When a video signal is sent to a display device, the intensity of the picture should - ideally - match the value of the signal. So, if we send a signal at 50% of its maximum value then the display should be 50% of its maximum intensity.

A process that compensates for the deviation in connection with the brightness of the display and the input voltage. The parameter for the gamma correction is called gamma value. In real life, this does not happen. The intensity of a CRT display is not linear to the level of the signal sent to it but is described by a power function where the exponent is the gamma of the display. Video camera and video transfer operators add the inverse of the gamma function to a signal to compensate for this. In video, the gamma is 2.2 so output=input^2.2

Gamma correction is a function of a projector that corrects errors between the true value of each pixel coming from an inputted signal, and the actual intensity that the projector ends up displaying in that pixel. In simple terms, display technologies project incoming color values incorrectly and need to be adjusted. Gamma correction allows the user to adjust the values of the inputted signal to give you a more detailed picture. Gamma correction changes the relationship of red to green to blue, and hence can dramatically affect the overall image.

Gamma correction allows you to adjust the intensity of the inputted signal for a more detailed picture. Gamma correction changes the relationship of red, to green, to blue and hence, can dramatically effect the overall image. Here's an example: the first image is an image that has not been gamma corrected. The second image has been properly gamma corrected.

If a projector provides a good color balance and avoids the tendency to achieve brightness by pumping more green into the image, then color temperature and gamma correction are about the only things you might adjust to your preference. To this end, Sharp did an excellent job.