Mark Image

The primary goal of a Photo4D project is to obtains the (x,y,z) coordinates of feature points on the object to be digitized. To tell Photo4D what points on the object need to be measured, users need to mark the feature points in the images. This step is called marking.

Marking needs to be done in the Marking Mode. This means that you need to select the Mark Page in the Main Window.

Topics related to marking are:

• The concepts of Feature Point, Point, and Mark;
• How to edit marks manually;
• How to Check Marks to make sure they are correct;
• How to use the Mark Traversal feature for marking and checking correctness;
• How to use the auto-marking features such as Detect, Adjust, and Auto-marking (applies to Photo4D-Pro only);
• How to back-project points to an image (applies to Photo4D-Pro only).

Marking is a key step in a Photo4D project. It is very important to ensure the correctness of all the marks.