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/******************************************************************************
* Copyright (C) 2018 Alejandro Colomar Andrés *
* SPDX-License-Identifier: GPL-2.0-only *
******************************************************************************/
/******************************************************************************
******* headers **************************************************************
******************************************************************************/
#include "vision-artificial/proc/coins.hpp"
#include <cstdio>
#include <opencv2/opencv.hpp>
#include "libalx/base/math/arithmetic_mean.hpp"
#include "libalx/base/stddef/size.hpp"
#include "libalx/base/stdlib/maximum.hpp"
#include "vision-artificial/image/iface.hpp"
#include "vision-artificial/user/iface.hpp"
#include "vision-artificial/proc/common.hpp"
/******************************************************************************
******* macros ***************************************************************
******************************************************************************/
#define COINS_MAX (0xFFF)
#define COIN_DIAMETER_2E (25.75)
#define COIN_DIAMETER_50c (24.25)
#define COIN_DIAMETER_1E (23.25)
#define COIN_DIAMETER_20c (22.25)
#define COIN_DIAMETER_5c (21.25)
#define COIN_DIAMETER_10c (19.75)
#define COIN_DIAMETER_2c (18.75)
#define COIN_DIAMETER_1c (16.25)
/******************************************************************************
******* enums ****************************************************************
******************************************************************************/
/******************************************************************************
******* structs / unions *****************************************************
******************************************************************************/
struct Coins_Properties {
ptrdiff_t x;
ptrdiff_t y;
uint8_t diameter_pix;
double diameter_mm;
double value;
};
/******************************************************************************
******* variables ************************************************************
******************************************************************************/
/* Global --------------------------------------------------------------------*/
/* Static --------------------------------------------------------------------*/
static class std::vector <class std::vector <class cv::Point_ <int>>> contours;
static class cv::Mat hierarchy;
static class cv::Rect_ <int> rectangle[COINS_MAX];
static ptrdiff_t coins_n;
static struct Coins_Properties coins[COINS_MAX];
static double ratio_mm_per_pix;
static double value_total;
/******************************************************************************
******* static functions (prototypes) ****************************************
******************************************************************************/
static void result_coins (int status);
static void coins_segmentate (void);
static int coins_positions (void);
static void coins_diameters_pix (void);
static void calibrate_mm_per_pix (void);
static void coins_diameters_mm (void);
static int coins_values (void);
static double coin_value (double diameter_mm);
static void coins_total_value (void);
/******************************************************************************
******* global functions *****************************************************
******************************************************************************/
int proc_coins (void)
{
int status;
proc_save_mem(0);
/* Segmentate coins */
clock_start();
coins_segmentate();
clock_stop("Segmentate coins");
/* Find coins positions */
clock_start();
status = coins_positions();
if (status) {
result_coins(status);
return status;
}
clock_stop("Find coins positions");
/* Get coin diameters in pixels */
clock_start();
coins_diameters_pix();
clock_stop("Coins diameters in pixels");
/* Calibrate with the biggest coin; every img should have a 2 € coin */
clock_start();
calibrate_mm_per_pix();
clock_stop("Calibrate (mm per pix)");
