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#include <stdio.h>
#include <string.h>
#include <errno.h>
#include <unistd.h>
#include <stdlib.h>
#include <fcntl.h>
#include <sys/mman.h>
#include <sys/types.h>
#include <sys/stat.h>
#include "baseapi.h"
#include "varable.h"
#include "tessvars.h"
#define FAILIF(cond, msg...) do { \
if (cond) { \
fprintf(stderr, "%s(%d): ", __FILE__, __LINE__); \
fprintf(stderr, ##msg); \
exit(1); \
} \
} while(0)
// This is to make the ratings file parser happy.
BOOL_VAR (tessedit_write_images, FALSE,
"Capture the image from the IPE");
static void ocr(tesseract::TessBaseAPI *api,
const char *lang,
const char *tessdata,
const char *ratings,
void *buffer,
int x, int y, int bpp,
const char *outfile)
{
printf("tessdata %s\n", tessdata);
printf("lang %s\n", lang);
FAILIF(api->Init(tessdata, lang), "could not initialize tesseract\n");
if (ratings) {
printf("ratings %s\n", ratings);
FAILIF(false == api->ReadConfigFile(ratings),
"could not read config file\n");
}
printf("set image\n");
api->SetImage((const unsigned char *)buffer, x, y, bpp, bpp*x);
printf("set rectangle to cover entire image\n");
api->SetRectangle(2, 2, x-2, y-2);
printf("set page seg mode to single character\n");
api->SetPageSegMode(tesseract::PSM_AUTO);
printf("recognize\n");
char * text = api->GetUTF8Text();
if (tessedit_write_images) {
page_image.write("tessinput.tif");
}
FAILIF(text == NULL, "didn't recognize\n");
printf("write to output %s\n", outfile);
FILE* fp = fopen(outfile, "w");
if (fp != NULL) {
fwrite(text, strlen(text), 1, fp);
fclose(fp);
}
delete [] text;
int mean_confidence = api->MeanTextConf();
printf("mean confidence: %d\n", mean_confidence);
int* confs = api->AllWordConfidences();
int len, *trav;
for (len = 0, trav = confs; *trav != -1; trav++, len++)
printf("confidence %d: %d\n", len, *trav);
free(confs);
printf("clearing api\n");
api->Clear();
printf("clearing adaptive classifier\n");
api->ClearAdaptiveClassifier();
api->End();
}
int main(int argc, char **argv) {
const char *tessdata, *infile, *outfile, *lang, *ratings;
void *buffer;
struct stat s;
int x, y, bpp, ifd;
FAILIF(argc < 8 || argc > 9,
"tesstest infile xres yres bpp outfile lang tessdata [ratings]\n");
infile = argv[1];
FAILIF(sscanf(argv[2], "%d", &x) != 1, "could not parse x!\n");
FAILIF(sscanf(argv[3], "%d", &y) != 1, "could not parse y!\n");
FAILIF(sscanf(argv[4], "%d", &bpp) != 1, "could not parse bpp!\n");
outfile = argv[5];
lang = argv[6];
tessdata = argv[7];
ratings = argv[8];
printf("input file %s\n", infile);
ifd = open(infile, O_RDONLY);
FAILIF(ifd < 0, "open(%s): %s\n", infile, strerror(errno));
FAILIF(fstat(ifd, &s) < 0, "fstat(%d): %s\n", ifd, strerror(errno));
printf("file size %lld\n", s.st_size);
buffer = mmap(NULL, s.st_size, PROT_READ, MAP_PRIVATE, ifd, 0);
FAILIF(buffer == MAP_FAILED, "mmap(): %s\n", strerror(errno));
printf("infile mmapped at %p\n", buffer);
FAILIF(!tessdata, "You must specify a path for tessdata.\n");
printf("set image x=%d, y=%d bpp=%d\n", x, y, bpp);
FAILIF(!bpp || bpp == 2 || bpp > 4,
"Invalid value %d of bpp\n", bpp);
printf("\n\tpass 1\n\n");
tesseract::TessBaseAPI *api = new tesseract::TessBaseAPI();
ocr(api,
lang, tessdata,
ratings,
buffer, x, y, bpp,
outfile);
delete api;
printf("\n\tpass 2\n\n");
api = new tesseract::TessBaseAPI();
ocr(api,
lang, tessdata,
ratings,
buffer, x, y, bpp,
outfile);
delete api;
//delete [] text;
return 0;
}
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