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NadirPatch — 360° Nadir Logo Patch

Cover the tripod at the bottom of your 360° photo with your logo — for free, right in your browser. NadirPatch warps the logo into the equirectangular projection, previews the nadir close-up live, and exports a JPEG that keeps its 360 metadata so Facebook, Google Street View, Kuula, and every pano viewer still recognize it as a panorama.

  • 发布于
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工具摘要

此工具接收结构化输入，在浏览器中返回确定性输出，无需上传到服务器。

工具名称
NadirPatch — 360° Nadir Logo Patch
输入意图
提供需要转换、校验或分析的原始内容。
输出意图
获得可直接复制、复用或排错的规范化输出。
示例输入
8192×4096 equirectangular JPEG with a tripod visible at the bottom + a transparent PNG logo
示例输出
Same 8192×4096 JPEG with the logo as a clean circle at the nadir, GPano metadata intact

1. Your logo

PNG, JPEG, WebP, or SVG up to 300KB. Transparent PNG or SVG looks best — the logo is cropped to a circle at the nadir.

2. Your 360° photo

工具介绍

Cover the tripod at the bottom of your 360° photo with your logo — for free, right in your browser. NadirPatch warps the logo into the equirectangular projection, previews the nadir close-up live, and exports a JPEG that keeps its 360 metadata so Facebook, Google Street View, Kuula, and every pano viewer still recognize it as a panorama.

工具概览

Every tripod-shot 360° photo has the same blemish: the tripod head staring up from the nadir (the bottom pole of the sphere). NadirPatch fixes it the way professional stitchers do — by compositing a logo disc over the nadir, mapped with an azimuthal projection so it looks perfectly circular when viewed in any 360 player, not smeared across the bottom of the flat image. Two things make this tool different from most free nadir patchers. First, it is genuinely private: the panorama is processed entirely in your browser with canvas — it is never uploaded, so a 25MB photo patches in seconds with no queue, no watermark, and no server ever seeing your work. Second, it protects the one thing that makes a 360 file a 360: the GPano XMP metadata. Browser image exports normally strip metadata, which silently turns your panorama into an ordinary flat photo on Facebook or Street View. NadirPatch re-injects your photo's original XMP packet into the export byte-for-byte — or writes a fresh equirectangular GPano block if the source had none — so the patched file behaves exactly like the original. A free account (sign in with Google, GitHub, Microsoft, LinkedIn, or an email link) stores your logo and settings, so returning to patch the next shoot is one click; the photos themselves are never stored anywhere.

使用场景

  • Replace the tripod head in real-estate and virtual-tour panoramas with the agency's logo
  • Brand 360 photos before publishing to Google Street View or Kuula
  • Patch the nadir of drone or monopod panoramas where the ground rig is visible
  • Add a circular copyright badge to club, venue, or event panoramas
  • Fix a batch of tour shots on a laptop in the field — no Photoshop, no upload, no queue

输入/输出示例

Patch size 20°, feather 12% — the defaults suit most tripod heads.
输入意图
8192×4096 equirectangular JPEG with a tripod visible at the bottom + a transparent PNG logo
输出意图
Same 8192×4096 JPEG with the logo as a clean circle at the nadir, GPano metadata intact
Files without 360 metadata gain it on export, so viewers recognize them as panoramas.
输入意图
A PNG panorama exported from a stitcher with no metadata
输出意图
JPEG with a fresh GPano equirectangular XMP block written in

常见问题

Is my 360 photo uploaded to your servers?+
No — never. The panorama is decoded, patched, and re-encoded entirely in your browser using canvas. The only thing optionally stored (in your account) is your logo, capped at 300KB, so it can follow you across devices.
Why do I need to sign in to patch a photo?+
The account keeps your logo and patch settings synced so repeat work is one click, and it helps us keep the tool free and abuse-free. Signing in is free — Google, GitHub, Microsoft, LinkedIn, or an email magic link — and your photos still never leave your device.
Will Facebook, Google Street View, and Kuula still see the export as a 360?+
Yes — this is the tool's core promise. Browsers strip metadata when exporting from canvas, which is how most free patchers silently break panoramas. NadirPatch re-injects your file's original XMP GPano segment (or writes a fresh equirectangular one) at the byte level, so the exported JPEG carries the same 360 markers as the original.
What patch size should I use?+
The patch size is the angular radius from the nadir. 15–25° covers a normal tripod head; go larger for a visible tripod column or drone landing gear. The live nadir view shows exactly what the circle covers.
Why does the logo look stretched at the bottom of the exported image?+
That's correct behavior. In the flat equirectangular file the bottom rows are hugely stretched, but a 360 viewer compresses them back onto the sphere's pole — where your logo appears as a perfect circle. Judge the result by the nadir view in the tool, not by the flat image.
What image sizes and formats are supported?+
JPEG, PNG, and WebP panoramas up to roughly 80 megapixels (for example 12288×6144) — 8K×4K exports from consumer 360 cameras are comfortable. Logos can be PNG, JPEG, WebP, or SVG up to 300KB.
Does it work with images that have no 360 metadata?+
Yes. If the source has no GPano XMP (common for PNGs or edited files), the export gains a standards-compliant equirectangular GPano block with the correct dimensions, so platforms treat it as a panorama.

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