Mark Page

The Mark page in the Main Window is for marking feature points in Image windows. The Mark page helps users edit marks in many ways:

1. Selecting the Mark page set Photo4D to the marking mode, which enables you to use the mouse for editing points and marks in the Image windows.
2. The Mark page supports the mark traversal function which provides a batch mode for marking and for checking the correctness of marks.
3. Photo4D-Pro has automated marking capabilities. It can detect and mark points that have been tagged, it can adjust the position of marks, and it can automatically mark additional images based on one that is already marked.
4. The Mark page is also used to back-project points to an image for texture mapping. The mark page contains some elements and subpages. The fields are:
   • Reference Image: All images are displayed in the pull-down list next the the reference image field. A reference image can be selected by clicking on an image name in the list. A reference image is used in the Traversal, Mark, and Proj. subpages.
   • Working Image: All images are displayed in the pull-down list next the the reference image field. A working image can be selected by clicking on an image name in the list. A working image is used in the Adjust, Detect, Mark, and Proj. subpages.
   • Mask size: A small square measured in pixels used for tracking. Change this value to reflect the size of feature points appearing in the videos.
   • Use color: Used to switch a color image to gray scale.

   The subpages are:
   1. The Traversal subpage is used to perform mark traversal;
   2. The Adjust subpage is used for auto-adjustment of marks (Photo4D-Pro only);
   3. The Detect subpage is for auto-detection of marks (Photo4D-Pro only);
   4. The Mark subpage is used for automatically marking images (Photo4D-Pro only), and;
   5. The Proj, or Back-Projection, subpage is used for texture mapping with back-projection (Photo4D-Pro only).

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