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how to reduce the brightness of an image?

조회 수: 3 (최근 30일)
Sivakumaran Chandrasekaran
Sivakumaran Chandrasekaran 2012년 9월 11일
답변: DGM 2022년 4월 28일
In MATLAB there are direct commands to enhance the brightness. I need to reduce it. How to achieve it.

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답변 (3개)

Rene
Rene 2012년 9월 11일
image = image./3;
imshow(image,[0 255])
yields a threefold reduction
Image Analyst
Image Analyst 2012년 9월 11일
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 2022년 4월 28일
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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