|PanGazer – overlays|
PanGazer uses ‘status’ text fields to show camera settings, etc. (see the settings page). In addition, it can overlay data on the image that are directly related to the image itself rather than being simply numerical values. Currently two overlays are available:
If the bearing or horizon is not known you can set it, as described below. Here is a view showing both overlays:
PanGazer lets you set where North is for any image. Once North is set PanGazer can show the bearing of the cursor and can also overlay compass points (‘N’, ‘S’, ‘SW’, etc.) to help give a sense of direction, as shown in the screenshot above.
Although drones know where they are and which direction they are pointing when images are captured (and often record those data), as far as I know no stitching application preserves that information. Therefore, to have compass directions shown correctly (as in the screenshot above) you must identify some point in the image that is due North (True North) of the camera position and then communicate that to PanGazer.
There are two ways to do this:
Once North is set, by either method, the compass points will then move appropriately as you change viewpoint and zoom. You can turn them off or on by clicking the Settings → Overlays → Show compass points menu item.
The tilt of the image is the vertical angle (pitch) of the centre of the image relative to the horizon (positive is above the horizon) with a range from −90 through +90 degrees. For spherical images the position of the horizon is fixed and is calculated from the geometry of the image (the bottom edge of the image is at −90 degrees). For all other images (360° or not) you can set, edit, or delete the horizon position.
To see the tilt angles, first ensure that Settings → Overlays → Show tilt angles is checked (this is off by default).
Like setting North, there are two ways to set the horizon position:
|PanGazer and these web pages were written by Mike Cowlishaw; Please send me any corrections, suggestions, etc.|
All content © Mike Cowlishaw, 2014–2018,
except where marked otherwise. All rights reserved. The pages here,
and the PanGazer program, are for non-commercial use only.
This page was last updated on 2018-12-12 by mfc.