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POMatlab video processing of heart beating. code supplemented
 

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  1. POMatlab video processing of heart beating. code supplemented
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    <p>I'm trying to write a code The helps me in my biology work. Concept of code is to analyze a video file of contracting cells in a tissue</p> <p><a href="http://youtube.com/watch?v=f9xgDnkkPt0" rel="nofollow noreferrer">Example 1</a> </p> <p>Example 2: youtube.com/watch?v=uG_WOdGw6Rk</p> <p>And plot out the following:</p> <ol> <li>Count of beats per min.</li> <li>Strenght of Beat</li> <li>Regularity of beating</li> </ol> <p>And so i wrote a Matlab code that would loop through a video and compare each frame vs the one that follow it, and see if there was any changes in frames and plot these changes on a curve.</p> <p>Example of My code Results <img src="https://i.stack.imgur.com/4eFZz.jpg" alt="enter image description here"></p> <p>Core of Current code i wrote:</p> <pre><code>for i=2:totalframes compared=read(vidObj,i); ref=rgb2gray(compared);%% convert to gray level=graythresh(ref);%% calculate threshold compared=im2bw(compared,level);%% convert to binary differ=sum(sum(imabsdiff(vid,compared))); %% get sum of difference between 2 frames if (differ ~=0) &amp;&amp; (any(amp==differ)==0) %%0 is = no change happened so i dont wana record that ! amp(end+1)=differ; % save difference to array amp wi time(end+1)=i/framerate; %save to time array with sec's, used another array so i can filter both later. vid=compared; %% save current frame as refrence to compare the next frame against. end end figure,plot(amp,time); </code></pre> <p>=====================</p> <p>So thats my code, but is there a way i can improve it so i can get better results ?</p> <p>because i get fealing that imabsdiff is not exactly what i should use because my video contain alot of noise and that affect my results alot, and i think all my amp data is actually faked !</p> <p>Also i actually can only extract beating rate out of this, by counting peaks, but how can i improve my code to be able to get all required data out of it ??</p> <p>thanks also really appreciate your help, this is a small portion of code, if u need more info please let me know. thanks</p>
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    1. CONote: youtube example is just a croped small part of original video, for size sake !
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    2. COCould you be more specific about how you want your results to be better? It looks like your results show very clear peaks. How would you like to improve them?
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