how to reduce the brightness of an image?

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Sivakumaran Chandrasekaran
回答： DGM 2022-4-28
In MATLAB there are direct commands to enhance the brightness. I need to reduce it. How to achieve it.

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回答（3 个）

Rene
Rene 2012-9-11
image = image./3;
imshow(image,[0 255])
yields a threefold reduction
Image Analyst
Image Analyst 2012-9-11
There are several ways, such as you can divide the image by a factor, you can subtract a number from it, or you can convert from RGB color space to HSV colorspace, reduce the intensity of the v channel (for example by subtracting or dividing) and then convert back to RGB color space.
DGM
DGM 2022-4-28
There are many different ways, using both simplistic direct methods and purpose-built tools. The answers in this related question cover several of the ways and should apply directly to this question as well.
How to increase the brightness of an image?

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