dispev | matching algorithm for stereoscopic DISParity EValuation | Computer Vision library
kandi X-RAY | dispev Summary
kandi X-RAY | dispev Summary
dispev is a C++ implementation of the matching algorithm for stereoscopic DISParity EValuation described in A two-stage correlation method for stereoscopic depth estimation by Nils Einecke, and Julian Eggert (DICTA, page 227-234. IEEE Computer Society, 2010). Algorithm implementation uses OpenCV 2.4.10 and it is preconfigured for being compiled with Visual Studio 2010. All the required dependancy files are included in the zip file (version x64, vc10). "bin/" folder contains a precompiled version of the code and a .bat file for running the algorithm in some test images. A Matlab file is provided for analysing the results.
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QUESTION
I feel like I am probably missing something very basic, but I'll ask anyway.
There is input topic with multiple partitions. I'm using selectKey as part of DSL topology. The selectKey always returns the same value. My expectation is that after internal re-partitioning triggered by selectKey() the next processor in the topology will be called on the same partition for the same key. However the next processor that is transform() is called on different partitions for the same key.
Topology:
...ANSWER
Answered 2019-Feb-14 at 07:54For process()
, transform()
, and transformValues()
there is no auto-repartitioning. You will need to insert a manual through()
call to repartition the data. If you compare the JavaDocs (with groupBy()
or join()
that support auto-repartitioning) you see that auto-repartitioning is not mentioned for them.
The reason is, that those three methods are part of Processor API integration into the DSL, and thus no DSL operators. Their semantics are unknown and thus we cannot tell if they require repartitioning if the key was change or not. To avoid unnecessary repartitioning, auto-repartitioning is not performed.
There is also a corresponding Jira: https://issues.apache.org/jira/browse/KAFKA-7608
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