Digital light field photography consists of recording the radiance along all rays (the 4D light field) flowing into the image plane inside the camera, and using the computer to control the final convergence of rays in final images. The light field is sampled with integral photography techniques, using a microlens array in front of the sensor inside a conventional digital camera. Previous work h...

Rapid, reliable and objective estimations of leaf area index (LAI) are essential for numerous studies of atmosphere–vegetation interaction, as LAI is very often a critical parameter in process-based models of vegetation canopy response to global environmental change. This paper reviews current knowledge concerning the use of direct and indirect methods for LAI determination. The value of optica...

AIM To evaluate the sensitivity and specificity of "fundus on phone' (FOP) camera, a smartphone based retinal imaging system, as a screening tool for diabetic retinopathy (DR) detection and DR severity in comparison with 7-standard field digital retinal photography. DESIGN Single-site, prospective, comparative, instrument validation study. METHODS 301 patients (602 eyes) with type 2 diabete...

Rapid texture mapping of buildings and other man-made objects is a key aspect for reconstruction of 3D city landscapes. An effective approach by the way of coarse-to-fine 3D city model generation based on digital photogrammetric theory is proposed. Three image sequences, two oblique photography to buildings’ walls and one vertical photography to building’s roof, acquired by digital video camera...

Technological developments in photography have continued to facilitate and enhance the practice of dentistry. This evolution to a contemporary photographic process is revolutionizing the way clinicians diagnose, treat, and communicate with patients and colleagues. In this technologically progressing profession, clinicians should consider using an objective strategy for the selection and applica...

This document describes the use of aerial photography and airborne LiDAR to estimate individual tree heights in forest stands. The advantages and disadvantages in the use of LiDAR systems are revised and a data fusion analysis with digital aerial photography is proposed. The work shows an example of these techniques in a forested area in Scotland. An algorithm has been devised to extract a high...

Due to recent advances in high-quality digital photography, taking a large series of images is very inexpensive. Especially in portrait situations, this results in a possible advantage because subjects often feel uncomfortable during acquisition. Selecting from a larger set of images increases the chance of a more satisfying outcome. However, the selection process is not easy and time consuming...

For the first time, the IWIPS conference will take place outside Europe, the US or Canada. Taking place this year in Southern Mexico, in the beautiful city of Mérida and its surroundings, this workshop is an opportunity to immerse oneself systematically into the richness and diverse variety of its culture. The workshop will use practices and techniques of visual ethnography in order to capture,...

Grassland vegetation can provide visual cover for terrestrial vertebrates. The most commonly used method to assess visual cover is the Robel pole. We test the use of digital photography as a more accurate and repeatable method. We assessed the digital photography method on four forage grassland species (Pseudoroegneria spicata, Festuca campestris, Poa pratensis, Achnatherum richardsonii). Digit...