Function extractCraftTextBoxes

extractCraftTextBoxes(heatmap: Tensor, options: CraftDecodeOptions): CraftBox[]
Decodes a CRAFT region and affinity heatmap into text component boxes: thresholds the two score maps, links (or, with charLevel, separates) glyphs into connected components and fits a rotated rectangle to each.

Line grouping and reading order are computed in TypeScript on the returned boxes.
Parameters
- heatmap: Tensor
  The detector's float32 output of shape [heatHeight, heatWidth, 2] (a leading batch dimension of 1 is accepted), region and affinity scores interleaved.
- options: CraftDecodeOptions
  Decode thresholds and the heatmap-to-input scale.
Returns CraftBox[]
One box per surviving component, in no particular order.

Throws
With code INVALID_ARGUMENT when the heatmap is not of the expected dtype and shape or an option is out of range.