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813367fff4
tesseract/api/tesseractmain.cpp
theraysmith 813367fff4 Fixed issue 279 
git-svn-id: https://tesseract-ocr.googlecode.com/svn/trunk@348 d0cd1f9f-072b-0410-8dd7-cf729c803f20
2010-05-20 17:00:27 +00:00

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/**********************************************************************
* File: tessedit.cpp (Formerly tessedit.c)
* Description: Main program for merge of tess and editor.
* Author: Ray Smith
* Created: Tue Jan 07 15:21:46 GMT 1992
*
* (C) Copyright 1992, Hewlett-Packard Ltd.
** Licensed under the Apache License, Version 2.0 (the "License");
** you may not use this file except in compliance with the License.
** You may obtain a copy of the License at
** http://www.apache.org/licenses/LICENSE-2.0
** Unless required by applicable law or agreed to in writing, software
** distributed under the License is distributed on an "AS IS" BASIS,
** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
** See the License for the specific language governing permissions and
** limitations under the License.
*
**********************************************************************/
#include "mfcpch.h"
#include <ctype.h>
#include "applybox.h"
#include "control.h"
#include "tessvars.h"
#include "tessedit.h"
#include "baseapi.h"
#include "thresholder.h"
#include "pageres.h"
#include "imgs.h"
#include "varabled.h"
#include "tprintf.h"
#include "tesseractmain.h"
#include "stderr.h"
#include "notdll.h"
#include "mainblk.h"
#include "output.h"
#include "globals.h"
#include "helpers.h"
#include "blread.h"
#include "tfacep.h"
#include "callnet.h"
// Include automatically generated configuration file if running autoconf
#ifdef HAVE_CONFIG_H
#include "config_auto.h"
#endif
#ifdef HAVE_LIBTIFF
#include "tiffio.h"
#endif
#ifdef HAVE_LIBLEPT
#include "allheaders.h"
#else
class Pix;
#endif
#ifdef _TIFFIO_
void read_tiff_image(TIFF* tif, IMAGE* image);
#endif
#define VARDIR "configs/" /*variables files */
//config under api
#define API_CONFIG "configs/api_config"
#define EXTERN
BOOL_VAR(tessedit_create_boxfile, FALSE, "Output text with boxes");
BOOL_VAR(tessedit_create_hocr, FALSE, "Output HTML with hOCR markup");
BOOL_VAR(tessedit_read_image, TRUE, "Ensure the image is read");
INT_VAR(tessedit_serial_unlv, 0,
"0->Whole page, 1->serial no adapt, 2->serial with adapt");
INT_VAR(tessedit_page_number, -1,
"-1 -> All pages, else specifc page to process");
BOOL_VAR(tessedit_write_images, FALSE, "Capture the image from the IPE");
BOOL_VAR(tessedit_debug_to_screen, FALSE, "Dont use debug file");
const int kMaxIntSize = 22;
char szAppName[] = "Tessedit"; //app name
// Recognize a single page, given by the (const) image, and output the text,
// as controlled by global flag variables into the output text_out STRING:
// tessedit_serial_unlv is the top-level control, and provides 3 ways of
// treating the UNLV zones with the adaptive classifier:
// case 0: if there is a unlv zone file present, use it to segment the page
// and process the zones in parallel (pass 1 on all, then pass2 on all),
// otherwise, treat the whole page as a single zone.
// Independently of the existence of the unlv zone file:
// if tessedit_create_boxfile, output text in ".box" training file format, with
// one recognizable unit (as UTF8 characters) per line and its bounding box
// coded in UTF8(equivalent to ascii) for generating training data by hand.
// else if tessedit_write_unlv, output text in Latin-1, with a few special
// hacks for the UNLV test environment. Only works for latin!
// else (default mode) write plain text in UTF-8.
// case 1:(tessedit_serial_unlv) Read a unlv zone file (and fail if not found)
// and treat each zone as an independent "page", including resetting the
// adaptive classifier between zones.
// case 2: Read a unlv zone file (fail if not found) and treat each zone as
// a page of a document, i.e. DON'T reset the adaptive classifier between
// zones.
