画像の結合

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Before/after: viewers assume same lighting and perspective—drift reads as fraud or over-retouching

`before-after-single-image` covers retouching, cleanliness, model, and product makeover stories. Compliance demands you do not crop away context to exaggerate change; medical/beauty posts must avoid efficacy promises. Match white balance and exposure when possible, or disclose shooting conditions in captions. Size print outputs from paper width × DPI—never upscale tiny web comps.

`before-after-single-image`: match canvas and viewpoint, merge, then caption exactly what changed

  1. Decide cropping rules: if allowed, crop both sides symmetrically; otherwise pad with whitespace. Prefer same camera, lens, and lighting—if not, disclose differences in two caption lines so viewers do not assume a lab-grade experiment.
  2. Reserve a wide gutter for “Before | After” typography on-brand; if one side was graded differently, keep internal histogram proof out of the public file.
  3. Run copyright/portrait releases; for print, compute pixels from sheet size × DPI—never upscale a web thumbnail.

Before/after FAQ: honest light, split line placement, rights, medical copy, print DPI

Client claims we darkened the left to hype the right—how to prove otherwise?
Keep RAW or batch-export hashes and forbid per-side curves—only translate and pad in the merge. Caption exact adjustments or explicitly state untouched global grades.
Vertical split bisects a face—looks grotesque. Better placement?
Put the seam on neutral background or symmetry axes, not nasal midlines or text baselines. Slider UIs still need both hero regions fully visible in static exports.
Want a competitor UI as the “before”—legal pitfalls?
UI copyrights and trademarks need counsel—often blur marks or rebuild illustrative mocks. Layout tools do not satisfy platform ToS or competition law.
Medical beauty post removed for exaggeration—copy guardrails?
Ban guaranteed cure language; add “results vary” plus interval between shots; mosaic sensitive anatomy per policy. The merge is not a compliance shield.
Same asset for social grid and pull-up banner—one export enough?
No—print needs higher DPI and bleed; export `_social` vs `_print` variants instead of infinite upscale.
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