spatial-frequency filter
spatial-frequency filter In remote sensing, a filter used to enhance the appearance of the spatial distribution of data in an image to make it more interpretable to the human eye. Spatial-frequency filters examine the spatial variations in digital number of an image and are used to modify the image by selectively suppressing or separating certain spatial-frequency ranges. Spatial-frequency filters include directional filter, high-pass filter, medium-pass filter, and low-pass filter. See also MEDIAN FILTER.
More From encyclopedia.com
Digital Image , digital image In remote sensing, an image in which the continuous variation in the scene being sensed is converted to discrete variation in the form… Pass , pass1 / pas/ • v. 1. [intr.] move in a specified direction: he passed through towns and villages the shells from the Allied guns were passing very lo… Electronic Filters , band-pass filter A filtering device that permits only those components in the frequency domain whose frequencies lie between two critical values to p… Image , im·age / ˈimij/ • n. a representation of the external form of a person or thing in sculpture, painting, etc. ∎ a visible impression obtained by a cam… Imaging , Imaging
High-tech diagnostic imaging techniques that have allowed physicians to explore bodily structures and functions with a minimum of invasion to… graven image , grav·en im·age • n. a carved idol or representation of a god used as an object of worship.
graven image an idol, in allusion to the second commandmen…
You Might Also Like
NEARBY TERMS
spatial-frequency filter