IRS13
Scientific Report No. IRS-13 Information Storage and Retrieval
Evaluation Parameters
chapter
E. M. Keen
Harvard University
Gerard Salton
Use, reproduction, or publication, in whole or in part, is permitted for any purpose of the United States Government.
11-32
xh u Number of Requests
Entering Average
Precision
1.0
0.8
0.6
0.4
0.2
¼~
\31
[OCRerr]4l
[OCRerr]4l [OCRerr]4I
[OCRerr] 42
x
````` Recoil
0 0.2 0.4 0.6 0.8
1.0
Cr an-i, A[OCRerr]stract S, Stem, "[OCRerr]uas i -Cranfield'1
Cut-off, Macro Evaluation of [OCRerr]2 Requests.
Illustration of First )4ethod of Averaging Where
Individual Requests have Var[OCRerr]g Amounts of Relevant Documents
Fig. 18