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thrasibulethrasibule
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Diff for: ‎Makefile

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CC = gcc
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CCFLAGS = -O1
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# -DDEBUG
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# -DDICTIONARY
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CODEROBJ = main.o encode.o dictionary.o opt_dict_mixed.o \
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opt_dict_class.o opt_dict_tree.o equi_class.o mark.o match.o \
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symbol_region.o generic_region.o read_write.o decode.o \
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entropy.o mq.o mq_tbl.o huff_tbl.o misc.o
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doc_coder: $(CODEROBJ)
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$(CC) $(CCFLAGS) -o doc_coder $(CODEROBJ) -lm
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clean:
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/bin/rm -f $(CODEROBJ) doc_coder
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# dependencies for header files
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main.o: main.c doc_coder.h entropy.h mq.h Makefile
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$(CC) $(CCFLAGS) -c main.c
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encode.o: encode.c doc_coder.h encode.h dictionary.h entropy.h mq.h Makefile
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$(CC) $(CCFLAGS) -c encode.c
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dictionary.o: dictionary.c doc_coder.h dictionary.h opt_dict.h entropy.h mq.h Makefile
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$(CC) $(CCFLAGS) -c dictionary.c
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opt_dict_mixed.o:opt_dict_mixed.c doc_coder.h dictionary.h opt_dict.h Makefile
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$(CC) $(CCFLAGS) -c opt_dict_mixed.c
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opt_dict_tree.o:opt_dict_tree.c doc_coder.h dictionary.h opt_dict.h Makefile
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$(CC) $(CCFLAGS) -c opt_dict_tree.c
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opt_dict_class.o:opt_dict_class.c doc_coder.h dictionary.h opt_dict.h Makefile
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$(CC) $(CCFLAGS) -c opt_dict_class.c
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equi_class.o: equi_class.c doc_coder.h dictionary.h opt_dict.h Makefile
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$(CC) $(CCFLAGS) -c equi_class.c
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symbol_region.o:symbol_region.c doc_coder.h dictionary.h entropy.h mq.h Makefile
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$(CC) $(CCFLAGS) -c symbol_region.c
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generic_region.o:generic_region.c doc_coder.h dictionary.h entropy.h mq.h Makefile
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$(CC) $(CCFLAGS) -c generic_region.c
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mark.o: mark.c doc_coder.h mark.h Makefile
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$(CC) $(CCFLAGS) -c mark.c
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match.o: match.c doc_coder.h dictionary.h Makefile
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$(CC) $(CCFLAGS) -c match.c
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entropy.o: entropy.c doc_coder.h entropy.h dictionary.h Makefile
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$(CC) $(CCFLAGS) -c entropy.c
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mq.o: mq.c doc_coder.h entropy.h mq.h Makefile
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$(CC) $(CCFLAGS) -c mq.c
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mq_tbl.o: mq_tbl.c Makefile
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$(CC) $(CCFLAGS) -c mq_tbl.c
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huff_tbl.o: huff_tbl.c entropy.h Makefile
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$(CC) $(CCFLAGS) -c huff_tbl.c
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decode.o: decode.c doc_coder.h Makefile
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$(CC) $(CCFLAGS) -c decode.c
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read_write.o: read_write.c dictionary.h doc_coder.h Makefile
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$(CC) $(CCFLAGS) -c read_write.c
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misc.o: misc.c doc_coder.h Makefile
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$(CC) $(CCFLAGS) -c misc.c
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Diff for: ‎README

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JBIG2 encoder by Yan Ye and Pamela Cosman imported from
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http://www.code.ucsd.edu/cosman/jb2.zip
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It can only convert pbm images. By default the images to be converted have to
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be present in ../data, so make sure the directory exists, and the image are
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there. Contrary to what -help says, it doesn't take a second argument.
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For instance, if you want to convert the test.pbm image present in the test
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directory, you can do:
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./doc_coder -p ./test test
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This will generate a test.jb2 file.
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Diff for: ‎cut.c

