Network Security Internet Technology Development Database Servers Mobile Phone Android Software Apple Software Computer Software News IT Information

In addition to Weibo, there is also WeChat

Please pay attention

WeChat public account

Shulou

How to solve the problem of Luminance imbalance in Color Pictures by Python+OpenCV

2025-04-09 Update From: SLTechnology News&Howtos shulou NAV: SLTechnology News&Howtos > Development >

Share

Shulou(Shulou.com)06/02 Report--

This article mainly introduces "how to solve the problem of brightness imbalance in color map by Python+OpenCV". In daily operation, I believe many people have doubts about how to solve the problem of brightness imbalance in color map by Python+OpenCV. The editor consulted all kinds of data and sorted out simple and easy-to-use operation methods. I hope it will be helpful for you to answer the doubt that "how to solve the problem of brightness imbalance in color map by Python+OpenCV". Next, please follow the editor to study!

Working with contrast stretching

That is, rescaling the image to a specified range.

# contrast stretch p1, p2 = np.percentile (img, (0,70)) # numpy calculates any percentile of a multidimensional array rescale_img = np.uint8 ((np.clip (img, p1, p2)-p1) / (p2-p1) * 255)

Among them, the percentile function of numpy can calculate any percentile of a multi-dimensional array. Because the whole picture is dark, I scale 0 ~ 70% of the gray value of the original image to 0 ~ 255.

Log transform

Use the following formula for mapping:

# logarithmic transformation log_img = np.zeros_like (img) scale, gain = 255, 1.5for i in range (3): log_img [:,:, I] = np.log (img [:,:, I] / scale + 1) * scale * gainGamma correction

Use the following formula for mapping:

Welcome to subscribe "Shulou Technology Information " to get latest news, interesting things and hot topics in the IT industry, and controls the hottest and latest Internet news, technology news and IT industry trends.

Views: 0

*The comments in the above article only represent the author's personal views and do not represent the views and positions of this website. If you have more insights, please feel free to contribute and share.

Share To

Development

Wechat

© 2024 shulou.com SLNews company. All rights reserved.

12
Report