Real-time high-dynamic imaging method and imaging system

Abstract

The invention provides a real-time high-dynamic imaging method and imaging system, and solves the problems that an existing dynamic range extension method cannot meet the application occasions with high real-time requirements and small time delay, calculation results have large errors, and high-dynamic images are blurred. The method comprises the following steps: 1, enabling an image detector to output high-gain and low-gain image data; 2, performing Gray code-binary code conversion on the high-gain image data and the low-gain image data; 3, obtaining weights of the high-gain image and the low-gain image; 4, fusing the high dynamic range images; 5, performing high dynamic range image mapping; 6, storing the mapped high dynamic range image data in a cache unit; 7, reading cache unit data, and packaging and encoding the mapped high dynamic range image data; and 8, sending the packaged and encoded image data to an output unit for outputting.

Description

technical field [0001] The invention belongs to the field of real-time image processing, and in particular relates to a real-time high dynamic imaging method and imaging system, in particular to a high dynamic image imaging system and imaging method based on single-exposure high-gain and low-gain image fusion. Background technique [0002] The dynamic range of a real scene refers to the illuminance ratio of the brightest part to the darkest part in the scene, which is usually expressed in logarithms, and the unit is dB. The illuminance range in nature covers a very wide range, the maximum dynamic range is as high as 160dB, and the dynamic range that the human eye can perceive can reach 100dB. [0003] The dynamic range of the image is an important parameter to characterize the imaging quality of the imaging system. At present, most digital imaging systems are still 8-bit quantized display, and the output image can only record a limited range of grayscale and color levels, an...

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Problems solved by technology

[0005] The purpose of the present invention is to solve the problems that the existing dynamic range extension method cannot satisfy the application occasions with high real-time requirements and small delay, and there are large errors in calculation results and blurred high-dynamic images. A dynamic imaging method and an imaging system. The method and system combine the image data of the high and low gain output channels on the basis of the existing image detector with high and low gain dual channel simultaneous output, and combine the high and low gain output channels to convert the high and low gain Low-gain images are weighted and fused according to the calculated weight ratio to obtain high dynamic range images

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