Calculate the intensity of all pixel in an immage

I have an immage produced from a "FLIR" cam that applicate an algoritm for polarization. I want to calculate the polarization vector from this immage using the intensity of the pixel of the immage. How i can calculate the intensity of each pixel in the immage?

[Rik]

Images in Matlab are already arrays. So as long as your FLIR images can be loaded as grayscale images you already have the intensity of every pixel available in Matlab.

[valerio auricchio]

If The immage is in gray scale how can i store The intenditi of each pixel?

[Rik]

If you have the grayscale image it already is the instensity (unless your camera scaled it, in which case you need the calibration from your camera). Your question is the same as 'if I have an image, how can I store the color of each pixel'.

[valerio auricchio]

What is The code for calculate The intensity of an area of The matrix

[Rik]

That depends on what you mean by intensity of an area. The average? The maximum? The 95th percentile?

And why do you capitalize every 'the'? It is a bit distracting.

[valerio auricchio]

Sorry for capitalizing "the" :).

I link you the photo that I'm using, I want to calculate the avrage of intensity in the region.

Can you help me with the code?

I read that with the command "regionprops" it's possible to select the region directly on the immage.

Answer 1

[Priysha LNU]

The 'REGIONPROPS' command from the Image Processing Toolbox can calculate the minimum, maximum, and average intensity of regions. You can use 'regionprops()' function and ask for the mean intensity of all the blobs by setting the 'Pixel Value Measurements' property.

labeledImage = bwlabel(binaryImage);
measurements = regionprops(labeledImage, grayscaleImage, 'MeanIntensity');

For more information on the REGIONPROPS function, type

doc regionprops

at the MATLAB Command Window, or go to this documentation link.

DISCLAIMER: These are my own views and in no way depict those of MathWorks.