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POPHP Repairing Bad Text
 

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    <p>This is something I'm working on and I'd like input from the intelligent people here on StackOverflow.</p> <p>What I'm attempting is a function to repair text based on combining various bad versions of the same text page. Basically this can be used to combine different OCR results into one with greater accuracy than any of them individually.</p> <p>I start with a dictionary of 600,000 English words, that's pretty much everything including legal and medical terms and common names. I have this already.</p> <p>Then I have 4 versions of the text sample.</p> <p>Something like this:</p> <pre><code>$text[0] = 'Fir5t text sample is thisline'; $text[1] = 'Fir5t text Smplee is this line.'; $text[2] = 'First te*t sample i this l1ne.'; $text[3] = 'F i r st text s ample is this line.'; </code></pre> <p>I attempting to combine the above to get an output which looks like:</p> <pre><code>$text = 'First text sample is this line.'; </code></pre> <p>Don't tell me it's impossible, because it is certainly not, just very difficult.</p> <p>I would very much appreciate any ideas anyone has towards this.</p> <p>Thank you!</p> <p>My current thoughts:</p> <p>Just checking the words against the dictionary will not work, since some of the spaces are in the wrong place and occasionally the word will not be in the dictionary.</p> <p>The major concern is repairing broken spacings, once this is fixed then then the most commonly occurring dictionary word can be chosen if exists, or else the most commonly occurring non-dictionary word.</p>
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    1. COdo you want really want to combine the 4 versions to one, or is your target to take one line and fix it with the help of you dictionary?
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    2. COI can easily take one line and "spellcheck" it with the dictionary. But this will not help as many of the words are broken, the spaces being in the wrong places. This is why I need to compare the different lines, yes combine them into one.
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    3. COWhat you're talking about here sounds an awful lot like an Artificial Intelligence problem. It might be possible in PHP but it would certainly not be very efficient. I'd recommend looking for a commandline tool that does this is one exists and exec()ing it from PHP. If such a tool doesn't exist, then working out the algorithm would be a heck of a job. You could start by spell checking all your variants and assuming that all the words that are the same in all versions are correct. Then for lines where they are different, pick the word that appears the most often. After that, who knows?
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