ON SELECTING IMAGES FROM AN UNAIMED VIDEO STREAM FOR PHOTOGRAMMETRIC MODELLING
| العنوان: | ON SELECTING IMAGES FROM AN UNAIMED VIDEO STREAM FOR PHOTOGRAMMETRIC MODELLING |
|---|---|
| المؤلفون: | Petri Rönnholm, Matti Vaaja, Tuomas Klockars, Heikki Kauhanen |
| المساهمون: | HUS Head and Neck Center, Korva-, nenä- ja kurkkutautien klinikka |
| المصدر: | ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences, Vol V-2-2020, Pp 389-394 (2020) |
| بيانات النشر: | Copernicus Publications, 2020. |
| سنة النشر: | 2020 |
| مصطلحات موضوعية: | lcsh:Applied optics. Photonics, 010504 meteorology & atmospheric sciences, Computer science, convolutional neural network, 02 engineering and technology, computer.software_genre, 01 natural sciences, Convolutional neural network, lcsh:Technology, Voxel, 0202 electrical engineering, electronic engineering, information engineering, Structure from motion, imaging geometry, Computer vision, 3125 Otorhinolaryngology, ophthalmology, structure-from-motion, 0105 earth and related environmental sciences, Block (data storage), business.industry, lcsh:T, lcsh:TA1501-1820, object detection, unaimed video, Object detection, Visualization, Photogrammetry, lcsh:TA1-2040, 020201 artificial intelligence & image processing, Artificial intelligence, business, voxel, lcsh:Engineering (General). Civil engineering (General), computer, Test data |
| الوصف: | In this paper, we illustrate how convolutional neural networks and voxel-based processing together with voxel visualizations can be utilized for the selection of unaimed images for a photogrammetric image block. Our research included the detection of an ear from images with a convolutional neural network, computation of image orientations with a structure-from-motion algorithm, visualization of camera locations in a voxel representation to detect the goodness of the imaging geometry, rejection of unnecessary images with an XYZ buffer, the creation of 3D models in two different example cases, and the comparison of resulting 3D models. Two test data sets were taken of an ear with the video recorder of a mobile phone. In the first test case, a special emphasis was taken to ensure good imaging geometry. On the contrary, in the second test case the trajectory was limited to approximately horizontal movement, leading to poor imaging geometry. A convolutional neural network together with an XYZ buffer managed to select a useful set of images for the photogrammetric 3D measuring phase. The voxel representation well illustrated the imaging geometry and has potential for early detection where data is suitable for photogrammetric modelling. The comparison of 3D models revealed that the model from poor imaging geometry was noisy and flattened. The results emphasize the importance of good imaging geometry. |
| وصف الملف: | application/pdf |
| اللغة: | English |
| تدمد: | 2194-9050 2194-9042 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5beff5377ff11a1586883b721b649799 https://www.isprs-ann-photogramm-remote-sens-spatial-inf-sci.net/V-2-2020/389/2020/isprs-annals-V-2-2020-389-2020.pdf |
| حقوق: | OPEN |
| رقم الأكسشن: | edsair.doi.dedup.....5beff5377ff11a1586883b721b649799 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 21949050 21949042 |
|---|