IRS13 Scientific Report No. IRS-13 Information Storage and Retrieval Correlation Measures chapter K. Reitsma J. Sagalyn Harvard University Gerard Salton Use, reproduction, or publication, in whole or in part, is permitted for any purpose of the United States Government. ~REClSl0N .65 .60 - .55 - .50 - 45 - .40 - 35 - 30 - 25 - .20 - ( Results 1 0-0 with ADI Collection - AA Results with Cranfield Collection PRN Cosine Stiles Overlap Stiles Overlap Cosine ¶Y½ PRN I I I I I I I I I I I I I I I I I[OCRerr]i [OCRerr] 0.10 0.20 0.50 OAO 0.50 0.60 0.70 0.80 0.90 1.00 C[OCRerr]parison 0£ the results obtained with the four best correlation functions using the ADJ and CRANFIELD collections. Fig. 3