{"id":4457,"date":"2026-10-23T00:04:10","date_gmt":"2026-10-22T16:04:10","guid":{"rendered":"https:\/\/www.carbon-fiber-corp.com\/carbon-fiber-3d-scan-map-alignment\/"},"modified":"2026-10-23T00:04:10","modified_gmt":"2026-10-22T16:04:10","slug":"carbon-fiber-3d-scan-map-alignment","status":"publish","type":"post","link":"https:\/\/www.carbon-fiber-corp.com\/it\/carbon-fiber-3d-scan-map-alignment\/","title":{"rendered":"A 3D Scan Colour Map Needs an Alignment Definition"},"content":{"rendered":"<style>.ly-note{max-width:880px;margin:0 auto;color:#26333c;line-height:1.85;font-size:17px}.ly-note h2{font-size:1.5rem;line-height:1.35;margin:1.8em 0 .6em}.ly-note p{margin:0 0 1.2em}.ly-note .intro{font-size:1.08em}.ly-note figure{margin:2em 0}.ly-note figure img{display:block;width:100%;height:auto}.ly-note figcaption{font-size:.88rem;color:#60727d;line-height:1.55;margin-top:10px}.ly-note ul{padding-left:1.4em}.ly-note li{margin:.45em 0}.ly-note a{color:#8e1e34;text-decoration:underline;text-underline-offset:3px}.ly-note .notes{padding:20px 28px;background:#f0f4f5;border-left:3px solid #296c85;margin:2em 0}.ly-note .notes h2{font-size:1.1rem;margin:0 0 .8em}.ly-note .reading{border-top:1px solid #d9e1e5;margin-top:2em;padding-top:1.1em}.single-post .entry-title{font-size:clamp(1.8rem,3.8vw,2.6rem);line-height:1.25}.single-post .post-thumb-img-content img{width:100%;height:auto;max-height:360px;object-fit:contain;background:#fbfcfc}@media(max-width:600px){.ly-note{font-size:16px}.ly-note h2{font-size:1.3rem}.ly-note .notes{padding:17px}}<\/style><div class=\"ly-note\"><p class=\"intro\">A colour comparison between a scan and nominal CAD geometry needs an identified alignment and evaluation rule. The colours show a result within that setup; they are not self-explanatory acceptance labels. Keep the reference scheme and actual measured coverage with the report.<\/p><h2>Distinguish alignment choices<\/h2><p>A comparison fitted broadly to a surface can answer a different question from one referenced to specified assembly datums. State which approach is required for the feature under review. Do not change alignment merely to obtain a more favourable-looking colour map, or infer assembly fit from a comparison that used another reference.<\/p><h2>Show the evaluated surface<\/h2><p>Retain the measured coverage, excluded regions and the part condition during scanning. The nominal model revision, units and display scale also belong with the result. Areas without usable measurement data should not be interpreted as passing regions simply because they are absent from the picture.<\/p><h2>Make the conclusion readable<\/h2><p>Identify which features were evaluated and the requirement supporting the disposition. A shape comparison is useful evidence, but it may not replace every required dimensional or functional check. NIST publishes work on performance testing of optical coordinate systems; that background reinforces the need to retain the method context rather than relying only on the density or visual detail of a point cloud.<\/p><figure><a href=\"https:\/\/www.carbon-fiber-corp.com\/wp-content\/uploads\/2026\/10\/ly-geo-20261022-11-scan-map-2.webp\" aria-label=\"Open the full-size diagram\"><img src=\"https:\/\/www.carbon-fiber-corp.com\/wp-content\/uploads\/2026\/10\/ly-geo-20261022-11-scan-map-2.webp\" alt=\"A specified datum alignment and another surface alignment can answer different questions.\" width=\"1600\" height=\"1000\" loading=\"lazy\" decoding=\"async\"><\/a><figcaption>A specified datum alignment and another surface alignment can answer different questions. <a href=\"https:\/\/www.carbon-fiber-corp.com\/wp-content\/uploads\/2026\/10\/ly-geo-20261022-11-scan-map-2.webp\">View full size<\/a>.<\/figcaption><\/figure><aside class=\"notes\"><h2>Useful information for an enquiry<\/h2><ul><li>Alignment and reference scheme<\/li><li>Nominal revision, units and scale<\/li><li>Measured and excluded regions<\/li><li>Feature-specific evaluation conclusion<\/li><\/ul><\/aside><p>Further reading: <a href=\"https:\/\/www.nist.gov\/publications\/standardized-performance-testing-metrics-optical-coordinate-measurement-systems-0\">NIST: optical coordinate measurement system performance<\/a>.<\/p><div class=\"reading\"><p>Related: <a href=\"https:\/\/www.carbon-fiber-corp.com\/carbon-fiber-inspection-coordinates-agree-units-axes-and-file-format\/\">Carbon Fiber Inspection Coordinates: Agree Units, Axes and File Format<\/a> \u00b7 <a href=\"https:\/\/www.carbon-fiber-corp.com\/carbon-fiber-surface-roughness-gloss\/\">Surface Roughness and Gloss on Carbon Fiber Parts Need Separate Requirements<\/a>.<\/p><p><a href=\"https:\/\/www.carbon-fiber-corp.com\/contact\/\">Discuss your component with Litian Yunde<\/a> \u00b7 <a href=\"https:\/\/www.carbon-fiber-corp.com\/carbon-fiber-guides\/\">Browse the component guides<\/a><\/p><\/div><\/div><script type=\"application\/ld+json\" class=\"ly-article-schema\">{\"@context\": \"https:\/\/schema.org\", \"@type\": \"BlogPosting\", \"@id\": \"https:\/\/www.carbon-fiber-corp.com\/carbon-fiber-3d-scan-map-alignment\/#article\", \"headline\": \"A 3D Scan Colour Map Needs an Alignment Definition\", \"description\": \"A 3D scan colour map needs a defined alignment, nominal revision, measured coverage and evaluation rule. Keep the setup with the reported conclusion.\", \"image\": [\"https:\/\/www.carbon-fiber-corp.com\/wp-content\/uploads\/2026\/10\/ly-geo-20261022-11-scan-map-1.webp\", \"https:\/\/www.carbon-fiber-corp.com\/wp-content\/uploads\/2026\/10\/ly-geo-20261022-11-scan-map-2.webp\"], \"datePublished\": \"2026-10-22T16:04:10Z\", \"mainEntityOfPage\": {\"@type\": \"WebPage\", \"@id\": \"https:\/\/www.carbon-fiber-corp.com\/carbon-fiber-3d-scan-map-alignment\/\"}, \"author\": {\"@type\": \"Organization\", \"name\": \"Litian Yunde\", \"url\": \"https:\/\/www.carbon-fiber-corp.com\/about\/\"}, \"publisher\": {\"@type\": \"Organization\", \"name\": \"Dongguan Litian Yunde New Materials Technology Co., Ltd.\", \"url\": \"https:\/\/www.carbon-fiber-corp.com\/\"}, \"inLanguage\": \"en\", \"articleSection\": \"Inspection & Testing\"}<\/script>","protected":false},"excerpt":{"rendered":"<p>A colour comparison between a scan and nominal CAD geometry needs an identified alignment and evaluation rule. The colours show a result within that setup; they are not self-explanatory acceptance labels. Keep the reference scheme and actual measured coverage with the report.<\/p>","protected":false},"author":1,"featured_media":4424,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_seopress_titles_title":"3D Scan Colour Maps and Alignment | Litian Yunde","_seopress_titles_desc":"A 3D scan colour map needs a defined alignment, nominal revision, measured coverage and evaluation rule. 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