Pixel PPT Slide Alvy Says... Back to Zooming Aesthetic of the Pixel Art Why Do My Smooth, Seamless Screen Images Print Out Looking Grainy? Patterns of Black Areas Create Illusion of Grays Printer Spots Are Made of Dots Filling in the Dots More Dots Per Spot = More Grays Number of Grays vs. Resolution Gray Levels vs. Resolution I Do Not Like Green Eggs and Ham Halftone Clusters vs. Randomized Dot Placement Hmmm… I Think I Like Them PPT Slide Leon Harmon and Ken Knowlton, Mural, 1966 Ken Knowlton, Helen Keller in Simulated Braille, 1998 Why Does White Space in My Digital Painting Make My File Larger? Joan Truckenbrod’s Icon Perpetrators, 1997 Yikes! Equations What Exactly Does “Size” Mean in the Digital Painting and Photo-editing World? The Implications of File Size Art Art Convenience and Aesthetics A Size Case Study PPT Slide Richard Rosenblum, Black Ryder, 1994 What Resolution Should I Scan at and Why? Scanning at Too Low a Resolution Causes Aliasing Aliasing is Especially Problematic with Text and Other Fine Details Single-Colored Areas and Gradients Require Less Resolution The 2.5 X Rule PPT Slide What Do Image Filters Really Do? What is a Filter? A Simple Blurring Filter A Less Simple Blurring Filter A Sharpening Filter Sharpening Example Blurring Example Finding Edges Example Filter Shapes Filter Applet PPT Slide PPT Slide What is the Real Difference Between “Paint” and “Draw” Programs? Raster vs. Vector or Geometric Selection in Paint vs. Draw Programs Pros: Geometric Descriptions Can Be Easily Redefined Cons: …But Geometric Descriptions Can’t Be Smudged PPT Slide Issues Raised by Computer Control of Shape Descriptions Continue to Inspire Manfred Mohr How Can I Combine the Best of Paint and Draw Techniques? PPT Slide Why do Color Printouts Look so Different From Color on the Screen? Screen Colors vs. Printout Colors Additive and Subtractive Mixing Applets Screen Colors vs. Printer Colors RGB Gamut Grapher Applet Comparing Gamuts Why Does an Image That Looks Fine on One Platform Look Too Light or Too Dark on Another? Who’s Correct? Gamma Correction Problem Example The Solution? Conclusion PPT Slide Many Thanks To “With so much delightful and affordable hardware around I have to remind myself that in the British Museum, the Greek vase section, there are several outright masterpieces produced in two colors and with rudimentary technology, but with an artistry we can only dream about. It’s a quiet power. A few lines drawn, apparently casually, two and a half thousand years ago” — James Faure Walker |
Author: Anne Spalter
Email: ams@cs.brown.edu Home Page: http://www.cs.brown.edu |