NLA Trial index

NLA Trial Articles from 1992

Notes
  1. Accuracy of OCR and overProof is measured in comparison with the human corrections. We know human corrections in this sample are incomplete, and themselves contain errors, but they are the best we could find automatically from the NLA newspapers corpus, tagged as completely corrected then further filtered to those with at least 3 corrections, at least 40% of lines corrected and lowest third percentage of non-dictionary words.
  2. Accuracy is measured by a separate process from that used to colour words in this output: the colouring process is heuristic, and not completely accurate.
  3. Colour legend:
    Text - OCR text corrected by human and/or overProof
    Text - human and/or overProof corrections
    Text - discrepencies between human and/or overProof
    Text - human corrections not applied by overProof
  4. Identified overProof corrections are calculated by the statistical calculation process, and shows those words changed by overProof which ALSO match human corrections. As human corrections are often wrong and incomplete, so too is this list.
  5. Identified overProof non-corrections are calculated by the statistical calculation process, and shows those words in the overProof output which DO NOT MATCH human corrections. As human corrections are often wrong and incomplete, so too is this list. Words marked as [**VANDALISED] are those which have been changed by overProof but not by the human correction; as before, a missed human correction will be (incorrectly) classified as vandalisation by overProof.
  6. Searchability of unique words refers to the distinct words in an article, and how many are present before and after correction. It is measure of how many of the words within an article could be used to find the article using a search engine.
  7. Weighted Words refers to a calculation in which common words count for little (a fraction of a word) and unusual words count for more, in proportion to the log of the inverse of their frequency in the corpus. It may be an indicator of how well distinctive words in an article can be searched before and after correction.

Article ID 126935131, Detailed lists, results, guides, New releases, page 34 1992-07-13, The Canberra Times (ACT : 1926 - 1995), 91 words, 5 corrections

Raw OCRHuman CorrectedoverProof Corrected
New releases New releases New releases
Category | Title | Rating Category | Title . . . . . . . . . . . . . . . . . . | Rating Category | Title a Rating
Drama | The Legend | M Drama . . | The Legend . . . . . . . . . . . | M Drama The Legend | M
of Kootenai Brown . . . . . . . . . . of Kootenai Brown of Kootenay Brown
Double Crossed M . . . . . . . . . | Double Crossed . . . . . . . | M Double Crossed M .
Wife, Mother, Murderer PG " . . . . . . . . . . . Wife, Mother, Murderer | PG Wife, Mother, Murderer PG "
Across The Tracks M . . . . . . . . . . . Across The Tracks . . . . . M Across The Tracks M
Action The Hitman M \ Action . . . . . .The Hitman . . . . . . . . . . . M Action The Hitman M A
The Flash , PG \ . . . . . . . . . . . The Flash . . . . . . . . . . . . PG The Flash , PG A
Comedy Curly Sue PG Comedy . . . . Curly Sue . . . . . . . . . . . . PG Comedy Curly Sue PG
Ride the Wild Surf G' . . . . . . . . . . . Ride the Wild Surf . . . . . . G Ride the Wild Surf G'
Family Frogs . G Family . . . . . Frogs . . . . . . . . . . . . . . . . G Family FrogG 6
The Man from Button - G . . . . . . . . . . . The Man from Button . . . . G The Man from Sutton - G
Willow . . . . . . . . . . . Willow Willow
Horror- Body Parts .. R Horror . . . . . . Body Parts . . . . . . . . . . . . R Horror- Body Parts .. R
Graveyard Shift M . . . . . . . . . . . . Graveyard Shift . . . . . . . . M Graveyard Shift M
Doco 21 Up ■ G Doco . . . . . . . 21 Up . . . . . . . . . . . . . . . . G Dec 21 Up a G
Thriller Lower Level M Thriller . . . . . . Lower Level . . . . . . . . . . . M Thriller Lower Level M
The Comfort ' M . . . . . . . . . . . . The Comfort . . . . . . . . . . . M The Comfort ' M
of Strangers . . . . . . . . . . . . of Strangers of Strangers
Deadly Chase . M . . . . . . . . . . . . Deadly Chase . . . . . . . . . . M Deadly Chase M
Musical Willie Nelson's 4th PG Musical . . . . . . Willie Nelson's 4th . . . . . . PG Musical Willie Nelson's 4th PG
of July Picnic . . . . . . . . . . . . . of July Picnic of July Picnic
Identified overProof corrections
Identified overProof non-corrections DOCO [**VANDALISED] FROGS [**VANDALISED] BUTTON [**VANDALISED] KOOTENAI [**VANDALISED]
Word
count		OCR
accuracy %		overProof
accuracy %		Errors
corrected %
All Words64100.093.8-525.0
Searchability of unique words53100.092.5-654.7
Weighted Words100.093.0-277.3

Accumulated stats for 1 articles from year 1992

Word
count		OCR
accuracy %		overProof
accuracy %		Errors
corrected %
All Words64100.093.8-∞
Searchability of unique words53100.092.5-∞
Weighted Words100.093.0-∞