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/******************************************************************************
* Copyright (C) 2018 Alejandro Colomar Andrés *
* SPDX-License-Identifier: GPL-2.0-only *
******************************************************************************/
/******************************************************************************
******* headers **************************************************************
******************************************************************************/
#include "coins/coins.h"
#include <stddef.h>
#include <stdint.h>
#include <stdio.h>
#include <time.h>
#include <opencv2/imgproc/types_c.h>
#include <libalx/base/compiler/size.h>
#include <libalx/base/errno/error.h>
#include <libalx/base/stdlib/maximum.h>
#include <libalx/extra/cv/alx.h>
#include <libalx/extra/cv/core.h>
#include <libalx/extra/cv/highgui.h>
#include <libalx/extra/cv/imgproc.h>
/******************************************************************************
******* macros ***************************************************************
******************************************************************************/
#define COIN_DIAMETER_2E (25.75)
#define COIN_LIM_2E_50c (25.00)
#define COIN_DIAMETER_50c (24.25)
#define COIN_LIM_50c_1E (23.70)
#define COIN_DIAMETER_1E (23.25)
#define COIN_LIM_1E_20c (22.65)
#define COIN_DIAMETER_20c (22.25) // That's the outer diameter!
#define COIN_LIM_20c_5c (21.50)
#define COIN_DIAMETER_5c (21.25)
#define COIN_LIM_5c_10c (20.50)
#define COIN_DIAMETER_10c (19.75)
#define COIN_LIM_10c_2c (19.25)
#define COIN_DIAMETER_2c (18.75)
#define COIN_LIM_2c_1c (17.50)
#define COIN_DIAMETER_1c (16.25)
/******************************************************************************
******* enums ****************************************************************
******************************************************************************/
/******************************************************************************
******* structs / unions *****************************************************
******************************************************************************/
struct Coins {
ptrdiff_t x;
ptrdiff_t y;
float diameter_pix;
double diameter_mm;
double value;
};
/******************************************************************************
******* variables ************************************************************
******************************************************************************/
/******************************************************************************
******* static functions (prototypes) ****************************************
******************************************************************************/
static
int init_cv (img_s **img_1, img_s **img_2);
static
void deinit_cv (img_s *img_1, img_s *img_2);
static
int proc_coins_steps (const char *restrict fname);
static
int coins_positions (img_s *restrict img, ptrdiff_t nmemb,
struct Coins coins[static restrict nmemb],
ptrdiff_t *ncoins);
static
int coins_diameters_pix (const img_s *restrict img, ptrdiff_t n,
struct Coins coins[static restrict n]);
static
double calibrate_mm_per_pix (float max_radius_pix);
static
void coins_diameters_mm (double mm_per_pix, ptrdiff_t n,
struct Coins coins[static restrict n]);
static
int coins_values (ptrdiff_t n,
struct Coins coins[static restrict n]);
static
double coin_value (double diameter_mm);
static
double coins_total_value (ptrdiff_t n,
const struct Coins coins[static restrict n]);
static
void report (ptrdiff_t n,
const struct Coins coins[static restrict n],
double tot);
/******************************************************************************
******* global functions *****************************************************
******************************************************************************/
int proc_coins (const char *restrict fname)
{
clock_t time_0;
clock_t time_1;
double time_tot;
time_0 = clock();
if (proc_coins_steps(fname))
return -1;
time_1 = clock();
time_tot = ((double) time_1 - time_0) / CLOCKS_PER_SEC;
printf("Total time: %5.3lf s;\n", time_tot);
return 0;
}
/******************************************************************************
******* static functions (definitions) ***************************************
******************************************************************************/
static
int init_cv (img_s **img_1, img_s **img_2)
{
if (alx_cv_alloc_img(img_1))
return -1;
if (alx_cv_init_img(*img_1, 1, 1))
goto out_free_1;
if (alx_cv_alloc_img(img_2))
goto out_deinit_1;
if (alx_cv_init_img(*img_2, 1, 1))
goto out_free_2;
return 0;
out_free_2:
alx_cv_free_img(img_2);
out_deinit_1:
alx_cv_deinit_img(img_1);
out_free_1:
alx_cv_free_img(img_1);
return -1;
}
static
void deinit_cv (img_s *img_1, img_s *img_2)
{
alx_cv_deinit_img(img_2);
alx_cv_free_img(img_2);