// In case 1 and 2, the UNLV zone file name is derived from input_file, by
// replacing the last 4 characters with ".uzn". In case 0, the unlv zone
// file name is derived from the 2nd parameter to InitWithLanguage, and
// the value of input_file is ignored - ugly, but true - a consequence of
// the way that unlv zone file reading takes the place of a page layout
// analyzer.
void TesseractImage(const char* input_file, IMAGE* image, Pix* pix, int page_id,
tesseract::TessBaseAPI* api, STRING* text_out) {
api->SetInputName(input_file);
#ifdef HAVE_LIBLEPT
if (pix != NULL) {
api->SetImage(pix);
} else {
#endif
int bytes_per_line = check_legal_image_size(image->get_xsize(),
image->get_ysize(),
image->get_bpp());
api->SetImage(image->get_buffer(), image->get_xsize(), image->get_ysize(),
image->get_bpp() / 8, bytes_per_line);
#ifdef HAVE_LIBLEPT
}
#endif
if (tessedit_serial_unlv == 0) {
char* text;
if (tessedit_create_boxfile)
text = api->GetBoxText();
else if (tessedit_write_unlv)
text = api->GetUNLVText();
else if (tessedit_create_hocr)
text = api->GetHOCRText(page_id);
else
text = api->GetUTF8Text();
*text_out += text;
delete [] text;
} else {
BLOCK_LIST blocks;
STRING filename = input_file;
const char* lastdot = strrchr(filename.string(), '.');
if (lastdot != NULL) {
filename[lastdot - filename.string()] = '\0';
}
if (!read_unlv_file(filename, image->get_xsize(), image->get_ysize(),
&blocks)) {
fprintf(stderr, "Error: Must have a unlv zone file %s to read!\n",
filename.string());
return;
}
BLOCK_IT b_it = &blocks;
for (b_it.mark_cycle_pt(); !b_it.cycled_list(); b_it.forward()) {
BLOCK* block = b_it.data();
TBOX box = block->bounding_box();
api->SetRectangle(box.left(), image->get_ysize() - box.top(),
box.width(), box.height());
char* text = api->GetUNLVText();
*text_out += text;
delete [] text;
if (tessedit_serial_unlv == 1)
api->ClearAdaptiveClassifier();
}
}
if (tessedit_write_images) {
page_image.write("tessinput.tif");
}
}
/**********************************************************************
* main()
*
**********************************************************************/
int main(int argc, char **argv) {
STRING outfile; //output file
// Detect incorrectly placed -l option.
for (int arg = 0; arg < argc; ++arg) {
if (arg != 3 && strcmp(argv[arg], "-l") == 0) {
fprintf(stderr, "Error: -l must be arg3, not %d\n", arg);
argc = 0;
}
}
if (argc < 3) {
fprintf(stderr, "Usage:%s imagename outputbase [-l lang]"
" [configfile [[+|-]varfile]...]\n"
#if !defined(HAVE_LIBLEPT) && !defined(_TIFFIO_)
"Warning - no liblept or libtiff - cannot read compressed"
" tiff files.\n"
#endif
, argv[0]);
exit(1);
}
// Find the required language.
const char* lang = "eng";
int arg = 3;
if (argc >= 5 && strcmp(argv[3], "-l") == 0) {
lang = argv[4];
arg = 5;
}
tesseract::TessBaseAPI api;
api.SetOutputName(argv[2]);
api.Init(argv[0], lang, &(argv[arg]), argc-arg, false);
api.SetPageSegMode(tesseract::PSM_AUTO);
tprintf ("Tesseract Open Source OCR Engine %s\n",
#if defined(HAVE_LIBLEPT)
"with Leptonica");
#elif defined(_TIFFIO_)
"with LibTiff");
#else
"");
#endif
IMAGE image;
STRING text_out;
int page_number = tessedit_page_number;
if (page_number < 0)
page_number = 0;
FILE* fp = fopen(argv[1], "rb");
if (fp == NULL) {
tprintf("Image file %s cannot be opened!\n", argv[1]);
exit(1);
}
#ifdef HAVE_LIBLEPT
int page = page_number;
bool is_tiff = fileFormatIsTiff(fp);
fclose(fp);
if (is_tiff) {
for (; (pix = pixReadTiff(argv[1], page)) != NULL; ++page) {
if (page > 0)
tprintf("Page %d\n", page);
char page_str[kMaxIntSize];
snprintf(page_str, kMaxIntSize - 1, "%d", page);
api.SetVariable("applybox_page", page_str);
// Run tesseract on the page!
