Our High-Dynamic-Range (HDR) world is the result of nonuniform illumination. We like to believe that 21st century technology makes it possible to accurately reproduce any scene. On further study, we find that scene rendition remains a best compromise. Despite all the remarkable accomplishments in digital imaging, we cannot capture and reproduce the light in the world exactly. With still further...

Ocular fundus imaging plays a key role in monitoring the health status of the human eye. Currently, a large number of imaging modalities allow the assessment and/or quantification of ocular changes from a healthy status. This review focuses on the main digital fundus imaging modality, color fundus photography, with a brief overview of complementary techniques, such as fluorescein angiography. W...

PURPOSE To evaluate a spectral imaging technique to detect the area of internal limiting membrane (ILM) peeling after vitrectomy for idiopathic macular hole. MATERIALS AND METHODS In a prospective study, 15 eyes of 15 patients with idiopathic macular holes were tested. After vitrectomy with ILM peeling, retinal images were taken with color fundus photography, red-free fundus photography, and ...

A fundamental problem in digital photography is the estimation of scene colorimetry from raw DSC image data. Currently, a standard is under development in this area (ISO 17321-2). In the development of this standard, few subjective experiments have been carried out until now relating to the estimation of scene colorimetry from noncolorimetric raw data, where no assumptions are made concerning t...

Yellow, white, and blue sticky cards were tested in an avocado orchard for their attractiveness to Scirtothrips perseae, Frankliniella occidentalis and Franklinothrips orizabensis. Clear pieces of plastic coated with adhesive were used as controls to determine rates of random interception of thrips independent of color. Yellow was most attractive to S. perseae and white cards captured mostly F....

The background for this work was the wish of a German photographic magazine to have a method for measuring the colour reproduction quality of digital still picture cameras, as well as their ability to be integrated in a colour management workflow. With scanners, characterisation is less difficult because they always use the same light source, and the colours in the photographic materials that a...

We propose a new approach to semi-automated delineation of curvilinear structures in a wide range of imaging modalities. Earlier approaches lack robustness to imaging noise, do not provide accurate radius estimates for the structures and operate only on single channel images. In contrast, ours makes use of the color information, when available, and generates accurate and smooth paths with minim...