In the article a method of compression of High Dynamic Range of Infrared images and its details enhancement was proposed. The method is based on aggregation of partial images with different ranges of pixel values generated on the basis of weighting function. Aggregation of images could be performed according to proposed scheme with use of the optimal algorithm selected by user. Preliminary resu...

If you are lurking on popular photo forums, you have probably noticed that some people say Nikon/Sony/Pentax/others have more dynamic range than Canon cameras [1, 2, 3]. The difference is visible in extreme lighting conditions when you try to bring shadow detail, the image from Canon dSLRs tends to get a bit noisier (Figure 1). Can we do something about it? YES. It’s all about how you are scann...

The discovery of hard X-ray sources near the top of a flaring loop by the HXT instrument on board the YOHKOH satellite represents a significant progress towards the understanding of the basic processes driving solar flares. In this paper we extend the previous study of limb flares by Masuda (1994) by including all YOHKOH observations up through August 1998. We report that from October 1991 to A...

A new image appearance model, designated iCAM06, was developed for High-Dynamic-Range (HDR) image rendering. The model, based on the iCAM framework, incorporates the spatial processing models in the human visual system for contrast enhancement, photoreceptor light adaptation functions that enhance local details in highlights and shadows, and functions that predict a wide range of color appearan...

This is a continuation of investigation of the spectral dynamic range achievable with the WIDAR correlator. Previous investigations (EVLA Memo 148) were limited by the so-called “splatter” phenomena, which is now understood and avoidable (EVLA Memo 157). This investigation is also stimulated by a desire to evaluate the “correlator chip beat artifact” seen in simulations (NRC-EVLA Memo 32) and t...

The discovery of hard X-rays from tops of flaring loops by the HXT of YOHKOH represents a significant progress in the understanding of solar flares. This report describes the properties of 20 limb flares observed by YOHKOH from October 1991 to August 1998, 15 of which show detectable impulsive looptop emission. Considering the finite dynamic range (about a decade) of the detection it can be con...

We present a tractable stochastic phase model of the temperature sensitivity of a mammalian cold receptor. Using simple linear dependencies of the amplitude, frequency, and bias on temperature, the model reproduces the experimentally observed transitions between bursting, beating, and stochastically phase-locked firing patterns. We analyze the model in the deterministic limit and predict, using...