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1.1 ! root 1: .TH OCR 1 cetus,hydra,coma ! 2: .CT 1 graphics ! 3: .SH NAME ! 4: ocr \- optical character recognition ! 5: .SH SYNOPSIS ! 6: .B ocr ! 7: [ ! 8: .I option ... ! 9: ] ! 10: [ ! 11: .I file ! 12: ] ! 13: .SH DESCRIPTION ! 14: .I Ocr ! 15: reads a black-and-white image of a page from ! 16: .IR file , ! 17: and writes ASCII to the standard output. ! 18: If no ! 19: .I file ! 20: is specified, it reads from the standard input. ! 21: .PP ! 22: The input is a ! 23: .IR picfile (5) ! 24: image of one column of machine-printed text, normally ! 25: scanned in by ! 26: .IR cscan (1). ! 27: Fonts, sizes, and line-spacings may vary within the column, ! 28: but each line should have a constant text size and baseline. ! 29: Lines should be parallel and roughly horizontal. ! 30: .PP ! 31: In the output, white space approximates the original page layout. ! 32: Words that ! 33: .IR spell (1) ! 34: are preferred, and hyphenations across lines are recombined. ! 35: .PP ! 36: The options are: ! 37: .nr xx \w'\fL-pn,m\ \ ' ! 38: .TP \n(xxu ! 39: .BI -a s ! 40: The alphabet is the union of symbol sets selected by characters in string ! 41: .IR s , ! 42: from among: ! 43: .RS ! 44: .PD ! 45: .nr yy \w'\fLA\ \ ' ! 46: .TP \n(yyu ! 47: .B A ! 48: ABCDEFGHIJKLMNOPQRSTUVWXYZ ! 49: .PD0 ! 50: .TP ! 51: .B a ! 52: abcdefghijklmnopqrstuvwxyz ! 53: .PD0 ! 54: .TP ! 55: .B 0 ! 56: 0123456789 ! 57: .PD0 ! 58: .TP ! 59: .B . ! 60: .ie t \&.\^,\|-\^:\^;\|*\^'\|\^"\|?\^!\|/\|&\|$\^(\^)\^[\|\^]\|#\|@\|% \0\0\0\0\0\0\0\0\0\0\0 \kz(basic punctuation) ! 61: .el \&.\^,\|-\^:\^;\|*\^'\|\^"\|?\^!\|/\|&\|$\^(\^)\^[\|\^]\|#\|@\|% \0\0\0\0\0\0\0 \kz(basic punctuation) ! 62: .ig ! 63: should include ` /(em + ??? ! 64: shouldn't include []#@% ??? ! 65: .. ! 66: .PD0 ! 67: .TP ! 68: .B ^ ! 69: ^\|\f(CW~\fR\^`\|\^\\\||\|\^{\|}\|_ \h'|\nzu'(extended punct'n) ! 70: .ig ! 71: should include []#@% ??? ! 72: shouldn't include ` ??? ! 73: .. ! 74: .PD0 ! 75: .TP ! 76: .B + ! 77: +\^\-\^*\|/\|<\^>\^=\^.\^E\|e\|[\|] \h'|\nzu'(numerical punct'n) ! 78: .PD0 ! 79: .TP ! 80: .B s ! 81: .ie t \(sc\^\(dg\^\(dd\^\(ct\|\(bu\|\(co\|\(rg\|\(de\^\(fm\^\(en\|\^\(mi\|\(em \h'|\nzu'(selected non-ASCII) ! 82: .el \\(sc\\(dg\\(dd\\(ct\\(bu\\(co ... \h'|\nzu'(selected non-ASCII) ! 83: .PD0 ! 84: .TP ! 85: .B l ! 86: .ie t \(fi\|\(fl\|f\h'-.1m'f\|f\h'-.1m'\(fi\|f\h'-.1m'\(fl\|\N'114'\|\N'115'\|\N'105'\|\N'106' \h'|\nzu'(ligatures and digraphs) ! 87: .el fi fl ff ffi ffl ae oe ... \h'|\nzu'(ligatures, digraphs) ! 88: .PD0 ! 89: .TP ! 90: .B g ! 91: .ie t \(*a\(*b\(*g\(*d\(*e\(*z\(*y\(*h\(*i\(*k\(*l\(*m\(*n\(*c\(*o\(*p\(*r\(*s\(*t\(*u\(*f\(*x\(*q\(*w \h'|\nzu'(Greek lower case) ! 