pub fn segment_words(line: &RgbImage) -> Vec<(u32, u32, u32, u32)>Expand description
Split a text line into word tokens by a vertical ink-projection profile:
runs of ink columns separated by whitespace wider than ~0.6× the line
height (an inter-word/-column gap, not an inter-character one). Returns tight
(l, 0, r, h) boxes in line-crop pixels. The browser table path recognizes
these individually so each word carries its own box for column matching —
the native pipeline gets word boxes from the pdfium text layer instead.