Graphics Reference
In-Depth Information
123D Catch Tips
The quality of the scan that you receive from 123D Catch is dependent on the
quality and consistency of the photos you provide. Here are some general
tips on how to select objects to Catch and how plan out your Catch so that
you obtain desirable results.
Objects to avoid
When choosing objects to scan using 123D Catch, avoid reflective sur-
faces (
Figure 9-4
), objects with glare and mirrored or transparent sur-
faces. These objects will not work well for generating 3D models. For
example, windows that are reflecting light will appear warped or bowed,
like funhouse mirrors. Transparent objects like eyeglasses will appear as
holes in the model.
Figure 9-4.
Avoid shiny objects—they will not Catch well
Plan of attack
Before you start a capture project, plan out the order in which you will
take your photos. It is also important to decide on a focal length. If pos-
sible, position the object that you want to catch on a table that you can
move around easily and remain equidistant from the object at all angles.
Planning out how you will approach your subject is the key to success
when using 123D catch.
Mark your territory
Consider using some sort of marking system when your subject lacks
discernible features or is highly symmetrical. 123D Catch has trouble
with symmetrical objects and makers will help the application to register
different sides of the object. You will need four points for registration
between any one image and two other images in the collection. Consider
placing high contrast tape or sticky notes on a large object. Place enough
markers so that at least four are always visible from any of the positions
you plan to shoot from.
Utilize background objects
When possible, utilize background objects around the object you are
capturing. This will help the software parse depth. 123D Catch does not
like a blank wall background with flat paint. Do not attempt to Catch
