Nonlinear Transformations Applied to Image Processing on the RGB LED Display

The paper considers non-linear transformation applied in contrast adjustment of LED display images. It tackles the challenges of active image adjustments and processing, taking into account the non-linearity of the display element - a LED screen with nonlinear feature. It addresses the contrast adjustment problem, which involves a series of recursive nonlinear transformations. Considering a setting interval between 0 and 1 these will lead to a proportional and equally distant narrowing of the possible values interval for the image signal. For the special case investigated in this paper, the linear command applied to a LED display will produce nonlinear effects in the response obtained over the light intensity. This entails either a digital conversion (a map of corrections for the non-linear values, which will be taken into consideration when addressing the image pixels), or a nonlinear signal command.