Comparison with state of the arts on KTH.

<p>Comparison with state of the arts on KTH.</p

ROC and AUC of TJU with different hidden states.

<p>ROC and AUC of TJU with different hidden states.</p

Action category-wise comparison among HL-HCRF, LL-MTCRFs, ML-MTCRFs, and All-MTCRFs on KTH, TJU, and MDA.

<p>Action category-wise comparison among HL-HCRF, LL-MTCRFs, ML-MTCRFs, and All-MTCRFs on KTH, TJU, and MDA.</p

The confusion matrixes of All-MTCRFs on KTH, TJU, and MDA.

<p>The confusion matrixes of All-MTCRFs on KTH, TJU, and MDA.</p

Graph structure of MTCRFs.

<p>Graph structure of MTCRFs.</p

ROC and AUC of MDA with different hidden states.

<p>ROC and AUC of MDA with different hidden states.</p

ROC and AUC of KTH with different hidden states.

<p>ROC and AUC of KTH with different hidden states.</p

Samples from KTH (a), TJU (b), and MDA (c).

<p>Samples from KTH (a), TJU (b), and MDA (c).</p

Performance Comparison on KTH, TJU, and MDA (%).

<p>Performance Comparison on KTH, TJU, and MDA (%).</p

Partwise spatio-temporal action unit sequence.

<p>Note that *,×,+,o respectively denote the space-time interest points in different part areas. Different colors denote different body parts.</p