Background

The anaglyph is another form of stereogram and the technique generally used in older 3D movies. This method of creating anaglyphs is illustrated in ISLE 7.9. If you don't have glasses or just wish to see these the depth of these images in another way you can use this version of the activity.

This activity takes advantage of the motion depth cue, motion parallax. One eye's image is presented and then alternated with the image in the other eye. Most objects are in a slightly different position and the degree of difference is related to depth. That is the result of the binocular disparity. The same way that position changes between the two eyes is also how we extract depth from motion parallax. Instead of the differences of position being between two eyes, it is a difference in motion, but the basic geometry is the same.

See the Instructions tab to know how to use this activity.

Instructions

Full Screen Mode

To see the illustration in full screen, which is recommended, press the Full Screen button, which appears at the top of the page.

Illustration Tab

The basis way to use this activity is to click on or touch the image. The displayed image will change to the image from the other eye creating apparent motion.

Settings

Below is a list of the ways that you can alter the illustration. The settings include the following:

Select Image to View: Choose from a list of images to try different images.
Open Your Own Stereo Image (?): if you have your own stereo image pairs, you can upload them here to use this activity to jitter the images.

Reset

Pressing this button restores the settings to their default values, which mainly goes to the first image selected.

Try these settings to use motion parallax to simulate a stereogram
Select Image to View Fig 7.21 Stereoscope Stereo Eye Wear Fig 7.14b Statue in Montreal Fig 7.23a Venetian Masks Fig 7.23b Students Fig 15.1 Flowers Cave Textures Christmas Tree CSU Fullerton Fire in a grate Flowers Statue Venetian Masks 02 Statue in Montreal Another Statue in Montreal Rocky Coastline River Rocky Surface Rocky Coastline 02 Rocky Surface 02 Rocky Surface 03 Outdoor Scene Rocky Surface 04 Lake Woods Hanover College Point Hanover College Quad Quebec City Cat Figures
Open Your Own Stereo Image(?):

So that the object that you are examining falls of the fovea of both eyes, the eyes must rotate properly so that both eyes are aimed at the object. This action is the of vergence.