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Table 1 Per page word block parameters symbols and their definitions

From: Layout-aware text extraction from full-text PDF of scientific articles

Parameter Symbols

Definitions

w height

Word block height

δw horizontal

Horizontal space between words

δw vertical

Vertical space between words

max i f (δw height )

Most Popular Word block height in a page i

max i f (δw horizontal )

Most Popular Horizontal space between word blocks in a page i

max i f (δw vertical )

Most Popular Vertical space between word blocks in a page i

ϕ EW = maxi f (δw height ) + maxi f (δw horizontal )

east–west word block expansion parameters in page

ϕ NS = maxi f (δw height ) + maxi f (δw vertical )

north–south word block expansion parameters in page