img-grid

You can overlay a numbered measurement grid on the image to determine precise column and row boundaries for layout reconstruction. The grid provides readable indices for counting spans accurately.

You can calculate columnWidth ratios by recording exact grid-line coordinates on a numbered overlay image. This helps derive relative widths for each column boundary to match the original form.

Yes, the image grid overlay uses Python Pillow to render red vertical and blue horizontal grid lines with readable indices on your input image. It outputs a saved image for downstream coordinate extraction.

Yes, you can control the grid density when analyzing printed form layouts by specifying column divisions. You can also optionally auto-match square-ish cells to fit your measurement needs.

After applying a layout measurement grid, you extract precise column boundaries by reading the numbered grid-line coordinates from the saved output image. These coordinates help derive your layout proportions for downstream use.

A limitation of using numbered grid lines for complex form sections is that it requires manual coordinate extraction from the saved image. You must visually identify and record spans across complex sections yourself.