
trecvid_inf.mat contains informations for compiling a-TRECVID dataset

trecvid_inf = 

         att_name: {500x1 cell}            500 attributes names
             path: {266473x1 cell}         path of the 266,473 images
    query_att_idx: [1x126 double]          index of 126 attributes used
       video_name: {1x11640 cell}          name of videos
      video_label: [1x266473 double]       video labels for the 266,473 images
     train_idx_2000: [1x2000 double]			 index of 2000 images for training
     train_idx_4000: [1x4000 double]	     index of 4000 images for training
     train_idx_6000: [1x6000 double]		   index of 6000 images for training
     train_idx_8000: [1x8000 double]       index of 8000 images for training
    train_idx_10000: [1x10000 double]      index of 10000 images for training

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You will need TRECVID 2011 SIN dataset in order to get a-TRECVID: http://www-nlpir.nist.gov/projects/tv2011/tv2011.html#sin. The dataset is available to all the participants of TRECVID SIN task. However it cannot be redistributed outside the participants' groups. Please email yuxinnan@ee.columbia.edu for the data.
You will also need to download the TRECVID 2011 collaborative annotation http://mrim.imag.fr/tvca/ in order to get the attribute labels. 
Please email yuxinnan@ee.columbia.edu if you have encountered any problems. 

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We used the following weak attribtues for experiments:
1. 126 query attribute classifier scores.
	trained with liblinear with C = 1 http://www.csie.ntu.edu.tw/~cjlin/liblinear/
2. 2,659 classemes scores
	http://www.cs.dartmouth.edu/~lorenzo/projects/classemes/
3. 2,000 discriminative attributes
	As described in A. Farhadi, I. Endres, D. Hoiem, and D.A. Forsyth, ¡°Describing Objects by their Attributes¡±, CVPR 2009, and our CVPR2012 paper
4. 1,215 random projection and latent variables
	Refer to our CVPR2012 paper.

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Please cite the following papers when using the data/code:
Felix X. Yu; Rongrong Ji; Ming-Hen Tsai; Guangnan Ye; Shih-Fu Chang.
Weak attributes for large-scale image retrieval, CVPR 2012

Please also consider to cite our technical report covering more experiments:
Felix X. Yu; Rongrong Ji; Ming-Hen Tsai; Guangnan Ye; Shih-Fu Chang.
Experiments of image retrieval using weak attributes, Technical Report # CUCS 005-12

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Report questions to Felix X. Yu: yuxinnan@ee.columbia.edu
