Re: Converting tesseract box data into 2d grid

Update:BTW, there is an error in your data compared to the image; the R at the start of the middle line has come out as an I.

Inverting the table left as an exercise, as is programmaticly deriving the magic numbers :):

#! perl -slw
use strict;
use Data::Dump qw[ pp ]; $Data::Dump::WIDTH = 200;
use List::Util qw[ min ];

my %pos;
while( <DATA> ) {
    my( $c, $x1, $y1, $x2, $y2 ) = split ' ';
    $pos{ int( $y1 / 12 ) }{ int( $x1 / 10.5 ) } = $c;
}

my $firstY = min( keys %pos );
my @firstXs = sort{ $a <=> $b } keys %{ $pos{ $firstY } };
for my $y ( grep $_ != $firstY, keys %pos ) {
    $pos{ $y }{ $_ } //= ' ' for @firstXs;
}
pp \%pos;

__DATA__
... from the OP
[download]

Output:

C:\test>1114833
{
  1 => { 1 => "T", 4 => "S", 6 => "E", 9 => "C", 11 => "I", 13 => "E",
+ 16 => "N", 18 => "E", 20 => "O", 23 => "T", 25 => "Y", 28 => "U", 30
+ => "E" },
  3 => { 1 => " ", 4 => "I", 6 => "I", 9 => "L", 11 => "V", 13 => "E",
+ 16 => "V", 18 => "N", 20 => "U", 23 => "Y", 25 => "Z", 28 => "L", 30
+ => " " },
  5 => { 1 => " ", 4 => "I", 6 => "O", 9 => "L", 11 => "I", 13 => "E",
+ 16 => "D", 18 => "P", 20 => "B", 23 => "H", 25 => "O", 28 => "S", 30
+ => " " },
  7 => { 1 => " ", 4 => "B", 6 => "I", 9 => "C", 11 => "C", 13 => "Y",
+ 16 => "D", 18 => "I", 20 => "T", 23 => "Z", 25 => "I", 28 => " ", 30
+ => " " },
  9 => { 1 => " ", 4 => " ", 6 => "N", 9 => " ", 11 => "K", 13 => "A",
+ 16 => " ", 18 => " ", 20 => " ", 23 => "L", 25 => " ", 28 => " ", 30
+ => " " },
}
[download]

With the rise and rise of 'Social' network sites: 'Computers are making people easier to use everyday'

Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error.

"Science is about questioning the status quo. Questioning authority". I'm with torvalds on this

In the absence of evidence, opinion is indistinguishable from prejudice. Agile (and TDD) debunked

, 28 =V

Comment on Re: Converting tesseract box data into 2d grid Select or Download Code

