computer science 194-23 the art and science of digital...
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Computer Science 194-23The Art and Science of Digital Photography
Lecture 2: Software Tools & LightFebruary 4, 2013
[email protected]@[email protected]
Staff email: [email protected]
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Cameras Location of the Focal Plane
Image from http://www.dpreview.com/reviews/canoneos40d/page7.asp
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Cameras Exposing SLRs
Image from Digital Photography Review, http://www.dpreview.com
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Bits and Bytes Colors
JPEG
Red Green Blue
8-bit 8-bit 8-bit
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Bits and Bytes Colors
16-bit TIFF
Red Green Blue
16-bit 16-bit 16-bit
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Bits & Bytes Compression
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Flag images from http://www.worldatlas.com/, copyright © Graphic Maps.
Bits & Bytes Compression
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Images from Dennis P. Curtin, et al., Information Technology: The Breaking Wave, copyright ©The McGraw-Hill Companies, Inc.
Bits & Bytes Lossless vs Lossy Compression
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Photo by Dan Armendariz, 2007
Bits & Bytes File Types
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Name Compression Color AlphaJPG Lossy 24-bit NoGIF Lossless 8-bit* YesPNG Lossless 24-bit Yes**PSD Unknown (lossless) 48-bit YesTIFF Lossless 48-bit No
* GIF contains an 8-bit palette (or subset of colors) from a 24-bit set of colors** Some older software does not properly display transparency in PNG files
Software Tools Available Tools
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Software Tools Photo Organization
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Software Tools Photo Organization
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Software Tools Photo Organization
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Photo Organization Folders, Projects
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Photo Organization Ratings, “Stacks”
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Photo Organization Keywords
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Photo Organization Metadata
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Photo Organization My way or the highway!
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Photo Organization Backing up
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Software Tools Interacting with a camera
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Photo sequence by Dan Armendariz, 2004Around f/5.6, 1/20s, ISO 400
Software Tools RAW Processing
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Software Tools Resizing and Cropping
Photo by Dan Armendariz, 2007
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Software Tools Photoshop!
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Light Properties of Waves & Particles
Image from http://en.wikipedia.org/wiki/Electromagnetic_radiation
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The Eye In a nutshell
Image from http://en.wikipedia.org/wiki/Eye
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The Eye Fovea
Image from http://en.wikipedia.org/wiki/Fovea
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The Eye Rods & Cones
Rods Cones
Night vision Day visionMore sensitive to light Less sensitive to light
Not in fovea Concentrated in fovea
22 times as many rods than cones in retina22 times as many rods than cones in retinaMonochromatic stimulus Trichromatic (color) stimulus
Preference to detect motion Preference to detect detail
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The Eye Rods & Cones
Image from http://en.wikipedia.org/wiki/Trichromacy
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Cameras Similarity to the Eye
Images from http://en.wikipedia.org/wiki/Eye and http://en.wikipedia.org/wiki/Single-lens_reflex_camera
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Computer Science 194-23The Art and Science of Digital Photography
Lecture 2: Software Tools & LightFebruary 4, 2013
[email protected]@[email protected]
Staff email: [email protected]
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