(a)original low contrast image (b) image enhanced by contrast stretching 对比度拉伸的局限 对比度拉伸适合处理低动态(LDR)图像,这类图像的特点是对比度低,直方图的跨度较小,存在向两极拉伸的空间。对于高动态(HDR)图像,直方图跨度已经很大,对比度拉伸没有操作的空间,下图就是一个典型的例子。 直方图均衡化 His...
Image enhancement by modified contrast- stretching manipulation. Opt Laser Technol 38:196-201.C.C. Yang."Image enhancement by modified contrast-stretching manipulation,". Optics and Laser Technology . 2006Ching-Chung Yang. Image enhancement by modified contrast -stretching manipulation[J].Optics & ...
Here contrast stretching is used for obtaining deblurred image. In the proposed method local edge detection is applied on original as well as contrast stretched image. The set of edges obtained from both the images are fussed in order to get sharper edges. The original image and contrast ...
Contrast stretching evenly distributes a histogram’s pixel values across the full range of available pixel values. This technique is ideal for enhancing the contrast of an image with pixel values concentrated in one area of the intensity spectrum, such as the original low-contrast ...
Publications IRP India, Innovative ResearchYelne, ShubhamTomar, RupaliJadhao, AnkushBoriwar, RoshanP.I. India, et al.,"Crack Detection of Medical Bone Image Using Contrast Stretching Algorithm with the Help of Edge Detection," IJSET 2015.
Here we propose a new method for low contrast color images enhancement. This method uses two step processing, in first step global contrast stretching method is applied to improve the contrast of image and then in second step global and local contrast enhancement(GLCE) is performed because ...
Low contrast is one of the main characteristics of the low light level image, and contrast stretching is the important technical method to enhance the image. In this paper, the basic principle of realizing contrast stretching by...
【图像分析与计算机视觉-英文版】精品讲义-Lec3 Image Enhancement in the Spatial Domain I
However, few single image haze removal methods can simultaneously achieve clear visibility, sufficiently high contrast, and simplicity. In this paper, we propose an intuitive and effective method, called the depth-based contrast stretching transform (DCST), to simultaneously obtain clear visibility and ...
the proposed method adopts contrast stretching since it has a low computational complexity and preserves the global contrast of the original. However, the stretching often produces unpleasant images that do not contain clear details by limiting the output dynamic range. To solve this problem, we...