irplib_hist-test.c

00001 /*                                                                              *
00002  *   This file is part of the ESO IRPLIB package                                *
00003  *   Copyright (C) 2004,2005 European Southern Observatory                      *
00004  *                                                                              *
00005  *   This library is free software; you can redistribute it and/or modify       *
00006  *   it under the terms of the GNU General Public License as published by       *
00007  *   the Free Software Foundation; either version 2 of the License, or          *
00008  *   (at your option) any later version.                                        *
00009  *                                                                              *
00010  *   This program is distributed in the hope that it will be useful,            *
00011  *   but WITHOUT ANY WARRANTY; without even the implied warranty of             *
00012  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the              *
00013  *   GNU General Public License for more details.                               *
00014  *                                                                              *
00015  *   You should have received a copy of the GNU General Public License          *
00016  *   along with this program; if not, write to the Free Software                *
00017  *   Foundation, 51 Franklin St, Fifth Floor, Boston, MA  02111-1307  USA       *
00018  *                                                                              */
00019  
00020 #ifdef HAVE_CONFIG_H
00021 #include <config.h>
00022 #endif
00023 
00024 /*----------------------------------------------------------------------------
00025                                 Includes
00026  ----------------------------------------------------------------------------*/
00027 
00028 
00029 #include <irplib_hist.h>
00030 
00031 #include <math.h>
00032 /*---------------------------------------------------------------------------*/
00033 /*
00034  * @defgroup irplib_hist_test   Testing of the IRPLIB utilities
00035  */
00036 /*---------------------------------------------------------------------------*/
00037 
00038 
00039 /*----------------------------------------------------------------------------
00040                 Defines
00041  ----------------------------------------------------------------------------*/
00042 
00043 #define NBINS 100
00044 
00045 /*----------------------------------------------------------------------------
00046                             Private Function prototypes
00047  ----------------------------------------------------------------------------*/
00048 
00049 static void irplib_hist_tests(void);
00050 
00051 /*---------------------------------------------------------------------------*/
00052 /*
00053  * @brief   Unit tests of fit module
00054  */
00055 /*---------------------------------------------------------------------------*/
00056 
00057 int main(void)
00058 {
00059     /* Initialize CPL + IRPLIB */
00060     cpl_test_init(PACKAGE_BUGREPORT, CPL_MSG_WARNING);
00061 
00062     irplib_hist_tests();
00063 
00064     return cpl_test_end(0);
00065 }
00066 
00067 static void irplib_hist_tests(void)
00068 {
00069     irplib_hist * hist;
00070     cpl_image * image;
00071     cpl_error_code error;
00072     int i, j;
00073     float * data;
00074 
00075     unsigned long max_where;
00076 
00077     /* 1. trial: Create a right histogram */
00078     hist = irplib_hist_new();
00079     cpl_test_nonnull(hist);
00080     cpl_test_error(CPL_ERROR_NONE);
00081     irplib_hist_delete(hist);
00082 
00083     /* 3. trial: Histogram for a uniform image */
00084     image = cpl_image_new(100, 100, CPL_TYPE_FLOAT);
00085     cpl_image_add_scalar(image, 202);
00086 
00087     hist = irplib_hist_new();
00088 
00089     error = irplib_hist_init(hist, NBINS, 0, 500);
00090     cpl_test_zero(error);
00091     error = irplib_hist_fill(hist, image);
00092     cpl_test_zero(error);
00093 
00094     for(i = 0; i < 40; i++) {
00095     cpl_test_zero(irplib_hist_get_value(hist, i));
00096     }
00097 
00098     /* The following call retrieves the value of the 42-st bin */
00099     /* When i = 41, 42-th is retrieved. 500 - 0 / 100 = 5; 202/5=40,xx
00100        it should be in the 41-th bin but it is in the next one because
00101        there is one before left empty for possible values out of range
00102        0 (hinit) < 202 (image constant)
00103     */
00104 
00105     cpl_test_eq(irplib_hist_get_value(hist, 40), 10000);
00106     for(i = 42; i < NBINS; i++) {
00107     cpl_test_zero(irplib_hist_get_value(hist, i));
00108     }
00109 
00110     irplib_hist_delete(hist);
00111     cpl_image_delete(image);
00112 
00113     /* 4. trial: Histogram for a normal image: no checking of the output */
00114     image = cpl_image_new(100, 100, CPL_TYPE_FLOAT);
00115     cpl_image_fill_noise_uniform(image, 0, 200);
00116 
00117     hist = irplib_hist_new();
00118     error = irplib_hist_fill(hist,image);
00119     cpl_test_zero(error);
00120 
00121     irplib_hist_delete(hist);
00122     cpl_image_delete(image);
00123 
00124     /* 5. trial: Histogram */
00125     image = cpl_image_new(100, 100, CPL_TYPE_FLOAT);
00126     data = cpl_image_get_data_float(image);
00127     for (i = 0; i < 100; i++) {
00128     for (j = 0; j < 100; j++) {
00129         *(data + 100*i + j) = i +j;
00130     }
00131     }
00132 
00133     hist = irplib_hist_new();
00134     error = irplib_hist_fill(hist, image);
00135 
00136     irplib_hist_get_max(hist, &max_where);
00137 
00138     /* The following call retrieves the value of the 41-st bin */
00139     /*  cpl_test_eq(irplib_hist_get_value(hist, 40), 10000);
00140     for(i = 42; i < NBINS; i++) {
00141     cpl_test_zero(irplib_hist_get_value(hist, i));
00142     }*/
00143 
00144     /* 6. trial: all by default ( we use the same image) */
00145 
00146     cpl_test_eq(max_where, irplib_hist_get_nbins(hist)/2);
00147 
00148     irplib_hist_delete(hist);
00149     cpl_image_delete(image);
00150 }

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