I presume that the image field is a binary field, right?
I can think of a couple of things that _may_ work for you:
1. You create a dummy token on the "image" field, and then store the
image data as a payload on that token. Then you can use the payload
mechanism to score the field by overriding the scorePayload (I think
that's the name) method in the Similarity class. You may have to
implement a new Query for this similar to BoostingTermQuery (but
maybe not)
2. You could implement scoring of binary fields in Lucene. I've had
in my mind that a binary field is the same as a payload, more or
less, so it seems like it would be relatively easy to create a query
mechanism for it, just not sure of the loading part of it at this
time (but that should be easy enough to figure out)
I don't know how the performance of either of these approaches would
be. If you have large images, it could be a significant overhead.
The other option, of course, is to do postprocessing on the results
by first narrowing down on the text fields and then scoring the images.
-Grant
On Oct 6, 2007, at 1:03 AM, [EMAIL PROTECTED] wrote:
Thank you Grant but FuntionQuery doesnt solve the
problem. Looks like I didnt explain the problem
properly. Let me try it again:
1. We have a document in which there are 4 text fields
and a image field.
2. We have a special algorithm to perform match based
on the image. In the sense, if 2 images are provided,
the algorithm can determine with a match result and a
score (which indicates likelihood of match)
We want to know how we can integrate the "image
matching" algorithm into Lucene/Solr.
The search will happen through API only where the
image is passed and matched images from the index
needs to be given back as result.
Wanted to understand if we could achieve the
integration of this with Lucene/Solr so that both
search on text fields and images can happen.
Would be nice to hear your thoughts.
cheers
Prakash
Grant Ingersoll <[EMAIL PROTECTED]> wrote:
You may want to look at the FunctionQuery capability,
either in
Lucene, or the expanded capabilities (recently added)
in Solr.
-Grant
On Oct 4, 2007, at 2:39 PM, [EMAIL PROTECTED] wrote:
Hi,
Were planning to use Lucene or Solr within our
application and wanted to know if it can support the
following:
Scenario:
We have (say) 5 fields in a document which need to
be
indexed. 4 fields are indexed by Lucene. The 5th
field
is not indexed as it has data that cant be indexed
or
searched by Lucene.
We have a special algorithm/API to search/match on
the
5th field. Can this algorithm/API be integrated
within
Lucene/Solr so that if we pass the 5th field data as
a
query, the search engine will use our algorithm/API
to
search and return/display the results. The reason
why
we want this to be integrated with Lucene/Solr are
obvious - rely on Lucene/Solr's basic scalability /
performance as well as integrate both traditional
searching capabilities and specialized searching for
our end-user
Is this possible to achieve in Lucene/Solr and if
so,
how. Would be nice to understand your thoughts as
this
is very critical for us.
Appreciate your help. thank you.
cheers
Prakash
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