KET writing essays, A3 → A4

Before & after

Before

After

The task

A scanned PDF of KET writing model essays arrived via WeChat — 16 pages mixing A3-style landscape double-page spreads with normal A4 pages. The user wanted it split into a uniform A4 set for printing.

Image preview was unavailable in that session, so Xiaohe analyzed the pages programmatically: ink profiles, gutter detection, and coarse ASCII renders to tell two-page spreads apart from single landscape pages.

Each spread split at the actual content gap (~51.5%), not a blind 50%, so no text column got clipped. Result: 30 pages, all exactly A4, plus a numbered preview sheet for review.

How Xiaohe did it

• 1. Inspect

  Read the 16-page scan; page sizes are a non-standard 364 mm wide canvas.

  pdfinfo KET写作范文.pdf

• 2. Analyze the layout

  Ink profiles and gutter detection reveal pages 2–15 are two A4 pages side by side (A3); pages 1 and 16 are single A4.

• 3. Split at the gap

  Divide each spread at the content gap (~51.5%) so the last text column is not clipped.

  PyMuPDF · crop at content-gap

• 4. Verify

  Confirm all 30 output pages are exactly 595 × 842 pt (A4).

• 5. Preview

  Render a numbered contact sheet of the 30-page result, plus one of the original 16 pages, for review.

• 6. Deliver

  Move the A4 PDF and previews into share/, ready to print.

Skills used

• mytoolkit · pdf
• PyMuPDF
• mywechat

Deliverables