The anaglyph is another form of stereogram and the technique generally used in older 3D movies. Like traditional Wheatstone stereograms, anaglyphs are made by taking two photographs of a scene from cameras separated by about 6 cm. However, one photograph is then printed in a shade of one color, such as blue, whereas the other photograph is printed in a shade of another color, such as red. The two photographs are then integrated into a common image. The common image looks a bit fuzzy under normal viewing. However, when viewed through special color-coded anaglyph glasses, each of the two images goes to one eye, allowing for the stereoscopic image to emerge. The current convention is for the red lens to cover the left eye, and the cyan lens to cover the right eye.
In this activity, you can examine several different anaglyphs, including all of the anaglyph figures from the text, though a bit larger. See the Instructions tab to know how to use this activity.
To see the illustration in full screen, which is recommended, press the Full Screen button, which appears at the top of the page.
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.
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 anaglyph images, you can upload them here.
Pressing this button restores the settings to their default values, which mainly goes to the first image selected.