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Diffstat (limited to 'leptonica/prog/convertsegfilestops.c')
| -rw-r--r-- | leptonica/prog/convertsegfilestops.c | 137 |
1 files changed, 137 insertions, 0 deletions
diff --git a/leptonica/prog/convertsegfilestops.c b/leptonica/prog/convertsegfilestops.c new file mode 100644 index 00000000..da74d425 --- /dev/null +++ b/leptonica/prog/convertsegfilestops.c @@ -0,0 +1,137 @@ +/*====================================================================* + - Copyright (C) 2001 Leptonica. All rights reserved. + - + - Redistribution and use in source and binary forms, with or without + - modification, are permitted provided that the following conditions + - are met: + - 1. Redistributions of source code must retain the above copyright + - notice, this list of conditions and the following disclaimer. + - 2. Redistributions in binary form must reproduce the above + - copyright notice, this list of conditions and the following + - disclaimer in the documentation and/or other materials + - provided with the distribution. + - + - THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + - ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + - LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR + - A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL ANY + - CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + - EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + - PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + - PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + - OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING + - NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS + - SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + *====================================================================*/ + +/* + * convertsegfilestops.c + * + * Converts all image files in a 'page' directory, using optional + * corresponding segmentation mask files in a 'mask' directory, + * to a level 2 compressed PostScript file. This is done + * automatically at a resolution that fits to a letter-sized + * (8.5 x 11) inch page. The 'page' and 'mask' files are paired + * by having the same number embedded in their name. + * The 'numpre' and 'numpost' args specify the number of + * characters at the beginning and end of the filename (not + * counting any extension) that are NOT part of the page number. + * For example, if the page numbers are 00000.jpg, 00001.jpg, ... + * then numpre = numpost = 0. + * + * The mask directory must exist, but it does not need to have + * any image mask files. + * + * The pages are taken in lexical order of the filenames. Therefore, + * the embedded numbers should be 0-padded on the left up to + * a fixed number of digits. + * + * PostScript (and pdf) allow regions of the image to be encoded + * differently. Regions can be over-written, with the last writing + * determining the final output. Black "ink" can also be written + * through a mask that is given by a 1 bpp image. + * + * The page images are typically grayscale or color. To take advantage + * of this depth, one typically upscales the text by 2.0. Likewise, + * the images regions, denoted by foreground in the corresponding + * segmentation mask, can be rendered at lower resolution, and + * it is often useful to downscale the image parts by 0.5. + * + * If the mask does not exist, the entire page is interpreted as + * text; it is converted to 1 bpp and written to file with + * ccitt-g4 compression at the requested "textscale" relative + * to the page image. If the mask exists and the foreground + * covers the entire page, the entire page is saved with jpeg + * ("dct") compression at the requested "imagescale". + * If the mask exists and partially covers the page image, the + * page is saved as a mixture of grayscale or rgb dct and 1 bpp g4. + * + * This uses a single global threshold for binarizing the text + * (i.e., non-image) regions of every page. + */ + +#ifdef HAVE_CONFIG_H +#include <config_auto.h> +#endif /* HAVE_CONFIG_H */ + +#include <string.h> +#include "allheaders.h" + +int main(int argc, + char **argv) +{ +char *pagedir, *pagestr, *maskdir, *maskstr, *fileout; +l_int32 threshold, page_numpre, mask_numpre, numpost, maxnum; +l_float32 textscale, imagescale; + + if (argc != 13) { + lept_stderr( + " Syntax: convertsegfilestops pagedir pagestr page_numpre \\ \n" + " maskdir maskstr mask_numpre \\ \n" + " numpost maxnum textscale \\ \n" + " imagescale thresh fileout\n" + " where\n" + " pagedir: Input directory for page image files\n" + " pagestr: Substring for matching; use 'allfiles' to\n" + " convert all files in the page directory\n" + " page_numpre: Number of characters in page name " + "before number\n" + " maskdir: Input directory for mask image files\n" + " maskstr: Substring for matching; use 'allfiles' to\n" + " convert all files in the mask directory\n" + " mask_numpre: Number of characters in mask name " + "before number\n" + " numpost: Number of characters in name after number\n" + " maxnum: Only consider page numbers up to this value\n" + " textscale: Scale of text output relative to pixs\n" + " imagescale: Scale of image output relative to pixs\n" + " thresh: threshold for binarization; typically about\n" + " 180; use 0 for default\n" + " fileout: Output p file\n"); + return 1; + } + pagedir = argv[1]; + pagestr = argv[2]; + page_numpre = atoi(argv[3]); + maskdir = argv[4]; + maskstr = argv[5]; + mask_numpre = atoi(argv[6]); + numpost = atoi(argv[7]); + maxnum = atoi(argv[8]); + textscale = atof(argv[9]); + imagescale = atof(argv[10]); + threshold = atoi(argv[11]); + fileout = argv[12]; + + if (!strcmp(pagestr, "allfiles")) + pagestr = NULL; + if (!strcmp(maskstr, "allfiles")) + maskstr = NULL; + + setLeptDebugOK(1); + return convertSegmentedPagesToPS(pagedir, pagestr, page_numpre, + maskdir, maskstr, mask_numpre, + numpost, maxnum, textscale, + imagescale, threshold, fileout); +} + |