/* Get coins diameters in mm */
clock_start();
coins_diameters_mm();
clock_stop("Coins diameters in mm");
/* Get coins values (by their sizes) */
clock_start();
status = coins_values();
if (status) {
result_coins(status);
return status;
}
clock_stop("Coins values");
/* Add total value */
clock_start();
coins_total_value();
clock_stop("Total value");
result_coins(COINS_OK);
return 0;
}
/******************************************************************************
******* static functions (definitions) ***************************************
******************************************************************************/
static void result_coins (int status)
{
switch (status) {
case COINS_OK:
user_iface_log_write(0, "Coin: OK");
break;
case COINS_NOK_COINS:
user_iface_log_write(0, "Coin: NOK_COINS");
break;
#if 0
case COINS_NOK_OVERLAP:
user_iface_log_write(0, "Coin: NOK_OVERLAP");
break;
#endif
case COINS_NOK_SIZE:
user_iface_log_write(0, "Coin: NOK_SIZE");
break;
default:
user_iface_log_write(0, "Coin: NOK");
break;
}
}
static void coins_segmentate (void)
{
proc_load_mem(0);
proc_cmp(IMG_IFACE_CMP_BLUE);
proc_threshold(cv::THRESH_BINARY_INV, IMG_IFACE_THR_OTSU);
proc_distance_transform();
proc_local_max();
proc_dilate(6);
proc_save_mem(1);
}
static int coins_positions (void)
{
proc_load_mem(1);
proc_contours(&contours, &hierarchy);
coins_n = contours.size();
if (!coins_n)
return COINS_NOK_COINS;
for (ptrdiff_t i = 0; i < coins_n; i++) {
proc_bounding_rect(&contours[i], &rectangle[i], true);
coins[i].x = rectangle[i].x + rectangle[i].width / 2.0;
coins[i].y = rectangle[i].y + rectangle[i].height / 2.0;
}
return 0;
}
static void coins_diameters_pix (void)
{
proc_load_mem(1);
for (ptrdiff_t i = 0; i < coins_n; i++) {
proc_pixel_get(coins[i].x, coins[i].y, &coins[i].diameter_pix);
coins[i].diameter_pix *= 2;
}
}
static void calibrate_mm_per_pix (void)
{
uint8_t coins_size_pix[coins_n];
int max_pos;
int max_size;
for (ptrdiff_t i = 0; i < coins_n; i++)
coins_size_pix[i] = coins[i].diameter_pix;
max_pos = alx_maximum_u8(ARRAY_SIZE(coins_size_pix), coins_size_pix);
max_size = coins_size_pix[max_pos];
ratio_mm_per_pix = 25.75 / max_size;
}
static void coins_diameters_mm (void)
{
char txt[LOG_LINE_LEN];
for (ptrdiff_t i = 0; i < coins_n; i++) {
coins[i].diameter_mm = ratio_mm_per_pix * coins[i].diameter_pix;
snprintf(txt, LOG_LINE_LEN, "Coin[%ti]: %.2lf mm",
i, coins[i].diameter_mm);
user_iface_log_write(0, txt);
}
}
static int coins_values (void)
{
char txt[LOG_LINE_LEN];
for (ptrdiff_t i = 0; i < coins_n; i++) {
coins[i].value = coin_value(coins[i].diameter_mm);
if (coins[i].value < 0)
return COINS_NOK_SIZE;
snprintf(txt, LOG_LINE_LEN, "Coin[%ti]: %.2lf EUR",
i, coins[i].value);
user_iface_log_write(0, txt);
}
return 0;
}
static double coin_value (double diameter_mm)
{
if (diameter_mm > (COIN_DIAMETER_2E + 1.5))
return -1;
if (diameter_mm > AVGfast(COIN_DIAMETER_2E, COIN_DIAMETER_50c,double_t))
return 2.00;
if (diameter_mm > AVGfast(COIN_DIAMETER_50c, COIN_DIAMETER_1E,double_t))
return 0.50;
if (diameter_mm > AVGfast(COIN_DIAMETER_1E, COIN_DIAMETER_20c,double_t))
return 1.00;
if (diameter_mm > AVGfast(COIN_DIAMETER_20c, COIN_DIAMETER_5c,double_t))
return 0.20;
if (diameter_mm > AVGfast(COIN_DIAMETER_5c, COIN_DIAMETER_10c,double_t))
return 0.05;
if (diameter_mm > AVGfast(COIN_DIAMETER_10c, COIN_DIAMETER_2c,double_t))
return 0.10;
if (diameter_mm > AVGfast(COIN_DIAMETER_2c, COIN_DIAMETER_1c, double_t))
return 0.02;
if (diameter_mm > (COIN_DIAMETER_1c - 1.5))
return 0.01;
return -1;
}
static void coins_total_value (void)
{
char txt[LOG_LINE_LEN];
value_total = 0.00;
for (ptrdiff_t i = 0; i < coins_n; i++)
value_total += coins[i].value;
snprintf(txt, LOG_LINE_LEN, "Total value: %.2lf EUR",value_total);
user_iface_log_write(0, txt);
}
/******************************************************************************
******* end of file **********************************************************
******************************************************************************/
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