2D image improfile function help

There are two things I would like to do with this function.

First one is to determine max intensity:

1. Scan the y-coordinate for the highest intensity value, then record it as the intensity for this x-coordinate. 2. Do this for the entire length of the image. 3. Plot max intensity vs x-axis.

Second is to average this intensity graph.

1. Read subsequent images (extracted frames from a video file) 2. Have an average plot of max intensity vs x-axis.

The main purpose is to identify the flame section against a black background (see attached).

[Geoff Hayes]

There is no file attached.

[Image Analyst]

What is the question? And are you taking columns from the image as you go across (in which case you don't need improfile) or are you going from one pixel to another at an arbitrary distance and angle (in which case you'll need improfile)?

[A Sez]

Hi, I've attached the file. Basically I want to get the peak intensity accross the x-axis (L to R) of that picture. As you see it is quite all over the place Hope that clarifies it

Answer 1

[Image Analyst]

Why not use the max() function along the rows dimension?

maxValuesAlongX = max(grayImage, [], 1); % Max along dimension 1 (rows)