vision will often result in the inability to distinguish between colors a reduced capacity to use color contrast to extract information color confusion is usually asymmetric so that color confusion occurs along the red green or yellow blue color axis this means that by remapping colors in the field of view which are confusing to an observer to colors in the spectrum which offer better contrast it is possible for the user to recover the information content of the field of view the algorithm described below is intended to remap the color contained in the field of view to allow the user to extract maximum content information the color content of the processed field of view will not be true to the real world thus actual color information will not always be natural but the color contrast will be enhanced for the observer so that there will be little or no confusion due to reduced color contrast between the objects in the field of view this will allow the observer to identify a maximum number of details and maximize information extraction the algorithm is illustrated in fig5 if a color perception defect is identified in a patient then the image is modified by shifting some of the color in the defective color channel red green or blue yellow in the other color channel two parameters are typically required the first is to identify which colors in the image must be modified and the second is to determine.