- \n
- The part does not need to be fitted with reference points.<\/li>\n\n\n\n
- Reference points can easily be placed on the fixture itself.<\/li>\n\n\n\n
- Suitable for fully automated measurement methods.<\/li>\n<\/ul>\n\n\n\n
Disadvantages<\/h4>\n\n\n\n
- \n
- The fixture can block the line of sight, preventing certain zones from being fully scanned. <\/li>\n\n\n\n
- Data loss occurs at the locations where the part is supported.<\/li>\n<\/ul>\n\n\n\n
![\"\"](\"https:\/\/tetravision.be\/wp-content\/uploads\/2026\/04\/IMG_1946-groot.jpeg\")
<\/figure>\n\n\n\nOption 2: Reference points on the part<\/h2>\n\n\n\n
An alternative approach is to apply reference points directly onto the part to be measured. This allows the individual scans to be accurately transformed to the same reference.<\/p>\n\n\n\n
Advantages<\/h4>\n\n\n\n
- \n
- High accuracy, because each scan series is linked to the same measurement series. <\/li>\n\n\n\n
- Easy to verify: large errors in the alignment are immediately noticeable.<\/li>\n<\/ul>\n\n\n\n
Disadvantages<\/h4>\n\n\n\n
- \n
- The part must be fitted with adhesive reference points, which can sometimes be undesirable.<\/li>\n<\/ul>\n\n\n\n
![\"\"](\"https:\/\/tetravision.be\/wp-content\/uploads\/2026\/04\/Reference-Markers-Large-groot.jpeg\")
<\/figure>\n\n\n\nOption 3: Best-fit alignment<\/h2>\n\n\n\n
For parts that are too small for a fixture or too delicate to apply reference points to, a best-fit strategy offers a solution. In this approach, the individual scan series are aligned to each other based on common geometry.<\/p>\n\n\n\n
Requirements<\/h4>\n\n\n\n
- \n
- The part must contain sufficient geometric features. <\/li>\n\n\n\n
- Each scan series must have overlapping geometry with the previous series.<\/li>\n<\/ul>\n\n\n\n
Advantages<\/h4>\n\n\n\n
- \n
- No contamination or damage from reference points. <\/li>\n\n\n\n
- No disassembly needed to remove reference points. <\/li>\n\n\n\n
- Very accurate, provided the part offers sufficient geometric reference.<\/li>\n<\/ul>\n\n\n\n
Disadvantages<\/h4>\n\n\n\n
- \n
- Not usable for parts with few unique geometric features.<\/li>\n<\/ul>\n\n\n\n
Comparison of the options<\/h2>\n\n\n\n
Option<\/strong><\/td> Advantages<\/strong><\/td> Disadvantages<\/strong><\/td> Application<\/strong><\/td><\/tr> Fixture<\/strong><\/td> – No reference points on part
– Can be used in automated setups<\/td>– Data loss due to support
– Fixture blocks line of sight<\/td>– Fully automated measurements<\/td><\/tr> Reference points<\/strong><\/td> – High accuracy
– Verifiable<\/td>– Part must be fitted with markers<\/td> – Precision applications<\/td><\/tr> Best-fit<\/strong><\/td> – No markers needed
– High accuracy with sufficient geometry<\/td>– Not usable for simple shapes<\/td> – Small or delicate parts<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n Conclusion<\/h2>\n\n\n\n
The choice of the right method strongly depends on the nature of the part and the requirements of the measurement. A fixture is ideal for automated processes, but can lead to data loss. Reference points offer high accuracy and control, but are not always applicable. Best-fit is a flexible and clean solution, provided the part has sufficient geometry.<\/p>\n","protected":false},"excerpt":{"rendered":"
When digitizing parts with an optical scanner, it is often a challenge to fully and accurately capture both the top and bottom sides. Depending on the shape, size and sensitivity of the part, different methods are possible. In this case study, we compare three approaches: using a fixture, using reference points and a best-fit strategy. […]<\/p>\n","protected":false},"author":5,"featured_media":3866,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[1],"tags":[],"class_list":["post-3911","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-niet-gecategoriseerd"],"acf":[],"_links":{"self":[{"href":"https:\/\/tetravision.be\/en\/wp-json\/wp\/v2\/posts\/3911","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/tetravision.be\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/tetravision.be\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/tetravision.be\/en\/wp-json\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/tetravision.be\/en\/wp-json\/wp\/v2\/comments?post=3911"}],"version-history":[{"count":1,"href":"https:\/\/tetravision.be\/en\/wp-json\/wp\/v2\/posts\/3911\/revisions"}],"predecessor-version":[{"id":3913,"href":"https:\/\/tetravision.be\/en\/wp-json\/wp\/v2\/posts\/3911\/revisions\/3913"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/tetravision.be\/en\/wp-json\/wp\/v2\/media\/3866"}],"wp:attachment":[{"href":"https:\/\/tetravision.be\/en\/wp-json\/wp\/v2\/media?parent=3911"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/tetravision.be\/en\/wp-json\/wp\/v2\/categories?post=3911"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/tetravision.be\/en\/wp-json\/wp\/v2\/tags?post=3911"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
- Not usable for parts with few unique geometric features.<\/li>\n<\/ul>\n\n\n\n
- The part must be fitted with adhesive reference points, which can sometimes be undesirable.<\/li>\n<\/ul>\n\n\n\n