TesseractImage(argv[1], pix, page + 1, &api, &text_out);
pixDestroy(&pix);
if (tessedit_page_number >= 0) {
break;
}
}
} else {
// The file is not a tiff file, so use the general pixRead function.
// If the image fails to read, try it as a list of filenames.
PIX* pix = pixRead(argv[1]);
if (pix == NULL) {
FILE* fp = fopen(argv[1], "r");
if (fp == NULL) {
tprintf("File %s cannot be opened!\n", argv[1]);
exit(1);
}
char filename[MAX_PATH];
while (fgets(filename, sizeof(filename), fp) != NULL) {
chomp_string(filename);
pix = pixRead(filename);
if (pix == NULL) {
tprintf("Image file %s cannot be read!\n", filename);
exit(1);
}
tprintf("Page %d : %s\n", page, filename);
TesseractImage(filename, NULL, pix, page + 1, &api, &text_out);
pixDestroy(&pix);
++page;
}
fclose(fp);
} else {
TesseractImage(argv[1], NULL, pix, 1, &api, &text_out);
pixDestroy(&pix);
}
}
#else
#ifdef _TIFFIO_
int len = strlen(argv[1]);
char* ext = new char[5];
for (int i=4; i>=0; i--)
ext[4-i] = (char) tolower((int) argv[1][len - i]);
if (len > 3 && (strcmp("tif", ext + 1) == 0 || strcmp("tiff", ext) == 0)) {
// Use libtiff to read a tif file so multi-page can be handled.
// The page number so the tiff file can be closed and reopened.
TIFF* archive = NULL;
do {
// Since libtiff keeps all read images in memory we have to close the
// file and reopen it for every page, and seek to the appropriate page.
if (archive != NULL)
TIFFClose(archive);
archive = TIFFOpen(argv[1], "r");
if (archive == NULL) {
tprintf("Read of file %s failed\n", argv[1]);
exit(1);
}
if (page_number > 0)
tprintf("Page %d\n", page_number);
// Seek to the appropriate page.
for (int i = 0; i < page_number; ++i) {
TIFFReadDirectory(archive);
}
char page_str[kMaxIntSize];
snprintf(page_str, kMaxIntSize - 1, "%d", page_number);
api.SetVariable("applybox_page", page_str);
++page_number;
// Read the current page into the Tesseract image.
IMAGE image;
read_tiff_image(archive, &image);
// Run tesseract on the page!
TesseractImage(argv[1], &image, NULL, page_number, &api, &text_out);
// Do this while there are more pages in the tiff file.
} while (TIFFReadDirectory(archive) &&
(page_number <= tessedit_page_number || tessedit_page_number < 0));
TIFFClose(archive);
} else {
#endif
// Using built-in image library to read bmp, or tiff without libtiff.
if (image.read_header(argv[1]) < 0) {
tprintf("Read of file %s failed.\n", argv[1]);
exit(1);
}
if (image.read(image.get_ysize ()) < 0)
MEMORY_OUT.error(argv[0], EXIT, "Read of image %s", argv[1]);
invert_image(&image);
TesseractImage(argv[1], &image, NULL, 1, &api, &text_out);
#ifdef _TIFFIO_
}
#endif
#endif // HAVE_LIBLEPT
bool output_hocr = tessedit_create_hocr;
outfile = argv[2];
outfile += output_hocr ? ".html" : ".txt";
fp = fopen(outfile.string(), "w");
if (fp == NULL) {
tprintf("Cannot create output file %s\n", outfile.string());
exit(1);
}
if (output_hocr) {
const char html_header[] =
"<!DOCTYPE html PUBLIC \"-//W3C//DTD HTML 4.01 Transitional//EN\""
" \"http://www.w3.org/TR/html4/loose.dtd\">\n"
"<html>\n<head>\n<title></title>\n"
"<meta http-equiv=\"Content-Type\" content=\"text/html;"
"charset=utf-8\" >\n<meta name='ocr-system' content='tesseract'>\n"
"</head>\n<body>\n";
fprintf(fp, "%s", html_header);
}
fwrite(text_out.string(), 1, text_out.length(), fp);
if (output_hocr)
fprintf(fp, "</body>\n</html>\n");
fclose(fp);
return 0; //Normal exit
}
#ifdef __MSW32__
int initialized = 0;
/**********************************************************************
* WinMain
*
* Main function for a windows program.
