The statistics are relatively accurate for 8-bit and 16-bit data but are only approximate for 32-bit data. Statistics which are approximate will be indicated by an asterisk (*) on the Statistics panel.
In addition to the above statistics, a larger view of the selected histogram will be displayed. This histogram differs from those on the Multi-Histogram Panel in that it is not always scaled to grey level values from 0 to 255. Instead the histogram displayed will be scaled according to the Data Type of the selected Image Plane.
The "Data Source" area of the panel allows the user to select data source, the minimum and maximum grey levels, and the minimum and maximum occurrence count on the histogram. If the user selects "From Video" then the histogram data will be calculated from the image currently in video; otherwise the histogram data will be calculated from the corresponding image on file.
The user can query the exact pixel count at a certain histogram value by clicking on the histogram at that position with the left mouse button. A message of the form "#### Pixels at value ###" will be displayed.
Due to memory limitation, for 32-bit real data, the histogram will be scaled using a bin size of 64K. This explains why the statistics for 32-bit data are only approximate.
The "Options" area of the panel allows the user to select the output filename, the file format, and the histogram title and labels, and to specify whether or not to print out the statistics.
The "Output Characteristics" area of the panel will vary depending on whether or not the user chooses ASCII or PostScript output. For the ASCII output this area allows the user to set up the minimum and maximum grey levels and the minimum and maximum occurrence count on the histogram. The user can choose to either print out the histogram or the histogram data in ASCII.
For PostScript output, the "Output Characteristics" area of the panel will also allow the user to define the output window on the page.
The "Paper" area of the panel is only available for PostScript output. This area will allow the user to set up the page size, orientation, and number of copies.