use of bit masks in document retrieval systems
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use of bit masks in document retrieval systems

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Published by University of Toronto, Dept. of Computer Science in Toronto .
Written in English


Book details:

Edition Notes

Thesis (M.Sc.)--University of Toronto, 1971.

StatementDonald C. Brady.
ID Numbers
Open LibraryOL19298666M

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  The Information Technology Laboratory (ITL), one of six research laboratories within the National Institute of Standards and Technology (NIST), is a globally recognized and trusted source of high-quality, independent, and unbiased research and data. ITL’s mission, to cultivate trust in. By documents we mean whatever units we have decided to build a retrieval system over. They might be individual memos or chapters of a book (see Section (page) for further discussion). We will refer to the group of documents over which we perform retrieval as the (document) collection. Bit-Masking means imposing mask over bits. Here is a bit-masking with AND-1 1 1 0 1 1 0 1 [input] (&) 0 0 1 1 1 1 0 0 [mask] 0 0 1 0 1 1 0 0 [output] So, only the middle 4 bits (as these bits are 1 in this mask) remain. Lets see this with XOR-. A Prototype System for the Electronic Storage kd Retrieval of Document Images G. R. THOMA, S. SUTHASINEKUL, F. L. WALKER, J. COOKSON, and.

The “concordance” of an information retrieval system can often be stored in form of bit-maps, which are usually very sparse and should be compressed. Hierarchical bit-vector compression consists of partitioning a vector v i into equi-sized blocks, constructing a new bit-vector v i +1 which points to the non-zero blocks in v i, dropping the. I can’t take it any more. I might be a bit early, but this weekend I’m starting my spring cleaning. It could take a while. Clearing out the clutter that’s piled up all winter and reorganizing my somewhat disheveled home is a big project—and one that will bring me unmatched peace and .   In this paper, we propose a Document Image Retrieval System (DIRS) based on word spotting, which has a high noise tolerance and is language independent. The proposed technique encounters the document retrieval problem using a word matching procedure, which performs the word matching directly in the document images bypassing OCR and using word. Why do we use bit masking? We use bit masking to store multiple layers of values in the same set of numbers. Let us understand this with an example: consider the set S={1,2,3,4,5,6,7}. To represent the set{2,3,5}, we can use the bitmask Using Bitmasks in C++. Bitmasks can be used for the following operations: To set the ith bit.