OEBLUNDER

Description

OEBLUNDER automatically detects and removes errors, or blunders in images, and with tie points (TP), and ground control points (GCP) in a CATALYST Professional OrthoEngine project file (*.prj).

Parameters

oeblunder(oeproji, oeprojo)

Name	Type	Caption	Length	Value range
OEPROJI*	str	Input OrthoEngine project file	1 -
OEPROJO*	str	Output OrthoEngine project file	1 -

* Required parameter

Parameter descriptions

OEPROJI

The path and file name of the input OrthoEngine project file.

OEPROJO

The path and file name of the output OrthoEngine project file.

Note: If you specify your input project as your output project, then the input OrthoEngine project is updated with the recalculated math models, as applicable.

Return Value

Returns: Execution status

Type: PCI_INT

The return value is 0. This function returns only if it executes successfully; otherwise, it throws an exception.

Details

OEBLUNDER detects and eliminates blunder points and images in an OrthoEngine project file.

The algorithm eliminates items from the project based on the following logical tests:

Images with duplicate IDs
TPs with duplicate IDs
TPs with the same image coordinates
TPs with only a single ray (do not overlap with other images)
GCPs with duplicate IDs
GCPs with the same image or ground coordinates

With some supported types of math models, such as airphoto, RPC, and ADS, an additional blunder-removal step is performed after removing the logical blunders. In this step, the root mean square (RMS) error is calculated for the entire project by using the input math model. Any points in the project in which the error value is equal to or greater than the total project error multiplied by five are eliminated.

Example

In the following example, OEBLUNDER is run to detect and remove blunders of TPs, GCPs, and images.

from pci.oeblunder import *

oeproji	=	"airphoto_model.prj"
oeprojo	=	"a.prj"

oeblunder (oeproji, oeprojo )

Environments	PYTHON :: EASI :: MODELER
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