Edit Patch Object
Photo4D provides an object type, i.e., Patch, that enable users to quickly
build a surface mesh containing a large number of triangles:
- Select the Model page in the Main Window
and then the Patch subpage in the Model page.
- To create a new patch object, type in a name in the "Current Object"
field in the Model page and press . This starts the process for
creating a new Patch object:
Photo4D will first pop up a dialog box asking for a working image. A
patch object can only use points that appears in one image. Therefore,
users need to specify which image to use for the new patch.
Then, another dialog box will pop up asking for a texture image. If
there is no need for texture mapping, press the "Cancel" button in the
dialog. Otherwise, select an image and press "Ok".
- Select points in the working image that will be used for the patch.
The "Preview" button in the Model page of the Main Window will update
the newly created patch in the Preview window.
The Patch object provides a way to exclude any
un-wanted triangles from its triangle mesh.
Note
To create 3D models, users have to first
mark all the feature points and
compute
their (x,y,z) coordinates. All the points that will be used in a model
should be valid, i.e., their 3D coordinates
properly computed.