luminance of an image

5 次查看（过去 30 天）

umar siyab 2012-4-2

1
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/34319-luminance-of-an-image

how can i take the luminance of an image in matlab if i have i 256x256 image and i want the luminance of gray scale... what procedure for that can anyone tell me

thnx in advance regards

回答（1 个）

Image Analyst 2012-4-2

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/34319-luminance-of-an-image#answer_43033

Use rgb2gray() if you're starting with an RGB image.

2 个评论
显示无隐藏无

umar siyab 2012-4-3

i know that dear i m talking about the luminance of an image will you get my question?????

Image Analyst 2012-4-3

Then if you REALLY want luminance (http://en.wikipedia.org/wiki/Luminance) in units of candela per square meter, you're going to have to do a radiometric calibration. Basically make a relationship between your recorded gray level and the "known" luminance from a light emitting source that has been measured with an instrument that measures in candelas per square meter or nits.

请先登录，再进行评论。

请先登录，再回答此问题。