Is it possible to subtract the baseline of a graph from the peak using the curvefitter toolbox?

Question

Akshay Arvind 2024-5-1

0
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https://ww2.mathworks.cn/matlabcentral/answers/2113941-is-it-possible-to-subtract-the-baseline-of-a-graph-from-the-peak-using-the-curvefitter-toolbox

评论： Akshay Arvind 2024-5-1

Hello,

I have an image (1024x1024) which shows a laser beam (I hope it is clear in the image) and a background, and it looks like this:

What I have done so far is, choose a specific column range, and calculate the average intensity of each row, and store it in a matrix (1024x1), to plot the average intensityalong the 1024 rows like this:

I have highlighted in red, the baseline, and the unhighlighted peak depicts the laser beam.

What I want to do is, create a separate fit for the baseline (constant) and subtract it from the entire plot, to calculate the average intensity under the entire area of the peak alone. Would that be possible using the curve fitter toolbox in MATLAB? If not, are there other ways to do it?

Best regards,

Akshay.