We have studied the large-scale beam breakup and filamentation of femtosecond pulses in a Kerr medium. We have experimentally monitored the formation of stable light filaments, conical emission, and interactions between filaments. Three major stages lead to the formation of stable light filaments: First the beam breaks up into a pattern of connected lines sconstellationd, then filaments form on...

Structure from Motion can be improved by using multicamera systems without overlapping views to provide a large combined field of view. The extrinsic calibration of such camera systems can be computed from local reconstructions using hand-eye calibration techniques. Nevertheless these approaches demand that motion constraints resulting from the rigid coupling of the cameras are satisfied which ...

This paper presents a sensor fusion system of cameras and a 2D laser sensorfor large-scale 3D reconstruction. The proposed system is designed to capture data on afast-moving ground vehicle. The system consists of six cameras and one 2D laser sensor,and they are synchronized by a hardware trigger. Reconstruction of 3D structures is doneby estimating frame-by-frame motion and accumulating vertica...

Fringe projection systems for contactless surface measurements are increasingly used in applications of industrial inspection, quality control, rapid prototyping, archaeology, and in medical applications. Such systems provide increasing accuracy together with shorter measurement time and increasing data volume. The demands of increasing data volume, accuracy, and measurement speed can be satisf...

Carotenoids in the peel of harvested citrus in creased following treatment with ethylene. Im proved color resulted primarily from an increase in the amount of an orange-red pigment, cryptoxanthin, and a red pigment, jg-citraurin. Tempera ture influenced pigment accumulation. At 65 °F and 75 °F, rapid accumulation of both cryptoxanthin and jg-citraurin resulted in highly colored fruit. At 85 °F,...

When experimenting with different graphics algorithms and their effects one has to write a lot of code in order to fully exploit today’s graphics hardware. Over the last years there have been some attempts to provide support for this recurring task. A well known example is the nVidia Effect Browser, which can be used as a testbed for numerous purposes. However it provides only limited support w...

patients with autoimmune pancreatitis show typical signs of hypervascularization in contrast-enhanced high mechanical index endoscopic ultrasound (CEHMI EUS) [1]. Contrast-enhanced low mechanical index endoscopic ultrasound (CELMI EUS) is a newly developed technique that should show a different contrast-enhancing effect. To explore the effect of CEHMI EUS (picture acquisition●" Fig. 1a and 1b) ...

A smooth surface imaged on the retina produces a smooth flow field. Thus, the visual system may group regions of smoothly varying flow to segment surfaces. We tested this idea by having observers perform a segmentation task on several stimuli that differed in their 3D interpretations but were all matched in the smoothness of their 2D flow fields. Performance varied across conditions with the be...