Readonlycharfalse links glyphs into line-level components and keeps each one's
angle; true breaks lines into upright per-glyph components (angle 0).
ReadonlylinkAffinity-score threshold for linking adjacent glyphs into a line.
ReadonlylowMinimum peak region score for a component to survive.
ReadonlyminComponents covering fewer heatmap pixels than this are dropped.
ReadonlyscaleMultiplier from heatmap pixels to the returned coordinates. CRAFT's
heatmap is half the detector input, so pass inputHeight / heatHeight.
ReadonlytextRegion-score threshold for a pixel to count as text.
Thresholds for extractCraftTextBoxes.