Point Values

Overview

Point Values displays the coordinates and data value (intensity) for the point currently under the mouse. Optionally, it will display the x and y profiles of the data set through that point.

For a window in pseudocolor mode, the currently displayed wave will be the one whose data is reported. With truecolor mode, the user has control over which wave's point values will be reported (see the Wave topic for details). In the case that you want to see the values for more than one wave at the same time, simply run the Point Values utility once for each wave (however, because of a bug, displaying the profiles from more than one of these does not work well).

Topics

Overview | Window | Wave | Position | Intensity | Profiles

Related Priism Topics

Priism


Window

When the cursor is over an image, this field will contain the number of the window displaying that image. When the cursor is not on an image, this field is blank.

Topics

Overview | Window | Wave | Position | Intensity | Profiles


Wave

Use this option menu to select which wave's point values and profiles are reported when working with a data set with multiple wavelengths that are shown simultaneously in RGB mode. The current wave selection is shown as the label of the menu.

If the mouse enters a window in pseudocolor mode or a window in RGB mode which does not have the wave selected, the wave selection will automatically switch to the wave with the lowest index that is displayed.

Topics

Overview | Window | Wave | Position | Intensity | Profiles


Position

The position of the cursor in the data set is shown in the X, Y, Z, and T fields. The first column of numbers are the pixel coordinates, which in each dimension can range from zero to the number of points in that dimension minus one. The second column is the position in the coordinate system defined by the tilt angles, origin, and pixel spacing from the data set's header.

Topics

Overview | Window | Wave | Position | Intensity | Profiles


Intensity

The intensity (density, data value) at the point in the data set under the mouse is shown in the Intensity field. When the data is complex, the value is shown is the same quantity used to calculate the image - either the real component, imaginary component, amplitude, or phase.

Topics

Overview | Window | Wave | Position | Intensity | Profiles


Profiles

When the X profile toggle is on, a profile along x running through the point beneath the cursor is overlayed on the image. Similarly, when the Y profile toggle is on a profile along y is shown. Two straight lines, one vertical and one horizontal, mark the lines along which the profiles are taken.

By default, the plot is scaled so that the full range of values in the wavelength (these values are read from the dataset's header and are not recalculated) can be displayed in a region with one half the height of the image (for the x profile) or one half the width of the image (for the y profile). To compress the width and height, use the Page Down key that's not on the numeric keypad or the nine key on the main keyboard. To expand the plot, use the Page Up key or the zero key.

Topics

Overview | Window | Wave | Position | Intensity | Profiles