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Stanford course: Digital Photography
  • You can find references to many good books and many very useful applets.


    Variables that Affect Exposure
    exposure applet screenshot

    Explores the tradeoffs between aperture, exposure time and ISO.

    Lens Applets

    Thin Lens
    thin lens applet screenshot

    Uses Gauss's ray tracing construction to show how thin lenses perform a 3D perspective transformation of object space into image space.

    The Gaussian Lens-Maker's Formula
    gaussian applet screenshot

    The relationship between object distance, image distance, and focal length, and the distinction between focusing and zooming.

    Depth of Field
    depth of field applet screenshot

    How do focal length, subject distance, F-number, and size of the circle of confusion affect depth of field?

    Telephoto Zoom Lens
    zoom applet screenshot

    The operation of zoom lenses, telephoto zoom lenses, and optically-compensated telephoto zoom lens.


    Spatial convolution
    convolution applet screenshot

    Interactively demonstrates 1D continuous convolution and 2D discrete convolution. Don't miss the "custom" buttons!


    Autofocus: Phase Detection
    autofocus: PD applet screenshot

    Explore how some cameras (mostly SLRs) use phase detection to autofocus a picture.

    Autofocus: Contrast Detection
    autofocus: CD applet screenshot

    Explore how other cameras (mostly point-and-shoots) use contrast detection to autofocus an image.


    Introduction to Color Theory
    locus applet screenshot

    Explores the trichromatic theory of color vision and
    considers its implications for human perception, color photography, and computer
    display of color images.

    Color Matching
    color matching applet screenshot

    Reenact Maxwell's color matching experiment to see how closely you can match the trichromatic matching functions for the given primaries.

    Chromaticity Diagrams
    chromaticity diagrams applet screenshot

    Explores chromaticity diagrams and the meaning of the 2D gamut of perceivable colors.

    Gamut Mapping
    gamut mapping applet screenshot

    Interactively shows the results of gamut mapping (both the primaries and the rendering intents) on the colors displayed in an image.

    Color Mixing
    color mixing applet screenshot

    Explores additive and subtractive color mixing.


    Gamma Correction
    gamma applet screenshot

    Unwrapping some of the tangled world of gamma correction.


    Cylindrical Panoramas
    projection applet screenshot

    Demonstrates how images are projected from a plane to a cylinder to form a panorama.