This program allows you to view and alter many of the parameters controlling how images are displayed in an image window. To view or change the default parameters that are used, use Priism's Preferences dialog.
Scale Graphics Display Range Geometry Matrix Display Step Increment Interpolate Zoom Buffer Image Show Image Show Graphics Scaling Algorithm Complex Data Wave Synching Scale Bar Width Color Length Direction Position
Priism | Image windows | Preferences
When an image window displays a section of data, the graphics from nearby z slices and time points can be included in the display. Let f1, f2, f3, and f4 be the four values shown in the "GrDisRange" field. Then the section with z index, z0, and time point index, t0, will include the graphics from sections whose z index is between z0 minus f1 and z0 plus f2 and whose time point index is between t0 minus f3 and t0 plus f4.
You can alter any of the values here to modify the window's geometry. The first two values in this field specify the x and y position of the lower lefthand corner of the monitor window, in pixels, as measured from the lower lefthand corner of the screen. The third and fourth values specify the width and height in pixels of the image window (including the associated menus and borders).
Use this field to split up the window into multiple images. The two numbers in this field set the number of columns and rows respectively. The images are displayed in order of increasing index from left to right and from bottom to top.
This field sets the number of sections skipped when moving to the next or previous section.
When on, enlarged images (zoom greater than one) are displayed using a bilinear interpolation. Otherwise, no interpolation is applied and a pixel value from the unenlarged image is used unmodified for a square set of pixels in the enlarged version.
When on, the data after scaling is stored to save time if the image needs to be redisplayed. To reduce the amount of memory used, you can turn off the buffering of the scaled data.
When off, images are not shown in the window. This can be useful if you just want to see the overlayed graphics. Typically, however, you will want the image display to be switched on.
When off, any graphics overlayed on the image are not shown (with the exception of the section number display). Typically, you will want the graphics switched on.
Two choices of scaling algorithm are offered. The Fast option uses a lookup table to speed the scaling process with the drawback that it becomes increasingly inaccurate for scaling floating point or complex data as the scaling exponent gets farther away from one. The Accurate option takes roughly twice as much time but accurately does the scaling in nonlinear cases. Generally, the Fast option is reasonable for most work.
When displaying complex data, the quantity displayed as an image intensity can be the real component, the imaginary component, the magnitude, or the phase (in radians) of the complex number. This menu allows you to select which of these options is used.
This pulldown gives you control over which section is displayed when you switch waves after changing the section displayed. With Same Z Section, when you change waves the z and time index of the data shown will not change: the different waves remain in sync. With Independent, when you change waves the data displayed will be the data that was last displayed for that wave: scrolling through the data in one wave has no effect on the section that will be displayed after you switch to displaying another wave. With Coupled, when you step forward in one wave, you will also step forward. This behavior is similar to what happens with Same Z Section; the difference is that the Coupled option doesn't force the z and time index to be the same when waves are switched.
Use this to control whether or not the scale bar, a line to indicate the physical dimensions of the image, is shown. The Label option currently just has the same effect as On.
This entry specifies the thickness of the scale bar in pixels.
Use this menu to select the color of the scale bar. The color options can be changed by using ChangeColors.
This field sets the length of the scale bar in terms of the physical units for dimensions the data set, i.e. angstroms for electron microscope data and microns for optical microscope data.
Toggles whether the scale bar is shown horizontally or vertically.
This field sets the x and y position of the scale bar, in pixels, as measured from the lower lefthand corner of the image window. For horizontal scale bars, this position is the center of the left edge of the scale bar; for vertical scale bars, this position is the middle of the bottom edge of the scale bar.
You can select the position of the scale bar by pressing the Select with Mouse button and then clicking on the desired position in the image window with the right mouse button.