Based on the brightness correction algorithm

a pre-processor scheme is proposed. The processor can realize the function of point by point correction for image data of arbitrary resolution and arbitrary transmission format. The pre-processor is completely independent of the display control system. Firstly

the model of point by point luminance correction algorithm is introduced. On the basis of the model

the model of point by point correction algorithm which is used to the preprocessor is derived. Then the design structure of the current hardware condition is analyzed based on this model

which mainly to SDRAM SDR frequency as the bottleneck analysis

According to the aggregation characteristics of the correction parameters

the method and numerical reconstruction of the range of compression correction parameters are adopted. The frequency of SDR SDRAM was indirectly improved. The data of any resolution and arbitrary transmission format can be handled by the point by point correction technology which is in the pre-processor. Finally

The application effect of pre method and post method is analyzed. It is concluded that the effect of pre method is worse than that of the post method

especially on the performance of low gray level uniformity. The flexibility and versatility of the prefix method is superior to the post method.