The Bradford curves are used in the CIECAM97 colour appearance model, and are ‘sharpened’ in the sense that they have narrower support than the cone fundamentals. Spectral sharpening is a method which finds the linear combination of a set of sensors that is most sensitive to a given interval of the visible spectrum. Here we investigate the relationship between the apparently sharp Bradford curv...

Spectral sharpening of speech has been proposed as a possible method for improving speech understanding by listeners with hearing loss. Animal neural physiological data and cochlear models differ in their predictions as to the potential success of spectral sharpening for improved speech recognition. Data from early implementations of spectral sharpening are also ambiguous. Our recent investigat...

An inevitable tradeoff between spectral and spatial resolution exists in remote sensing systems and it is essential to integrate information from systems with complementary characteristics to improve data interpretability. Panchromatic (PAN) sharpening is a data fusion technique that merges a high spatial resolution PAN image with lower spatial resolution multispectral images. The resulting mer...

We develop sensor transformations, collectively called spectral sharpening, that convert a given set of sensor sensitivity functions into a new set that will improve the performance of any color-constancy algorithm that is based on an independent adjustment of the sensor response channels. Independent adjustment of multiplicative coefficients corresponds to the application of a diagonal-matrix ...

It has now been 20 years since the seminal work by Finlayson et al. on the use of spectral sharpening of sensors to achieve diagonal color constancy. Spectral sharpening is still used today by numerous researchers for different goals unrelated to the original goal of diagonal color constancy e.g., multispectral processing, shadow removal, location of unique hues. This paper reviews the idea of ...

Comb filters are a class of low-complexity filters especially useful for multistage decimation processes. However, the magnitude response of comb filters presents a droop in the passband region and low stopband attenuation, which is undesirable in many applications. In this work, it is shown that, for stringent magnitude specifications, sharpening compensated comb filters requires a lower-degre...

Contrast-sharpening is a fundamental feature of mammalian sensory perception. Whereas visual contrast-sharpening has been fully understood in terms of the retinal neuronal wiring [DeVries, S. H. & Baylor, D. A. (1993) Cell 72, Suppl., 139-149], a corresponding explanation of auditory contrast-sharpening is still lacking. Here, we show that the essentials of auditory contrast-sharpening can be e...