The Geometry and Usage of the Supplementary Fisheye Lenses in Smartphones

Abstract

Nowadays, mobile phones are more than a device that can only satisfy the communication need between people. Since fisheye lenses integrated with mobile phones are lightweight and easy to use, they are advantageous. In addition to this advantage, it is experimented whether fisheye lens and mobile phone combination can be used in a photogrammetric way, and if so, what will be the result. Fisheye lens equipment used with mobile phones was tested in this study. For this, standard calibration of 'Olloclip 3 in one' fisheye lens used with iPhone 4S mobile phone and 'Nikon FC-E9' fisheye lens used with Nikon Coolpix8700 are compared based on equidistant model. This experimental study shows that Olloclip 3 in one fisheye lens developed for mobile phones has at least the similar characteristics with classic fisheye lenses. The dimensions of fisheye lenses used with smart phones are getting smaller and the prices are reducing. Moreover, as verified in this study, the accuracy of fisheye lenses used in smartphones is better than conventional fisheye lenses. The use of smartphones with fisheye lenses will give the possibility of practical applications to ordinary users in the near future.

Analysis of the Photogrammetric Use of 360-Degree Cameras in Complex Heritage-Related Scenes: Case of the Necropolis of Qubbet el-Hawa (Aswan Egypt)

“…In general, calibration methods are based on points and lines, patterns and selfcalibration procedures. There are some studies related to calibration applied to fisheye lenses [73][74][75][76][77][78][79][80] and 360-degree cameras [51,69,70,[81][82][83], which have improved geometric results. Other studies showed comparisons between several types of cameras (perspective, fisheye, etc.)…”

Fisheye transformation enhances deep-learning-based single-cell phenotyping by including cellular microenvironment

“…Fisheye lenses utilize specific mapping (stereographic, equidistant, equisolid angle, orthogonal), which provides the images a characteristic convex non-rectilinear appearance. 28 These specific lenses have a wide range of applications due to their ability to provide rich visual information, including the generation of augmented or virtual reality, 29 improving the performance of intelligent robot vision systems, 30 and simplifying the complexity of surveillance systems. 31 Various correction models have been proposed to rectify the distortion of fisheye lenses.…”

Show me your neighbour and I tell what you are: fisheye transformation for deep learning-based single-cell phenotyping

“…Fisheye lenses are ultra-wide angle lenses capable of taking wide panoramic or hemispheric images, however, they incorporate a significant optical distortion into the process. Fisheye lenses utilise specific mapping (stereographic, equidistant, equisolid angle, orthogonal) which lands the images a characteristic convex non-rectilinear appearance 28 . These specific lenses have a wide range of applications due to their ability to provide rich visual information, including the generation of augmented or virtual reality 29 , improving the performance of intelligent robot vision systems 30 , and simplifying the complexity of surveillance systems 31 .…”