An adaptive image enhancement method and terminal

Abstract

This invention provides an adaptive image enhancement method and terminal. It determines a threshold number of pixels corresponding to brightness in the image to be enhanced based on a histogram, and maps this threshold to a preset slope. The slope of each segment in the histogram is calculated based on the threshold and the preset slope. The transformation relationship for image enhancement is then calculated based on the slope of each segment. The image brightness is then transformed according to this transformation relationship. This method does not simply scale a few grayscale intervals directly based on preset parameters. Instead, it first determines the slope of each segment based on the number of segments in the histogram, and then determines the transformation relationship for each segment based on the slope of each segment. This results in an image with synchronized brightness enhancement for each segment. The method exhibits strong adaptability and good enhancement effect, achieving the goal of enhancing image contrast and highlighting image details, thus providing an effective guarantee for subsequent image observation, processing, and recognition.

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