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The circular Hough Transform is highly efficient for separated circles with reasonable background contrast, but not for large amounts of partially overlapping shapes, some of them blurred, as in the images of our dense droplet suspensions. We explain why standard approaches for image improvement fail and present a \u201cshootout\u201d approach, where already detected circles are masked, so that the removal of sharp outlines improves the relative optical quality of the remaining droplets. Nevertheless, for intrinsic reasons, there are limits to the accuracy of data which can be obtained on very dense clusters.<\/jats:p>","DOI":"10.1007\/978-3-031-23929-8_5","type":"book-chapter","created":{"date-parts":[[2023,1,21]],"date-time":"2023-01-21T14:02:39Z","timestamp":1674309759000},"page":"51-62","update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["The Good, the\u00a0Bad and\u00a0the\u00a0Ugly: Droplet Recognition by\u00a0a\u00a0\u201cShootout\u201d-Heuristics"],"prefix":"10.1007","author":[{"given":"Hans-Georg","family":"Matuttis","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Silvia","family":"Holler","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Federica","family":"Casiraghi","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Johannes Josef","family":"Schneider","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Alessia","family":"Faggian","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Rudolf Marcel","family":"F\u00fcchslin","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Martin Michael","family":"Hanczyc","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"297","published-online":{"date-parts":[[2023,1,22]]},"reference":[{"key":"5_CR1","doi-asserted-by":"crossref","unstructured":"Flumini, D., Weyland, M.S., Schneider, J.J., Fellermann, H., F\u00fcchslin, R.M.: Towards programmable chemistries. 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