3 ImageModelerTM User Guide
Placing a corner constraint ....................................................................................................58 Adding distance constraints .................................................................................................59 Adding planar constraints .....................................................................................................59 Adding survey point constraints .........................................................................................60 To set a survey point constraint: ..................................................................................61 Deleting a constraint ...............................................................................................................62 Modifying the Magnifier window .......................................................................................62
Evaluating the calibration in multi-image projects.....................................................63 Understanding the residual value ......................................................................................64 Filtering and Sorting Locators in the Scene Browser ...................................................65
Improving the calibration.....................................................................................................65 What do you do if the calibration is poor? .......................................................................65 Adjusting the position of markers ......................................................................................66 Changing the Quality Threshold .........................................................................................66
Running the calibration manually ......................................................................................67 About cameras...........................................................................................................................68 Non-linear distortion ...............................................................................................................69
Creating and modifying camera devices .........................................................................69 Creating a new camera device .............................................................................................70 Assigning a camera device to a shot .................................................................................71 Modifying a camera device ...................................................................................................71 Specifying the focal length ............................................................................................71 Specifying the lens distortion .......................................................................................72 Advanced Specification—setting the principal point .........................................73 Specifying the film back size .........................................................................................73 Specifying the film back aspect ratio .........................................................................74
Navigating in 3D space...........................................................................................................74 Interactive shot matching ......................................................................................................74 Locking and unlocking a view .............................................................................................76 Framing the viewport contents ...........................................................................................76
Chapter 4
Calibrating Cameras in Single-Image Projects...................................... 77