How can i observe a 3 dimensional matrix(hdr) using pcolor command?

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Nithya 2013-11-8

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https://ww2.mathworks.cn/matlabcentral/answers/105324-how-can-i-observe-a-3-dimensional-matrix-hdr-using-pcolor-command

编辑： Nithya 2013-11-19

采纳的回答： Walter Roberson

在 MATLAB Online 中打开

I have with me,

file={'img1.jpg','img2.jpg','img3.jpg','img4.jpg','img5.jpg'};
hdr = makehdr(file);

hdr is 1728x2592x3 single matrix

I want to display this image file in pseudocolor.

my aim is to get the light intensity values. What shall i do?

Thank you

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Walter Roberson 2013-11-8

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https://ww2.mathworks.cn/matlabcentral/answers/105324-how-can-i-observe-a-3-dimensional-matrix-hdr-using-pcolor-command#answer_114547

编辑：Walter Roberson 2013-11-8

在 MATLAB Online 中打开

image(rgb2gray(hdr));
colormap(gray(256))

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Walter Roberson 2013-11-18

It would be more like a calibration curve, not a single factor.

Whether the values are linearly proportional to the radiance or the light falling on the scene is going to depend on what kind of detector you are using. It is not uncommon for detectors to go non-linear at the extreme ends, usually with increased sensitivity in low low light and decreased sensitivity in bright light.

Nithya 2013-11-19