92: .el \\(*a\\(*b\\(*g\\(*d\\(*e\\(*z ... \h'|\nzu'(Greek lower case) ! 93: .PD0 ! 94: .TP ! 95: .B G ! 96: .ie t AB\(*G\(*DEZH\(*HIK\(*LMN\(*CO\(*PP\(*STY\(*FX\(*Q\(*W \h'|\nzu'(Greek upper case) ! 97: .el AB\\(*G\\(*DEZ ... \h'|\nzu'(Greek upper case) ! 98: .PD ! 99: .PP ! 100: The default is ! 101: .BR -aAa0.+^ , ! 102: the full printable-ASCII set, which may be abbreviated as ! 103: .BR -ap . ! 104: Thus, ! 105: .B -apslgG ! 106: selects all of the above. ! 107: .RE ! 108: .PD ! 109: .TP \n(xxu ! 110: .B -c ! 111: Find columns in complex nested layouts using greedy white covers algorithm. ! 112: .TP ! 113: .BI -m l[,r] ! 114: Trim the left and right margins of the image by ! 115: .I l ! 116: and ! 117: .I r ! 118: inches, respectively, before looking for columns. ! 119: If ! 120: .I r ! 121: is omitted, it is assumed to equal ! 122: .IR l. ! 123: .TP ! 124: .BI -n n ! 125: Find the ! 126: .I n ! 127: largest columns by analysis of a single vertical projection. ! 128: Each column should be compactly-printed ! 129: and separated from the others by at least 2 ems of horizontal white space. ! 130: .TP ! 131: .BI -p n,m ! 132: Point sizes lie in the range [ ! 133: .I n, m ! 134: ]; other sizes are discarded. ! 135: The default is ! 136: .BR -p6,24 . ! 137: .TP ! 138: .B -s ! 139: Defeat spelling check (but continue to favor numeric strings and good punctuation). ! 140: .TP ! 141: .B -t ! 142: Write ! 143: .IR troff (1) ! 144: format. ! 145: Each column is shown on a separate page, lines at their original height, ! 146: words at their original horizontal location, and ! 147: characters roughly original size in Times roman. ! 148: Hyphenated words are not recombined. ! 149: .TP ! 150: .B -u ! 151: Unspellable words are prefixed with `?' or, if ! 152: .B -t ! 153: is specified, printed boldface. ! 154: .TP ! 155: .BI -w w ! 156: Find the largest column of width ! 157: .I w ! 158: inches, within a single vertical projection. ! 159: .SS Fonts ! 160: Trained on over 100 Latin-alphabet book fonts in various italic, bold, etc styles. ! 161: Only one font of Greek, without diacriticals. ! 162: Also Swedish and Tibetan, on request. ! 163: .SH SEE ALSO ! 164: .IR bcp (1), ! 165: .IR cscan (1), ! 166: .IR font (6), ! 167: .IR picfile (5), ! 168: .IR spell (1), ! 169: .IR troff (1) ! 170: .SH BUGS ! 171: For best results, use images of high-contrast, cleanly-printed original ! 172: documents digitized at a resolution of 400 pixels/inch or higher. ! 173: It may help to restrict the alphabet and sizes to what's there. ! 174: .ig ! 175: 8.7 CPU minutes on pipe to read this page, September 1989. ! 176: ..
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