some problem with ViPER-PE

[yanxia zhang]

Hi guys,

I am using ViPER-PE to evaluate the performance of my tracking system.
The ground truth is coming from annotaion via ViPER-GT. The result are
coming from my own algorithm which is in ViPER format. I am using
the same equiv.epf object-Person.epf properties.pr files as
provided in this example:

http://groups.google.com/group/viper-toolkit/browse_thread/thread/cad992c8008ce84e?pli=1

I can not get results of tracking evaluation. Can someone help me on
this? Here is the error message.

C:\My Dropbox\viper-light-20090911>java -jar viper-pe.jar -epf object-
Person.epf
-g 03_26_14_08Annotation.xgtf -r 03_26_14_08Result.xml -pr
properties.pr -o 03_26_14_08.out -raw 03_26_14_08.raw

OUTPUT:

****** NOTE: All output directed to: testoutRecovered.out ******
11:18:17 Parsing Target Config information.
11:18:17 Parsing Candidate Config information.
11:18:17 Parsing Evaluation Parameter information.
11:18:17 Parsing target data.
Unexpected data type (not lvalue): data:lvalue
........................................
11:18:17 Parsing candidate data.
Unexpected data type (not lvalue): data:lvalue
........................................
11:18:17 Generating comparison matrix for Object Evaluation
........................................11:18:17 Performing
evaluation.
.................................................................
11:18:18 Generating comparison matrix for Framewise Evaluation
........................................11:18:18 Performing
evaluation.
.........................................
11:18:21 Generating comparison matrix for Tracking Evaluation
........................................11:18:21 Performing
evaluation.
java.lang.ArrayIndexOutOfBoundsException: -98
at viper.descriptors.attributes.Attribute.getValue(Unknown
Source)
at viper.comparison.distances.Distances.helpGetDiff(Unknown
Source)
at
viper.comparison.TrackingEvaluation.getTrackingInformation(Unknown So
urce)
at viper.comparison.TrackingEvaluation.printEvaluation(Unknown
Source)
at
viper.comparison.CompEvaluator.printEvaluationResults(Unknown Source)

at viper.comparison.ViperPE.run(Unknown Source)
at viper.comparison.ViperPE.main(Unknown Source)

Usage: ViperPE [OPTIONS] [ -g <GT file>]
Unknown error message: -1
For more detailed documentation, peruse the docs directory.

Report bugs to viper...@cfar.umd.edu

Many thanks,

Yanxia

[David Mihalcik]

It looks like the section of code is trying to load data from an
attribute that doesn't exist on the requested frame. Maybe it is
looking for an attribute value on a frame that is outside of its
range? Either that or there is a but in how viper-pe tracks frame
offsets on dynamic attributes.

In the data files, you will see that everything is arranged into
objects, which have attributes, like so:

<object framespan="1:74" id="0" name="Person">
<attribute name="Location">
<data:bbox framespan="1:1" height="113" width="59"
x="215" y="76"/>

The framespan of the data elements in the attributes must be within
the framespan of the parent object.

viper-pe should be able to recover from this, so I suspect it might be
an error in the code, instead.

Dave Mihalcik

On Nov 11, 9:15 am, yanxia zhang <yazhang2...@gmail.com> wrote:
> Hi guys,
>
> I am using ViPER-PE to evaluate the performance of my tracking system.
> The ground truth is coming from annotaion via ViPER-GT. The result are
> coming from my own algorithm which is in ViPER format. I am using
> the same  equiv.epf   object-Person.epf  properties.pr files as
> provided in this example:
>

> http://groups.google.com/group/viper-toolkit/browse_thread/thread/cad...

> Report bugs to viper-b...@cfar.umd.edu
>
> Many thanks,
>
> Yanxia