初級

画像編集：領域編集と反復

選択編集、アスペクト切替、書き出しチェックリスト。

4/26/2026 · AIImage Team #編集#AI Chat#ワークフロー

Generation is only the start. AI Image 2’s edit loop in AI Chat (region edits + dialog iteration + aspect switch) often beats full re-rolls for time and fidelity. This tutorial is a hands-on manual in real revision order.

Edit toolbox overview

Method	Best for	Advantage
Dialog iteration	Color, copy, style tweaks	No selection learning curve
Region select	Local objects, title bars	Preserves other pixels
Aspect switch	Landscape to portrait	Smart composition extension
Reference upload	Brand product alignment	Reduces distortion

1. Dialog iteration: one dimension per turn

Template

Keep the previous image composition and subject unchanged, only apply:
- [change item 1]
Do not change: background, product angle, unmentioned text.

Examples

Change only: headline to “Year-End Gala”, color #C41E3A.
Change only: remove passerby on the right.
Change only: background from indoor to sunset beach; product stays.

Avoid: changing copy, product, style, and ratio together—the model will full redraw.

2. Region select editing

Open generated image in edit mode.
Brush/box select the target area (tight to edges).
Enter precise instruction, e.g.:
- Change selected headline to "NEW" bold red
- Change selected cup to blue ceramic; rest unchanged
Zoom 100% to check seams and lighting.

Good for regions: title bars, price tags, single product/face, local blemishes. Poor for: whole-image grade, multi-object lighting chains.

3. One-click aspect switch

Change the previous image to 9:16 vertical Story,
subject centered, top 15% safe zone for headline "Summer Special",
do not crop off the product on the sides.

Channel	Ratio
Feed header	16:9 or 2:1
Xiaohongshu	3:4
Instagram post	1:1
Story / Reels	9:16
E-commerce banner	Often 3:1 or platform spec

After switching, verify text is not cropped—portrait often trims side slogans.

4. Reference-driven editing

Upload approved brand product photography.

Match the earbuds in the uploaded reference photo,
generate the same earbuds on a café table lifestyle scene,
do not alter earbud structure, blurred background.

Better than pure text for “earbuds turning into beans” problems.

5. Editing Thinking series images

If image 5 in a Thinking series fails:

First region-edit image 5 with the series “character lock” sentence.
If still failing, solo prompt: “Continue series 1–4 style, regenerate image 5: …”
Avoid Instant fixes on Thinking series—style may drift.

6. Pre-export QA checklist (print beside monitor)

All quoted copy spelled correctly
Prices, dates, legal terms match ops sheet
No extra fingers, warped text, fake logos
Brand color near hex (±10% visual OK)
Critical info inside safe zones
Resolution meets platform minimum

7. When to abandon edit and regenerate

Limb structure errors
Large text wrong 3+ times
Product category wrong (shoe became bag)

Then tighten brief via Prompt engineering and Thinking re-roll—faster than endless local patches.

Practice (20 minutes)

Generate one 16:9 banner with two Chinese lines.
Region-edit headline color only.
Dialog-switch to 1:1; check crop.
Note which step took longest—optimize templates next week.

Edit skill decides whether AI images are a toy or production-line semifinished goods. Proficient teams often ship one poster in 15 minutes including human proofing.