Average retrieval rate of database according to the number of top retrieved images using NSCT.

<p>The Outex image database (5104 images) were used.</p

Comparison of retrieval performance of different types of metrics for texture image retrieval using NSCT on the Brodatz image database (1776 images of 111 different classes).

<p>Comparison of retrieval performance of different types of metrics for texture image retrieval using NSCT on the Brodatz image database (1776 images of 111 different classes).</p

Comparison of retrieval performance of different types of metrics for texture image retrieval using DT-CWT on the MIT image database (640 images of 40 different classes).

<p>Comparison of retrieval performance of different types of metrics for texture image retrieval using DT-CWT on the MIT image database (640 images of 40 different classes).</p

Average retrieval rate of database according to the number of top retrieved images using DT-CWT.

<p>The Outex image database (5104 images) were used.</p

Comparison of retrieval performance of different types of metrics for texture image retrieval using NSCT on the Outex image database (5104 images of 319 different classes).

<p>Comparison of retrieval performance of different types of metrics for texture image retrieval using NSCT on the Outex image database (5104 images of 319 different classes).</p

Two-level nonsubsampled contourlet transform decomposition.

<p>(a) NSFB structure that implements the NSCT (b) The obtained Frequency partitioning.</p

Comparison of retrieval performance of different types of metrics for texture image retrieval using DT-CWT on the Outex image database (5104 images of 319 different classes).

<p>Comparison of retrieval performance of different types of metrics for texture image retrieval using DT-CWT on the Outex image database (5104 images of 319 different classes).</p

Comparison of retrieval performance of different types of metrics for texture image retrieval using DT-CWT on the Brodatz image database (1776 images of 111 different classes).

<p>Comparison of retrieval performance of different types of metrics for texture image retrieval using DT-CWT on the Brodatz image database (1776 images of 111 different classes).</p

Average retrieval rate of database according to the number of top retrieved images using DT-CWT.

<p>The Brodatz image database (1776 images) were used.</p

Average retrieval rate of database according to the number of top retrieved images using DT-CWT.

<p>The MIT image database (640 images) were used.</p