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/******************************************************************************
* Copyright (C) 2018 Alejandro Colomar Andrés *
* SPDX-License-Identifier: GPL-2.0-only *
******************************************************************************/
/******************************************************************************
******* headers **************************************************************
******************************************************************************/
#include "vision-artificial/proc/label.hpp"
#include <cstdio>
#include <cstring>
#include <opencv2/opencv.hpp>
#include <zbar.h>
#include "libalx/base/stdlib/swap.hpp"
#include "vision-artificial/image/iface.hpp"
#include "vision-artificial/proc/common.hpp"
#include "vision-artificial/user/iface.hpp"
/******************************************************************************
******* macros ***************************************************************
******************************************************************************/
/******************************************************************************
******* enums ****************************************************************
******************************************************************************/
/******************************************************************************
******* structs / unions *****************************************************
******************************************************************************/
/******************************************************************************
******* variables ************************************************************
******************************************************************************/
/* Global --------------------------------------------------------------------*/
/* Static --------------------------------------------------------------------*/
static class std::vector <class std::vector <class cv::Point_ <int>>> contours;
static class cv::Mat hierarchy;
static class cv::RotatedRect rect;
/******************************************************************************
******* static functions (prototypes) ****************************************
******************************************************************************/
static void result_label (int status);
static int label_find (void);
static void label_align (void);
static int find_cerdo (void);
static int barcode_read (void);
static int barcode_chk_prod(void);
static void price_read (void);
static int price_chk (void);
/******************************************************************************
******* global functions *****************************************************
******************************************************************************/
int proc_label (void)
{
int status;
proc_save_mem(0);
/* Find label (position and angle) */
clock_start();
status = label_find();
if (status) {
result_label(status);
return status;
}
clock_stop("Find label");
/* Align label and extract green component */
clock_start();
label_align();
clock_stop("Align label");
/* Find "Cerdo" in aligned image */
clock_start();
status = find_cerdo();
if (status) {
result_label(status);
return status;
}
clock_stop("Find cerdo (OCR)");
/* Read barcode in original image */
clock_start();
status = barcode_read();
if (status) {
result_label(status);
return status;
}
clock_stop("Read barcode (zbar)");
/* Check product code in barcode */
clock_start();
status = barcode_chk_prod();
if (status) {
result_label(status);
return status;
}
clock_stop("Chk product code");
/* Read price in aligned image (green component) */
clock_start();
price_read();
clock_stop("Read price (OCR)");
/* Check label price with barcode price */
clock_start();
status = price_chk();
if (status) {
result_label(status);
return status;
}
clock_stop("Check price");
result_label(LABEL_OK);
return 0;
}
/******************************************************************************
******* static functions (definitions) ***************************************
******************************************************************************/
static void result_label (int status)
{
switch (status) {
case LABEL_OK:
user_iface_log_write(0, "Label: OK");
break;
case LABEL_NOK_LABEL:
user_iface_log_write(0, "Label: NOK_LABEL");
break;
case LABEL_NOK_CERDO:
user_iface_log_write(0, "Label: NOK_CERDO");
break;
case LABEL_NOK_BCODE:
user_iface_log_write(0, "Label: NOK_BCODE");
break;
case LABEL_NOK_PRODUCT:
user_iface_log_write(0, "Label: NOK_PRODUCT");
break;
case LABEL_NOK_PRICE:
user_iface_log_write(0, "Label: NOK_PRICE");
break;
default:
user_iface_log_write(0, "Label: NOK");
break;
}
}
static int label_find (void)
{
proc_load_mem(0);
proc_cmp(IMG_IFACE_CMP_BLUE);
proc_smooth(IMGI_SMOOTH_MEDIAN, 7);
#if 0
proc_adaptive_threshold(CV_ADAPTIVE_THRESH_MEAN_C,
CV_THRESH_BINARY, 5);
#else
proc_not();
#endif
proc_smooth(IMGI_SMOOTH_MEAN, 21);
proc_threshold(cv::THRESH_BINARY_INV, 2);
proc_dilate_erode(100);
proc_contours(&contours, &hierarchy);
if (!contours.size())
return LABEL_NOK_LABEL;
proc_min_area_rect(&contours[0], &rect, true);
/* If angle is < -45º, it is taking into acount the incorrect side */
if (rect.angle < -45.0) {
rect.angle += 90.0;
ALX_SWAP(&rect.size.width, &rect.size.height);
}
return 0;
}
static void label_align (void)
{
proc_load_mem(0);
proc_rotate(rect.center.x, rect.center.y, rect.angle);
proc_cmp(IMG_IFACE_CMP_GREEN);
proc_save_mem(1);
}
static int find_cerdo (void)
{
int x, y;
int w, h;
proc_load_mem(1);
x = rect.center.x - (1.05 * rect.size.width / 2);
if (x < 0)
x = 0;
y = rect.center.y - (1.47 * rect.size.height / 2);
if (y < 0)
y = 0;
w = rect.size.width / 2;
h = rect.size.height * 0.20;
proc_ROI(x, y, w, h);
proc_threshold(cv::THRESH_BINARY, IMG_IFACE_THR_OTSU);
proc_erode(1);
proc_OCR(IMG_IFACE_OCR_LANG_ENG, IMG_IFACE_OCR_CONF_NONE);
if (strncmp(img_ocr_text, "Cerdo", strlen("Cerdo")))
return LABEL_NOK_CERDO;
return 0;
}
static int barcode_read (void)
{
proc_load_mem(0);
proc_cmp(IMG_IFACE_CMP_GREEN);
proc_zbar(zbar::ZBAR_EAN13);
if (zb_codes.n != 1)
return LABEL_NOK_BCODE;
return 0;
}
static int barcode_chk_prod(void)
{
if (strncmp(zb_codes.arr[0].data, "2301703", strlen("2301703")))
return LABEL_NOK_PRODUCT;
return LABEL_OK;
}
static void price_read (void)
{
int x, y;
int w, h;
proc_load_mem(1);
x = rect.center.x + (0.33 * rect.size.width / 2);
y = rect.center.y + (0.64 * rect.size.height / 2);
w = rect.size.width * 0.225;
h = rect.size.height * 0.15;
proc_ROI(x, y, w, h);
proc_smooth(IMGI_SMOOTH_MEAN, 3);
proc_threshold(cv::THRESH_BINARY, IMG_IFACE_THR_OTSU);
proc_dilate_erode(1);
proc_threshold(cv::THRESH_BINARY, 1);
proc_OCR(IMG_IFACE_OCR_LANG_DIGITS, IMG_IFACE_OCR_CONF_PRICE);
}
static int price_chk (void)
{
char price[80];
/* Extract price from barcode */
if (zb_codes.arr[0].data[8] != '0') {
snprintf(price, 80, "%c%c.%c%c",
zb_codes.arr[0].data[8],
zb_codes.arr[0].data[9],
zb_codes.arr[0].data[10],
zb_codes.arr[0].data[11]);
} else {
snprintf(price, 80, "%c.%c%c",
zb_codes.arr[0].data[9],
zb_codes.arr[0].data[10],
zb_codes.arr[0].data[11]);
}
/* Compare price from barcode and from text */
if (strncmp(img_ocr_text, price, strlen(price)))
return LABEL_NOK_PRICE;
return 0;
}
/******************************************************************************
******* end of file **********************************************************
******************************************************************************/
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