Discovery - University of Dundee - Online Publications

Library & Learning Centre

Discriminating dysplasia

Discriminating dysplasia: optical tomographic texture analysis of colorectal polyps

Research output: Contribution to journalArticle

View graph of relations


Research units


Original languageEnglish
Pages (from-to)57-69
Number of pages13
JournalMedical Image Analysis
Issue number1
Early online date20 Aug 2015
StatePublished - Dec 2015


Optical projection tomography enables 3-D imaging of colorectal polyps at resolutions of 5-10 μm. This paper investigates the ability of image analysis based on 3-D texture features to discriminate diagnostic levels of dysplastic change from such images, specifically, low-grade dysplasia, high-grade dysplasia and invasive cancer. We build a patch-based recognition system and evaluate both multi-class classification and ordinal regression formulations on a 90 polyp dataset. 3-D texture representations computed with a handcrafted feature extractor, random projection, and unsupervised image filter learning are compared using a bag-of-words framework. We measure performance in terms of error rates, F-measures, and ROC surfaces. Results demonstrate that randomly projected features are effective. Discrimination was improved by carefully manipulating various important aspects of the system, including class balancing, output calibration and approximation of non-linear kernels.


Student Thesis

Download statistics

No data available


Open Access permissions



  • Author Accepted Manuscript

    Accepted author manuscript, 4 MB, PDF-document

    Copyright 2015 This manuscript version is made available under the CC-BY-NC-ND 4.0 license

  • Open Access Availability

    83 KB, PDF-document



Library & Learning Centre

Contact | Accessibility | Policy