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Re^2: Converting tesseract box data into 2d grid by Anonymous Monk on Jan 29, 2015 at 00:47 UTC
Thanks, this looks great! I'm guessing the magic numbers can be found by averaging the dimensions from all the bounding boxes.	[reply]
Re^3: Converting tesseract box data into 2d grid by BrowserUk (Patriarch) on Jan 29, 2015 at 01:27 UTC
'm guessing the magic numbers can be found by averaging the dimensions from all the bounding boxes. Actually no. I tried that; but the average x-dimension comes out at 8.5882352941176470588235294117647; which was no good at all. I'm afraid I cheated a little. The Y dimension was obvious as all the Ys come out as 12. For the X, I inspected the data and guessed at 10, but that put to many extra spaces in: C:\test>1114833 { 1 => { 1 => "T", 4 => "S", 7 => "E", 9 => "C", 11 => "I", 14 => "E", + 16 => "N", 19 => "E", 21 => "O", 24 => "T", 26 => "Y", 29 => "U", 32 + => "E" }, 3 => { 1 => " ", 4 => "I", 6 => "I", 7 => " ", 9 => "L", 11 => " ", +12 => "V", 14 => "E", 16 => " ", 17 => "V", 19 => "N", 21 => "U", 24 +=> "Y", 26 => "Z", 29 => "L", 32 => " " }, 5 => { 1 => " ", 4 => "I", 6 => "O", 7 => " ", 9 => "L", 11 => "I", +14 => "E", 16 => "D", 19 => "P", 21 => " ", 22 => "B", 24 => "H", 26 +=> "O", 29 => "S", 32 => " " }, 7 => { 1 => " ", 4 => "B", 6 => "I", 7 => " ", 9 => "C", 11 => "C", +14 => "Y", 16 => "D", 19 => "I", 21 => "T", 24 => "Z", 26 => "I", 29 +=> " ", 32 => " " }, 9 => { 1 => " ", 4 => " ", 6 => "N", 7 => " ", 9 => " ", 11 => " ", +12 => "K", 14 => "A", 16 => " ", 19 => " ", 21 => " ", 24 => "L", 26 +=> " ", 29 => " ", 32 => " " }, } [download] So then I tried 11 but it still put one extra in the middle row: C:\test>1114833 { 1 => { 1 => "T", 4 => "S", 6 => "E", 8 => "C", 10 => "I", 13 => "E", + 15 => "N", 17 => "E", 19 => "O", 22 => "T", 24 => "Y", 26 => "U", 29 + => "E" }, 3 => { 1 => " ", 4 => "I", 6 => "I", 8 => "L", 10 => "V", 13 => "E", + 15 => "V", 17 => "N", 19 => "U", 22 => "Y", 24 => "Z", 26 => "L", 29 + => " " }, 5 => { 1 => " ", 4 => "I", 6 => "O", 8 => "L", 10 => "I", 13 => "E", + 15 => "D", 17 => "P", 19 => " ", 20 => "B", 22 => "H", 24 => "O", 26 + => "S", 29 => " " }, 7 => { 1 => " ", 4 => "B", 6 => "I", 8 => "C", 10 => "C", 13 => "Y", + 15 => "D", 17 => "I", 19 => "T", 22 => "Z", 24 => "I", 26 => " ", 29 + => " " }, 9 => { 1 => " ", 4 => " ", 6 => "N", 8 => " ", 10 => "K", 13 => "A", + 15 => " ", 17 => " ", 19 => " ", 22 => "L", 24 => " ", 26 => " ", 29 + => " " }, } [download] So then I tried 10.5 and voilà! I also tried dividing the overall width of the longest line by the number of chars: 327-18 / 13 = 23.769... And just now I tried taking the differences of all the x1s in the longest row: `T 18 15 28 27 0 S 45 15 54 27 0 -> 27 E 70 15 77 27 0 -> 25 C 95 15 103 27 0 -> 25 I 119 15 128 27 0 -> 24 E 146 15 153 27 0 -> 27 N 168 15 179 27 0 -> 22 E 196 15 203 27 0 -> 28 O 218 15 229 27 0 -> 22 T 244 15 254 27 0 -> 26 Y 269 15 278 27 0 -> 25 U 295 15 305 27 0 -> 26 E 320 15 327 27 0 -> 25` [download] Then averaging those: 27+ 25+ 25+ 24+ 27+ 22+ 28+ 22+ 26+ 25+ 26+ 25 = 302 / 12 = 25.166666666666666666666666666667 An' wadda ya know. It works perfectly! With the rise and rise of 'Social' network sites: 'Computers are making people easier to use everyday' Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error. "Science is about questioning the status quo. Questioning authority". I'm with torvalds on this In the absence of evidence, opinion is indistinguishable from prejudice. Agile (and TDD) debunked	[reply] [d/l] [select]
Re^2: Converting tesseract box data into 2d grid by Anonymous Monk on Jan 29, 2015 at 00:49 UTC
You're right about the bad data, I think I have to preprocess the image a bit, maybe add a threshold and blur filter before doing the ocr.	[reply]