What is this code doing exactly?

Here's a code that i got from a random source..... Please explain the logic of this above given code.... I am not getting the logic at all.... Please help....

      for a=1:20
  if a<=9
  b=char(a+47);
  elseif a>9 && a<20
  b=strcat(char(49),char(a-10+48));
  else
  b=strcat(char(50),char(48));
  end
  filemane=strcat('D:\my doc\study docs\Project-VP\code\',b,'.tif');
  fluent=imread(filemane,'tif');
  filename2=strcat('D:\my doc\study docs\Project-VP\code\',b,'.tif');
  flowvis=imread(filename2,'tif');
  size_fluent=size(fluent);
  size_flowvis=size(flowvis);
  for k=1:size_fluent(1)
  for l=1:size_fluent(2)
  for m=1:size_fluent(3)
   if l<(260+(4*a)) || l>(948+(4*a))
  %l=302, l=988
  overlap(k,l,m)=fluent(k,l,m);
  else
  if k<43 || k>706
  overlap(k,l,m)=fluent(k,l,m);
  elseif fluent(k,l,1)>=200 && fluent(k,l,2)>=200 && fluent(k,l,3)>=200
  overlap(k,l,m)=flowvis(k-42,l-(259+(4*a)),m); %l-301
  else
  overlap(k,l,m)=fluent(k,l,m);
  end
  end
  end
  end
  end
  filename3=strcat('D:\my doc\study docs\Project-VP\code\frames\output_',b,'.tif');
  imwrite(overlap,filename3,'tif','Colorspace','rgb','Compression','none');
  disp(strcat('File ',b,' processed'));
   end

[Jan]

This is a very vague question. Are you asking also, what e.g. "if k<43 k>706" does?

The code is written in a strange way. E.g. b=strcat(char(49),char(a-10+48)); is an obfuscated version of: b = '20'. A clean sprintf command would be much smarter than the first 8 lines.

[Febin Benjamin]

Exactly! thats what confused me! The code is completely abstruse! I found it in a pdf file which named this program as compare.m All i cud comprehend was that it is comparing two images.... but on what basis?? this code kept me awake yesterday! :(

Answer 1

[Iain]

looks like its opening some pairs of files and overlaying some parts of the second image on the first, and saving the result.

[Febin Benjamin]

Seems like it!