Changeset 810 for trunk/src/series/calc_background.m
- Timestamp:
- Aug 13, 2014, 3:01:27 AM (11 years ago)
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trunk/src/series/calc_background.m
r245 r810 19 19 %---------------------------------------------------------------------- 20 20 % Method: 21 %calculate the background image by sorting the luminosity of each point22 % over a sliding sub-sequence of 'nbaver_ima' images. 23 %The luminosity value of rank 'rank' is selected as the24 %'background'. rank=nbimages/2 gives the median value. Smaller values are appropriate25 %for a dense set of particles. The extrem value rank=1 gives the true minimum26 % luminosity, but it can be polluted by noise. 21 % calculate the background image by sorting the luminosity of each point 22 % over a sliding sub-sequence of 'nbaver_ima' images. 23 % The luminosity value of rank 'rank' is selected as the 24 % 'background'. rank=nbimages/2 gives the median value. Smaller values are appropriate 25 % for a dense set of particles. The extrem value rank=1 gives the true minimum 26 % luminosity, but it can be polluted by noise. 27 27 % Organization of image indices: 28 % The program is working on a series of images, labelled by two indices i and j, given 29 % by the input matlab vectors num_i1 and num_j1 respectively. In the list, j is the fastest increasing index. 30 % The processing can be done in slices (number nbslice), with bursts of 31 % nbfield2 successive images for a given slice (mode 'multilevel') 32 % In the mode 'volume', nbfield2=1 (1 image at each level) 33 % 28 % The program is working on a series of images, labelled by two indices i and j, given 29 % by the input matlab vectors num_i1 and num_j1 respectively. In the list, j is the fastest increasing index. 30 % The processing can be done in slices (number nbslice), with bursts of 31 % nbfield2 successive images for a given slice (mode 'multilevel') 32 % In the mode 'volume', nbfield2=1 (1 image at each level) 33 34 %======================================================================= 35 % Copyright 2008-2014, LEGI UMR 5519 / CNRS UJF G-INP, Grenoble, France 36 % http://www.legi.grenoble-inp.fr 37 % Joel.Sommeria - Joel.Sommeria (A) legi.cnrs.fr 38 % 39 % This file is part of the toolbox UVMAT. 40 % 41 % UVMAT is free software; you can redistribute it and/or modify 42 % it under the terms of the GNU General Public License as published 43 % by the Free Software Foundation; either version 2 of the license, 44 % or (at your option) any later version. 45 % 46 % UVMAT is distributed in the hope that it will be useful, 47 % but WITHOUT ANY WARRANTY; without even the implied warranty of 48 % MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 49 % GNU General Public License (see LICENSE.txt) for more details. 50 %======================================================================= 51 34 52 function GUI_input=calc_background (num_i1,num_i2,num_j1,num_j2,Series) 35 53
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