??? Attempt to reference field of non-structure array

Asked Apr 09 '15 at 09:02

Active Apr 09 '15 at 09:13

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I am working on an image retrieval project. It requires The VLFeat open source library which implements popular computer vision algorithms specializing in image understanding and local features extraction and matching. Even after successful implementation of VLFEAT toolbox I get the following error:

??? Attempt to reference field of non-structure array.
Error in ==> gm at 84 locs = fq.f(1:2,:);

fq is a struct with the N query features as returned by VLFEAT: contains of two elements:

fq.f is a 6xN matrix with the ellipsoids descriptors of each detected feature in the query.
fq.d is a MxN matrix with the M-dimensional features descriptors of each detected feature in the query.

'fq' is an input parameter to the main function 'gm' which carries out the image retrieval task between query image and the R reference images.

function [similarities]= gm(query_path,reference_paths,fq,fr,matches,K)

edited Apr 09 '15 at 09:13

sansuiso

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asked Apr 09 '15 at 09:02

Sushant Hiwale

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explain clearly with sample data and code – Karthick Rajan Apr 09 '15 at 09:03
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Could fq be empty when there are no features? – Navan Apr 09 '15 at 13:11
`dbstop if error` or set a breakpoint and *check* what fq is. Just suppose it's supposed to be a struct at that point... (Navan probably has it right). – nkjt Apr 09 '15 at 14:05
@Navan - I suspect that's the case. We won't know for sure because we don't have any code available. – rayryeng Apr 09 '15 at 15:20

??? Attempt to reference field of non-structure array

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