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/******************************************************************************
* Copyright (C) 2018 Alejandro Colomar Andrés *
******************************************************************************/
/******************************************************************************
******* headers **************************************************************
******************************************************************************/
/* Standard C ----------------------------------------------------------------*/
/* INT_MAX */
#include <limits.h>
/* snprintf() & FILENAME_MAX */
#include <stdio.h>
/* Packages ------------------------------------------------------------------*/
/* OCR Tesseract */
#include <tesseract/capi.h>
/* Project -------------------------------------------------------------------*/
/* share_path */
#include "about.h"
/* Module --------------------------------------------------------------------*/
/* data & img_ocr_text & OCR_TEXT_MAX */
#include "img_iface.h"
#include "img_ocr.h"
/******************************************************************************
******* static functions *****************************************************
******************************************************************************/
static void img_ocr_read (void *data);
/******************************************************************************
******* main *****************************************************************
******************************************************************************/
void img_ocr_act (int action, void *data)
{
switch (action) {
case IMG_OCR_ACT_READ:
img_ocr_read(data);
break;
}
}
/******************************************************************************
******* static functions *****************************************************
******************************************************************************/
static void img_ocr_read (void *data)
{
struct TessBaseAPI *handle_ocr;
/* Data */
struct Img_Iface_Data_Read *data_cast;
data_cast = (struct Img_Iface_Data_Read *)data;
/* Language */
int lang;
char lang_str [20 + 1];
lang = data_cast->lang;
switch (lang) {
case IMG_IFACE_OCR_LANG_ENG:
sprintf(lang_str, "eng");
break;
case IMG_IFACE_OCR_LANG_SPA:
sprintf(lang_str, "spa");
break;
case IMG_IFACE_OCR_LANG_CAT:
sprintf(lang_str, "cat");
break;
case IMG_IFACE_OCR_LANG_DIGITS:
sprintf(lang_str, "digits");
break;
case IMG_IFACE_OCR_LANG_DIGITS_COMMA:
sprintf(lang_str, "digits_comma");
break;
}
/* Config file */
int conf;
char conf_str [FILENAME_MAX];
conf = data_cast->conf;
switch (conf) {
case IMG_IFACE_OCR_CONF_PRICE:
sprintf(conf_str, "%s/%s", share_path, "price");
break;
}
/* init OCR */
handle_ocr = TessBaseAPICreate();
TessBaseAPIInit2(handle_ocr, NULL, lang_str,
#ifdef OEM_LSTM_ONLY
OEM_LSTM_ONLY);
#else
OEM_DEFAULT);
#endif
// OEM_TESSERACT_LSTM_COMBINED);
if (conf) {
/* Configure OCR (whitelist chars) */
TessBaseAPIReadConfigFile(handle_ocr, conf_str);
}
/* scan image for text */
TessBaseAPISetImage(handle_ocr, data_cast->img.data,
data_cast->img.width, data_cast->img.height,
data_cast->img.B_per_pix,
data_cast->img.B_per_line);
TessBaseAPIRecognize(handle_ocr, NULL);
char *txt;
txt = TessBaseAPIGetUTF8Text(handle_ocr);
/* Copy text to global variable */
snprintf(img_ocr_text, OCR_TEXT_MAX, "%s", txt);
/* cleanup */
TessDeleteText(txt);
TessBaseAPIEnd(handle_ocr);
TessBaseAPIDelete(handle_ocr);
}
/******************************************************************************
******* end of file **********************************************************
******************************************************************************/
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