**********************************************************************/
int WINAPI WinMain( //main for windows //command line
HINSTANCE hInstance,
HINSTANCE hPrevInstance,
LPSTR lpszCmdLine,
int nCmdShow) {
WNDCLASS wc;
HWND hwnd;
MSG msg;
char **argv;
char *argsin[2];
int argc;
int exit_code;
wc.style = CS_NOCLOSE | CS_OWNDC;
wc.lpfnWndProc = (WNDPROC) WndProc;
wc.cbClsExtra = 0;
wc.cbWndExtra = 0;
wc.hInstance = hInstance;
wc.hIcon = NULL; //LoadIcon (NULL, IDI_APPLICATION);
wc.hCursor = NULL; //LoadCursor (NULL, IDC_ARROW);
wc.hbrBackground = (HBRUSH) (COLOR_WINDOW + 1);
wc.lpszMenuName = NULL;
wc.lpszClassName = szAppName;
RegisterClass(&wc);
hwnd = CreateWindow (szAppName, szAppName,
WS_OVERLAPPEDWINDOW | WS_DISABLED,
CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT,
CW_USEDEFAULT, HWND_DESKTOP, NULL, hInstance, NULL);
argsin[0] = strdup (szAppName);
argsin[1] = strdup (lpszCmdLine);
/*allocate memory for the args. There can never be more than half*/
/*the total number of characters in the arguments.*/
argv =
(char **) malloc (((strlen (argsin[0]) + strlen (argsin[1])) / 2 + 1) *
sizeof (char *));
/*now construct argv as it should be for C.*/
argc = parse_args (2, argsin, argv);
// ShowWindow (hwnd, nCmdShow);
// UpdateWindow (hwnd);
if (initialized) {
exit_code = main (argc, argv);
free (argsin[0]);
free (argsin[1]);
free(argv);
return exit_code;
}
while (GetMessage (&msg, NULL, 0, 0)) {
TranslateMessage(&msg);
DispatchMessage(&msg);
if (initialized) {
exit_code = main (argc, argv);
break;
}
else
exit_code = msg.wParam;
}
free (argsin[0]);
free (argsin[1]);
free(argv);
return exit_code;
}
/**********************************************************************
* WndProc
*
* Function to respond to messages.
**********************************************************************/
LONG WINAPI WndProc( //message handler
HWND hwnd, //window with message
UINT msg, //message typ
WPARAM wParam,
LPARAM lParam) {
HDC hdc;
if (msg == WM_CREATE) {
//
// Create a rendering context.
//
hdc = GetDC (hwnd);
ReleaseDC(hwnd, hdc);
initialized = 1;
return 0;
}
return DefWindowProc (hwnd, msg, wParam, lParam);
}
/**********************************************************************
* parse_args
*
* Turn a list of args into a new list of args with each separate
* whitespace spaced string being an arg.
**********************************************************************/
int
parse_args ( /*refine arg list */
int argc, /*no of input args */
char *argv[], /*input args */
char *arglist[] /*output args */
) {
int argcount; /*converted argc */
char *testchar; /*char in option string */
int arg; /*current argument */
argcount = 0; /*no of options */
for (arg = 0; arg < argc; arg++) {
testchar = argv[arg]; /*start of arg */
do {
while (*testchar
&& (*testchar == ' ' || *testchar == '\n'
|| *testchar == '\t'))
testchar++; /*skip white space */
if (*testchar) {
/*new arg */
arglist[argcount++] = testchar;
/*skip to white space */
for (testchar++; *testchar && *testchar != ' ' && *testchar != '\n' && *testchar != '\t'; testchar++);
if (*testchar)
*testchar++ = '\0'; /*turn to separate args */
}
}
while (*testchar);
}
return argcount; /*new number of args */
}
#endif
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