This MATLAB function enhances the contrast of the grayscale image I by transforming the values using contrast-limited adaptive histogram equalization (CLAHE) [1].
Adaptive histogram equalization (AHE) is an image pre-processing technique used to improve contrast in images. It computes several histograms, each corresponding to a distinct section of the image, and uses them to redistribute the luminance values of the image. It is therefore suitable for improvi...
References: Karel Zuiderveld, "Contrast Limited Adaptive Histogram Equalization", Graphics Gems IV, p. 474-485, code: p. 479-484MATLAB内置了adapthisteq函数,可以实现CLAHE算法。我们以Human Knee为例,看看CLAHE效果:不仅目标被点亮了,而且低噪也被抑制了!2.2 算法格式和细节...
The experimental analysis was performed using Matlab 庐; . Results show that for MR images the exponential histogram specification with a clip-limit of 0.01 is found to be optimum. At optimum clip-limit, the mean of SSIM exhibited by the Rayleigh, uniform and exponential histogram specification ...
在CLAHE提出以前,学者还提出了自适应直方图均衡Adaptive Histogram Equalization。自适应直方图均衡化(AHE)用来提升图像的对比度的一种计算机图像处理技术。和普通的直方图均衡算法不同,AHE算法通过计算图像的局部直方图,然后重新分布亮度来来改变图像对比度。因此,该算法更适合于改进图像的局部对比度以及获得更多的图像细节。
《A new adaptive contrast enhancement algorithm for infrared images based on double plateaus histogram equalization》提出自适应双平台直方图均衡算法,一种基于双平台直方图均衡的红外图像自适应对比度增强算法。 传统的双层斜展直方图均衡化算法使用恒定阈值,不能在不同的场景中改变阈值,使其实际使用是有限的。在提出...
• Preprocessing the image data, which includes things like image resizing, color space conversion, contrast improvement, noise reduction, and hair removal, is essentially what the first phase entails by using Adaptive Histogram Equalization and Adaptive Median Filter. • In this work, a threshold...
The adaptive histogram equalization defogging algorithm [3, 4] is an improvement on the basic histogram algorithm, which can indistinguishably improve the image contrast, suppress the slope of the transformation function to some extent, and avoid the phenomenon that rising too fast resulting weak ...
• Preprocessing the image data, which includes things like image resizing, color space conversion, contrast improvement, noise reduction, and hair removal, is essentially what the first phase entails by using Adaptive Histogram Equalization and Adaptive Median Filter. • In this work, a threshold...
Y=T(X(i,j))|∀X(i,j)∈X 该算法支持图像、视频数据流处理,图像数据流处理pipeline如下图: 视频数据流处理pipeline如下图: 仿真结果 仿真代码matlab Demo可以参考 ,自己跑跑看结果 代码链接: https://github.com/AomanHao/ISP_Low_Light_Image_Enhancement...