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which the operation is selected is always the modified destination; an image (or sequence) associated with a different image
viewer window can be selected as the unmodified source.

The XCAP-Lite version only provides the

Patterns

and

Set

features.

5.2.5. Image Viewer - Measure

The image viewer window's

Measure

provides features for image measurement and analysis, including user-defined coordinate

systems and mapping intensities into user-defined units.

The

Intensity Calibration

allows creating a mapping (correspondence) from monochrome image pixel values into user-defined units,

for example from grey level into brightness, or grey level into density of material.

The

Spatial Calibration

allows creating a mapping (correspondence) from pixel X,Y coordinates into a user-defined H,V coordinate

system. The H,V coordinates may be translated, scaled, and/or rotated with respect to X,Y coordinates.

The

Histogram

computes and displays a graph of the image's histogram.

The

Mass & Moments

computes and displays various moments of the image.

The

Line Profile

displays a two dimensional graph of pixels values along an arbitrary oriented line, arc, polyline, Bezier, and other

curves.

The

Radial Mass Plot

displays a two-dimensional graph of the sum of pixel values versus the pixels' distance from an origin.

The

Ruler

overlays a ruler on the image, with user-defined length, width, and tick marks, all based on the H,V coordinate system.

Multiple rulers can be overlayed on each image.

The

Protractor

overlays a protractor on the image, with user-defined radius, arc, and tick marks, all based on the H,V coordinate

system. Multiple protractors can be overlayed on each image.

The

Cartesian Reticle

overlays a Cartesian coordinate reticle on the image, based on the H,V coordinate system. Multiple Cartesian

reticles can be overlayed on each image.

The

Polar Reticle

overlays a polar coordinate reticle on the image, based on the H,V coordinate system. Multiple polar reticles can

be overlayed on each image.

The

Distance & Angle Crosshairs

provides spatial calibration and measurement of absolute position, relative position, length and

angles. While these capabilities are also available elsewhere in

Image Viewer - Measure

and

Image Viewer - Draw

, the

Distance &

Angle Crosshairs

collects chosen features to provide a single window with the equivalent of a so-called ''Video Crosshair Overlay

& Measurement'' system.

The

Shape Analysis

provides descriptive statistics about the shape of elliptical, rectangular, or polygonal regions.

The

Blob Analysis

identifies image blobs, based upon thresholding the image into foreground and background, and provides

descriptive statistics about the blobs found.

The

Particle Tracking

provides identification and tracking of particles (blobs) over a sequence of images. Individual particles are

detected based upon a thresholded (bi-level) image. In one method, multiple image occurrences of a common particle are
identified across a sequence of images by position extrapolation and verification. In a second method, vectors of particles which
are close together are compared and expected to yield consistent magnitude and direction. In a third method, which requires the
fewest setup parameters, common particles are grouped by nearest neighbor. For any method, the particle's trajectories are
displayed and reported.

The

SubPixel Edger

overlays a line or curve tool on the image, analyzes the pixel values under the line or curve finding edges to

subpixel accuracy, and displays the position of the edges both graphically, on the image, and numerically.

The

Ellipse Fitter

overlays an elliptical pattern of subpixel edger tools on the image, and computes a best fit elliptical curve from

the edges found.

The

Correlation Finder

correlates, or matches, a kernel image over a larger image, showing the coordinates of, and displaying a box

around, the best match(es).