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/* Copyright 2004 The Regents of the University of California */
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/* All Rights Reserved */
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/* Permission to copy, modify and distribute any part of this JBIG2 codec for */
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/* educational, research and non-profit purposes, without fee, and without a */
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/* written agreement is hereby granted, provided that the above copyright */
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/* notice, this paragraph and the following three paragraphs appear in all */
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/* copies. */
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/* Those desiring to incorporate this JBIG2 codec into commercial products */
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/* or use for commercial purposes should contact the Technology Transfer */
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/* Office, University of California, San Diego, 9500 Gilman Drive, Mail Code */
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/* 0910, La Jolla, CA 92093-0910, Ph: (858) 534-5815, FAX: (858) 534-7345, */
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/* E-MAIL:[email protected]. */
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/* IN NO EVENT SHALL THE UNIVERSITY OF CALIFORNIA BE LIABLE TO ANY PARTY FOR */
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/* DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES, INCLUDING */
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/* LOST PROFITS, ARISING OUT OF THE USE OF THIS JBIG2 CODEC, EVEN IF THE */
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/* UNIVERSITY OF CALIFORNIA HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */
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/* THE JBIG2 CODEC PROVIDED HEREIN IS ON AN "AS IS" BASIS, AND THE */
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/* UNIVERSITY OF CALIFORNIA HAS NO OBLIGATION TO PROVIDE MAINTENANCE, SUPPORT, */
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/* UPDATES, ENHANCEMENTS, OR MODIFICATIONS. THE UNIVERSITY OF CALIFORNIA MAKES */
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/* NO REPRESENTATIONS AND EXTENDS NO WARRANTIES OF ANY KIND, EITHER IMPLIED OR */
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/* EXPRESS, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF */
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/* MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, OR THAT THE USE OF THE */
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/* JBIG2 CODEC WILL NOT INFRINGE ANY PATENT, TRADEMARK OR OTHER RIGHTS. */
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#define PATH ""
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typedef struct {
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int width, height;
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unsigned char *content;
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} BinImage;
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typedef struct {
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int x, y;
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} PixelCoord;
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typedef struct{
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PixelCoord ul;
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int width, height;
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} Rectangle;
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void error(char *);
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void read_pbm_image(BinImage *, char *);
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void cut_rectangle(BinImage *, BinImage *, Rectangle *);
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void write_pbm_image(BinImage *, char *);
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void main(int argc, char **argv)
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{
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char ofn[100], nfn[100];
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BinImage bim, rim;
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Rectangle rect;
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if(argc != 2)
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error("main: wrong command line architecture");
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/* read color image */
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strcpy(ofn, argv[1]);
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read_pbm_image(&bim, ofn);
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printf("input upper-left corner of rectangle:");
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scanf("%d %d", &rect.ul.x, &rect.ul.y);
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printf("input size of rectangle:");
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scanf("%d %d", &rect.width, &rect.height);
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if(rect.ul.x + rect.width > bim.width) {
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printf("Rectangle specified is out of range horizontally, "
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"will shrink its width\n");
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rect.width = bim.width-rect.ul.x;
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}
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if(rect.ul.y + rect.height > bim.height) {
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printf("Rectangle specified is out of range vertically, "
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"will shrink its height\n");
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rect.height = bim.height-rect.ul.y;
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}
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/* binarize manually */
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cut_rectangle(&bim, &rim, &rect);
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/* write binarized image */
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printf("input PBM file name:");
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scanf("%s", nfn);
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if(strcmp(nfn+strlen(nfn)-4, ".pbm"))
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strcat(nfn, ".pbm");
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write_pbm_image(&rim, nfn);
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}
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void read_pbm_image(BinImage *im, char *fn)
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{
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FILE *fp;
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char line[2000];
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register int x, y;
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int buffer, bits_to_go;
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int bytes_per_line;
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unsigned char *ptr;
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strcpy(line, PATH);
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strcat(line, fn);
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fp = fopen(line, "r");
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if(!fp) error("read_pbm_image: Cannot open input PBM image file!");
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/* PBM file identifier */
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fgets(line, 2000, fp);
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if(strncmp(line, "P4", strlen("P4")))
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error("read_pbm_image: Input file is not in PBM format\n");
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/* skip possible comments */
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fgets(line, 2000, fp);
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while(line[0] == '#' || line[0] == '\n')
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fgets(line, 2000, fp);
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/* image size */
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sscanf(line, "%d %d", &im->width, &im->height);
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/* skip possible comments */
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fgets(line, 2000, fp);
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while(line[0] == '#' || line[0] == '\n')
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fgets(line, 2000, fp);
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/* read data */
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im->content = (unsigned char *)
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malloc(sizeof(unsigned char)*im->width*im->height);
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if(!im->content) error("read_pbm_image: Cannot allocate memory");
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memset(im->content, 0, im->width*im->height);
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bytes_per_line = im->width >> 3;
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if(im->width % 8) bytes_per_line++;
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fseek(fp, -bytes_per_line*im->height, SEEK_END);
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bits_to_go = 0; ptr = im->content;
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for(y = 0; y < im->height; y++) {
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for(x = 0; x < im->width; x++) {
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if(!bits_to_go) {
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buffer = fgetc(fp);
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bits_to_go = 8;
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}
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if(buffer & 0x80) ptr[x] = 1;
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buffer <<= 1; bits_to_go--;
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}
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bits_to_go = 0; ptr += im->width;
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}
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}
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void cut_rectangle(BinImage *oim, BinImage *nim, Rectangle *rect)
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{
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register int y;
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unsigned char *optr, *nptr;
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nim->width = rect->width; nim->height = rect->height;
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nim->content = (unsigned char *)
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malloc(sizeof(unsigned char)*nim->width*nim->height);
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if(!nim->content)
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error("cut_rectangle: Cannot allocate memory");
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optr = oim->content + oim->width*rect->ul.y+rect->ul.x;
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nptr = nim->content;
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for(y = 0; y < rect->height; y++) {
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memcpy(nptr, optr, rect->width);
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optr += oim->width;
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nptr += nim->width;
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}
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}
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void write_pbm_image(BinImage *bim, char *fn)
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{
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FILE *fp;
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char line[1000];
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register int x, y;
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int buffer;
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int bits_to_go;
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unsigned char *bptr;
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strcpy(line, PATH);
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strcat(line, fn);
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fp = fopen(line, "w");
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if(!fp) error("write_pbm_image: Cannot open PBM image");
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/* PBM image identifier */
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fprintf(fp, "P4\n");
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/* image size */
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fprintf(fp, "%d %d\n", bim->width, bim->height);
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/* image content */
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bptr = bim->content;
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for(y = 0; y < bim->height; y++) {
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bits_to_go = 8; buffer = 0;
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for(x = 0; x < bim->width; x++) {
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if(bptr[x]) buffer = (buffer << 1) | 1;
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else buffer <<= 1;
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bits_to_go--;
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if(!bits_to_go) {
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fputc(buffer, fp);
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bits_to_go = 8; buffer = 0;
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}
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}
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if(bits_to_go != 8) {
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buffer <<= bits_to_go;
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fputc(buffer, fp);
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}
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bptr += bim->width;
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}
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fclose(fp);
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}
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void error(char *msg)
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{
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printf("%s\n", msg);
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exit(-1);
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}

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