alx_cv_deinit_img(img_1);
alx_cv_free_img(img_1);
}
static
int proc_coins_steps (const char *restrict fname)
{
img_s *img;
img_s *img_dt;
float max_r_pix;
struct Coins coins[BUFSIZ];
ptrdiff_t ncoins;
int status;
double mm_per_pix;
double value_total;
status = -1;
if (init_cv(&img, &img_dt))
return -1;
if (alx_cv_imread(img, fname))
goto err;
if (alx_cv_component(img, ALX_CV_CMP_BLUE))
goto err;
if (alx_cv_threshold(img, CV_THRESH_BINARY_INV, ALX_CV_THR_OTSU))
goto err;
// alx_cv_invert(img); /* Only if the source image is inverted */
// alx_cv_imwrite(img, "/home/alex/Downloads/coins_thr.png");
if (alx_cv_distance_transform(img))
goto err;
if (alx_cv_maximum_flt(img, &max_r_pix))
goto err;
/* Calibrate with the biggest coin; every img should have a 2 € coin */
/* TODO: Fix this: should calibrate with a pattern, or else */
mm_per_pix = calibrate_mm_per_pix(max_r_pix);
alx_cv_clone(img_dt, img);
// alx_cv_imwrite(img_dt, "/home/alex/Downloads/coins_img_dt.png");
if (alx_cv_threshold(img, CV_THRESH_TOZERO,
(COIN_DIAMETER_1c / 2.0 - 0.5) / mm_per_pix))
goto err;
// alx_cv_imwrite(img, "/home/alex/Downloads/coins_img_dt_thr.png");
if (alx_cv_local_max(img))
goto err;
if (alx_cv_dilate(img, 2))
goto err;
// alx_cv_imwrite(img, "/home/alex/Downloads/coins_locmax.png");
if (coins_positions(img, ARRAY_SIZE(coins), coins, &ncoins))
goto err;
// alx_cv_imwrite(img, "/home/alex/Downloads/coins_contours.png");
if (coins_diameters_pix(img_dt, ncoins, coins))
goto err;
/* Get coins diameters in mm */
coins_diameters_mm(mm_per_pix, ncoins, coins);
/* Get coins values (by their sizes) */
printf("mm/pix = %lf\n", mm_per_pix);
if (coins_values(ncoins, coins))
goto err;
/* Add total value */
value_total = coins_total_value(ncoins, coins);
report(ncoins, coins, value_total);
status = 0;
err:
deinit_cv(img, img_dt);
return status;
}
static
int coins_positions (img_s *restrict img, ptrdiff_t nmemb,
struct Coins coins[static restrict nmemb],
ptrdiff_t *ncoins)
{
conts_s *conts;
rect_s *rect;
const cont_s *cont;
int status;
ptrdiff_t x, y, w, h;
status = -1;
if (alx_cv_alloc_conts(&conts))
return -1;
alx_cv_init_conts(conts);
if (alx_cv_alloc_rect(&rect))
goto out_deinit_conts;
if (alx_cv_contours(img, conts))
goto out_free;
alx_cv_extract_conts(conts, NULL, ncoins);
if (*ncoins > nmemb)
goto out_free;
for (ptrdiff_t i = 0; i < *ncoins; i++) {
if (alx_cv_extract_conts_cont(&cont, conts, i))
goto out_free;
alx_cv_bounding_rect(rect, cont);
//alx_cv_draw_rect(img, rect);
alx_cv_extract_rect(rect, &x, &y, &w, &h);
coins[i].x = x + w / 2;
coins[i].y = y + h / 2;
}
status = 0;
out_free:
alx_cv_free_rect(rect);
out_deinit_conts:
alx_cv_deinit_conts(conts);
alx_cv_free_conts(conts);
return status;
}
static
int coins_diameters_pix (const img_s *restrict img, ptrdiff_t n,
struct Coins coins[static restrict n])
{
float tmp;
for (ptrdiff_t i = 0; i < n; i++) {
if (alx_cv_pixel_get_flt(img, &tmp, coins[i].x, coins[i].y))
return -1;
coins[i].diameter_pix = tmp * 2.0f;
}
return 0;
}
static
double calibrate_mm_per_pix (float max_radius_pix)
{
return 25.75 / (max_radius_pix * 2.0);
}
static
void coins_diameters_mm (double mm_per_pix, ptrdiff_t n,
struct Coins coins[static restrict n])
{
for (ptrdiff_t i = 0; i < n; i++)
coins[i].diameter_mm = mm_per_pix * coins[i].diameter_pix;
}
static
int coins_values (ptrdiff_t n,
struct Coins coins[static restrict n])
{
for (ptrdiff_t i = 0; i < n; i++) {
coins[i].value = coin_value(coins[i].diameter_mm);
if (coins[i].value < 0)
return -1;
}
return 0;
}
static
double coin_value (double diameter_mm)
{
if (diameter_mm > (COIN_DIAMETER_2E + 1.5))
return -1;
if (diameter_mm > COIN_LIM_2E_50c)
return 2.00;
if (diameter_mm > COIN_LIM_50c_1E)
return 0.50;
if (diameter_mm > COIN_LIM_1E_20c)
return 1.00;
if (diameter_mm > COIN_LIM_20c_5c)
return 0.20;
if (diameter_mm > COIN_LIM_5c_10c)
return 0.05;
if (diameter_mm > COIN_LIM_10c_2c)
return 0.10;
if (diameter_mm > COIN_LIM_2c_1c)
return 0.02;
if (diameter_mm > (COIN_DIAMETER_1c - 1.5))
return 0.01;
return -1;
}
static
double coins_total_value (ptrdiff_t n,
const struct Coins coins[static restrict n])
{
double tot;
tot = 0.00;
for (ptrdiff_t i = 0; i < n; i++)
tot += coins[i].value;
return tot;
}
static
void report (ptrdiff_t n,
const struct Coins coins[static restrict n],
double tot)
{
for (ptrdiff_t i = 0; i < n; i++) {
printf("Coin[%ti]:\n", i);
printf(" pos = (%4ti, %4ti);\n",
coins[i].x, coins[i].y);
printf(" d = %3.1f pix = %5.2lf mm;\n",
coins[i].diameter_pix, coins[i].diameter_mm);
printf(" val = %5.2lf EUR;\n", coins[i].value);
}
printf("Total value: %5.2lf EUR;\n", tot);
}
/******************************************************************************
******* end of file **********************************************************
******************************************************************************/
|
