spurious resolution

resolution, spurious

If the contrast sensitivity function (CSF) is measured when the eye is not in focus for the grating (e.g. due to a lack of correction or an erroneous correction), the CSF will suffer appreciably and fall much more rapidly with increasing spatial frequency towards zero contrast sensitivity. At this point the grating can no longer be resolved and appears a uniform grey. At spatial frequencies greater than this threshold value there may occur a phenomenon known as spurious resolution in which the CSF rises above zero. Thus, the grating may become visible again at higher spatial frequencies than that at which it first disappeared. Example: spurious resolution can be observed when looking at a radial grating (or star sector target) in which the spatial frequencies increase towards its centre. If the grating is held close to the eye with the accommodation relaxed one can see a grey annulus (and sometimes two) separating a zone (or two) of spurious resolution. See contrast sensitivity function.

单词	spurious resolution
释义	spurious resolution resolution, spurious If the contrast sensitivity function (CSF) is measured when the eye is not in focus for the grating (e.g. due to a lack of correction or an erroneous correction), the CSF will suffer appreciably and fall much more rapidly with increasing spatial frequency towards zero contrast sensitivity. At this point the grating can no longer be resolved and appears a uniform grey. At spatial frequencies greater than this threshold value there may occur a phenomenon known as spurious resolution in which the CSF rises above zero. Thus, the grating may become visible again at higher spatial frequencies than that at which it first disappeared. Example: spurious resolution can be observed when looking at a radial grating (or star sector target) in which the spatial frequencies increase towards its centre. If the grating is held close to the eye with the accommodation relaxed one can see a grey annulus (and sometimes two) separating a zone (or two) of spurious resolution. See contrast sensitivity function.
随便看	energy spread energy star energystar energy star appliances and lighting energy star buildings energy star homes energy star indoor air package energy star products energy star program energy star rating energy star window standard energy state energy steering group energy stock energy storage energy storage device energy storage north america energy storage research group energy storage system energy-storing energy-storingly energy storing prosthetic foot energy strategy report energy studies in buildings laboratory energy studies review