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CN107146207A 一种参数优化的低照度图像增强方法 失效 - 权利终止 转让

一种参数优化的低照度图像增强方法
Abstract:
本发明提供一种参数优化的低照度图像增强方法，所述图像增强方法包括：a)获取低照度图像R(x)，建立所述低照度图像R(x)与增强图像E(x)的增强函数E(x)‑(225‑A)＝(R(x)‑(225‑A))/t(x)；b)归一化低照度图像R(x)的灰度图像g(x)，得到低照度图像R(x)的归一化灰度图像gray；c)构造低照度图像R(x)到增强图像E(x)的放大倍数t(x)与低照度图像R(x)的归一化灰度图像gray的线性相关函数t(x)＝f(w,g(x))；d)选取天空亮度参数A＝255，线性相关函数t(x)＝f(w,gray)，得到优化增强函数E(x)＝R(x)/t(x)＝R(x)/f(w,gray)对低照度图像增强。
Abstract(English):

The invention provides a parameter optimization-based low-illuminance image enhancement method. The image enhancement method includes the following steps that: a) a low-illuminance image R(x) is obtained, the enhancement function E (x)-(225-(A)=(R(x)-(225-A))/t(x) of the low-illuminance image R (x) and an enhancement image E(x) is built; b) the gray image g(x) of the low-illuminance image R(x) is normalized, so that the normalized gray image gray of the low-illuminance image R(x) is obtained; c) the linear correlation function t(x)=f(W,g(x)) of magnification times t for converting the low-illuminance image R(x) to the enhancement image E(x) and the normalized gray image gray of the low-illuminance image R(x) is constructed; and d) a sky brightness parameter A=255 and the linear correlation function t(x)=f(W, gray) are selected, so that an optimization enhancement function E(x)=R(x)/t(x)=R(x)/f(W, gray) is obtained so as to perform enhancement on the low-illuminance image.

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