High dynamic range image fusion method used for overcoming influence of dynamic problem

Abstract

The invention discloses a high dynamic range image fusion method used for overcoming influence of a dynamic problem for overcoming a problem of high dynamic range image fusion which is influenced by dynamism of a shot scene and shake of an imaging system. A method for calibrating a camera response function based on a brightness mapping function is adopted to overcome the influence of the dynamic problem on calibration of the camera response function, and then a total least square method is combined to introduce a correction matrix to carry out combined compensation on an error, so that the camera response function of the imaging system can be obtained without high-precision image registration; through analyzing a feature selection weighting function of a multi-exposure image sequence, the calibrated camera response function is combined to construct a high dynamic range image weight fusion function, and the input multi-exposure image sequence is utilized to obtain a high dynamic range image fusion effect. The method can overcome difficulties which are brought to calibration of the camera response function by the dynamic problem, so that the adaptability of a multi-exposure high dynamic range fusion technology is improved.

Description

technical field [0001] The invention belongs to the technical field of image processing, and relates to a high dynamic range image fusion method suitable for solving the impact of shooting scene dynamics and shaking of an imaging system. Background technique [0002] In real environments and battlefield environments, scenes with a large dynamic range often appear, that is, brighter and darker information appear simultaneously in the same field of view. If the dynamic range of the shooting scene exceeds the dynamic range of the imaging device, it will cause over-saturation or under-saturation of the collected image, thereby affecting the collection and recognition of target information. For example, due to the bright tail flame of the launched missile, the collected image will be saturated, so that the projectile body cannot be seen clearly, which will affect the analysis of the target. Therefore, in order to facilitate target observation, higher requirements are put forward...

AI Technical Summary

Problems solved by technology

The algorithm requires accurate registration of multi-exposure image sequences of static scenes as input to calibrate the camera response function. When the shooting scene is affected by dynamic problems or the camera shakes, it will bring great difficulties to image registration, so that it cannot be performed. Camera response function calibration, that is, the algorithm cannot overcome the impact of dynamic problems; moreover, the high dynamic range image fusion obtained by using this algorithm has color cast, and it is necessary to combine the corresponding color correction algorithm to white balance the output result

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