Chromatic Vision Simulator

Old Version

User's Guide

Manual1 open image

Manual2 open image

Displays simulated images on the screen from built-in cameras or image files in real-time.

(1) Status

Displays the color vision type of simulating.

(2) Magnification of digital zoom (- 500%)

Specify the magnification of digital zoom. You can zoom in and out simulating images by pinching screen with two fingers.

(3) Color Vision Type（C, P, D, T）

Choose color vision types to simulate. Normal Color Vision (C) and three major types of color vision deficiency (dichromat): Protanope (P), Deuteranope (D) and Tritanope (T) are supported. "C" gives you unmodified original video stream. 1-4 color vision types can be simulated in parallel. When one of the switch is long-pressed (1.2 sec), all other types are deselected and it is change to single type simulation.

(4) Simulation Intensity Button

Push to show the "Simulation Intensity Slider". The "Simulation Intensity" is a value which specifies the simple linear interpolation's ratio(%) when the dichromat(the strongest color vision deficiency) simulation is 100% and normal vision (original) is 0%. As described in "Cautions" section in "About" page, this is not intended to simulate the vision of anomalous trichromat(weak color vision deficiency).

(5) Simulation Intensity Slider

Specifies "Simulation Intensity"(described above). The top means 100% (default) and the bottom means 0%.

(6) Switch Camera/File Button

Shows the buttons (8, 9, 10) which choose the image source device.

(7) Save image button

Push to save simulation images to the "Photo Album. Geotag (location information) can be added in the saved image. It's enabled when "Settings > Privacy > Location Services" is ON and "CVSimulator" is ON on iOS, and when used in models equipped with GPS and location information is permitted on Android devices.

(8) Switch to Rear Camera Button

Switch the image source to the rear camera.

(9) Switch to Front Camera Button

Switch the image source to the front camera. A mirrored image is displayed on the screen when the front camera is used.

(10) Switch to Image File Button

This button is used when simulate the image in the "Photo Album"

(1)-(10) disappear in 10 seconds without touch. You can touch the screen to display them again.

Troubleshooting

Can not save the screen image even push the "Image Save Button" ?
You should be able to give permission via Settings > Privacy > Photos > "Chromatic Vision Simulator" 'on'.

Notes

This application software was developed by Kazunori Asada (Ph.D. of Medical Science and Ph.D. of Media design), and is released free. (patent pending)
The simulation algorithm which is used in this application is based on the proposed method of the following treatise, and reproduces the color in which a dichromat, which is the biggest grade of color vision deficiency in each type of color vision, is probably seen by high-speed operation artificially.
H. Brettel, F.Viénot, and J. D. Mollon: Computerized simulation of color appearance for dichromats, Journal of the Optical Society of America A, vol.14, no.10, pp.2647-2655 (Oct. 1997).
The simulation image displayed in this application is made by prediction under how dichromats see the color under a specific technique and conditions, and is not necessarily exact. Moreover, each individual has different color vision.
The color value and name displayed in this application is computed by calculation based on several standards under the specific precondition, and is not necessarily exact. Moreover, there are variations in the characteristics of the screen and camera on the device to be used.
Although this application has the ability to simulate with the "Simulation Intensity", it is just a function which makes a simple linear interpolation image between the dichromat(the strongest color vision deficiency) simulation and normal vision (original), and it is not intended to simulate the vision of anomalous trichromat(weak color vision deficiency).
"Color Vision Deficiency", "Protanope / Protanomal / Protan", "Deuteranope / Deuteranomal / Deutan" and "Tritanope / Tritanomal / Tritan" used in this manual are scientific terms.
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