histogram equalization
[digital image processing] The redistribution of pixel values in an image so that each range contains approximately the same number of pixels. A histogram showing this distribution of values would be nearly flat.
d.histogram does not erase the active frame before displaying output.
SEE ALSO
d.colors, d.colortable, d.erase, d.polar, g.region, r.stats, parser,
AUTHOR
Dave Johnson
DBA Systems, Inc.
10560 Arrowhead Drive
Fairfax, Virginia 22030 ...
View a histogram
Histograms graphically display the spread of cell value data within the selected cells of a raster grid layer. Histograms can be viewed in layer Properties.
Open the Properties for Calculation (Symbology > Classify).
Histograms and Scatter Plots
The purpose and value of histogram data plots have been discussed in Section 1.
Histograms for the county demographic data in Exercise 9c
The fields, in order, are: ...
Histogram and summary statistics
Normal quantile-quantile plot
Trend analysis
Semivariogram/Covariance cloud and map
Voronoi map
General quantile-quantile plot
Cross-covariance cloud and map ...
Histograms
The method explored in this article relies on cumulative histograms of C/[N.sub.0] values reported by a receiver in a homogeneous signal environment.
histogram
A graph showing the distribution of values in a set of data. Individual values are displayed along a horizontal axis, and the frequency of their occurrence is displayed along a vertical axis.
Histogram - A graph showing the relative values of attributes that are represented as bars.
HPGL (Hewlett Packard Graphics Language) - An industry standard for defining and generating vector graphics in geographic data processing.
The histogram to the right of the map view forms a different perspective of the same data. Rather than positioning the measurements in geographic space it summarizes their relative frequency of occurrence in data space.
Elevation histogram of the surface of the Earth - approximately 71% of the Earth's surface is covered with water.
For other uses, see Elevation (disambiguation).
Figure 7. Histograms showing differences in predicted depth of solute movement for MAPS/STATSGO and (a) MAPS/SSURGO, (b) ANUSPLIN/STATSGO, and (c) ANUSPLIN/SSURGO data inputs (from Wilson et al. 1996).
methods: histogram, voronoi map, normal QQplot, general QQPlot, trend analysis, semivariogram/covariance cloud, crosscovariance cloud) ...
The character of errors is best visualized by the histogram of differences of the true values and the network outputs. The figure 10 shows the error histogram of the training data set, the figure 11 the same for the testing data.
Scroll down along the left hand side and select Histogram to view the frequency and distribution of the different values.
Plotting a scattergram or histogram of the data can determine the shape of the distribution. A good knowledge of these basic statistical concepts is useful in classifying any data.
Lighting results can be numeric, grid values, graphical contours, shaded diagrams and histograms. Vertical luminance can be computed.
Image analysis tools - RGB mapping, numeric values display, and histograms.
Attribute table display - view and query the attributes associated with your data.
HTML online help - modern online help that's easy-to-use.
Line diagrams, bar graphs, histograms, pie graphs are normally used on maps. However, with the diagrams, there are too many distracting features and the image becomes complicated rather than conveying the information clearly (figure 8.3f).
Details of any post-processing undertaken on the data, such as noise reduction or sharpening with convolution filters, histogram equalisation, contrast adjustment etc.
Details of the rectification method(s) used ...
Other statistics (such as chi-square, confidence levels, or histograms) are usually not significant for lower-order engineering projects and become totally insignificant if the user is not well versed in statistics and adjustment theory.
A Triangulated Irregular Network (TIN) is a digital data structure used in a geographic information system (GIS) for the representation of a surface. ... Elevation histogram of the surface of the Earth †...
 See also: Map, Information, Image, Analysis, Area
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