Joint sparse coding based spatial pyramid matching for classification of color medical image. (April 2015)

• Record Type: Journal Article
• Authors: Shi, Jun; Li, Yi; Zhu, Jie; Sun, Haojie; Cai, Yin
• Is Part Of: Computerized medical imaging and graphics. Volume 41(2015)
• Page Start: 61
• Page End: 66
• Publication Date: 2015-04
• Subjects: Joint sparse coding -- Spatial pyramid matching -- Color medical image -- Classification; Diagnostic imaging -- Periodicals; Imaging systems in medicine -- Periodicals; Diagnosis, Radioscopic -- Data processing -- Periodicals; Diagnostic Imaging -- Periodicals; Imagerie pour le diagnostic -- Périodiques; Diagnostic imaging; Periodicals; Electronic journals; Electronic journals; 616.0754
• DOI: 10.1016/j.compmedimag.2014.06.002
• Languages: English
• ISSNs: 0895-6111

Abstract

Abstract: Although color medical images are important in clinical practice, they are usually converted to grayscale for further processing in pattern recognition, resulting in loss of rich color information. The sparse coding based linear spatial pyramid matching (ScSPM) and its variants are popular for grayscale image classification, but cannot extract color information. In this paper, we propose a joint sparse coding based SPM (JScSPM) method for the classification of color medical images. A joint dictionary can represent both the color information in each color channel and the correlation between channels. Consequently, the joint sparse codes calculated from a joint dictionary can carry color information, and therefore this method can easily transform a feature descriptor originally designed for grayscale images to a color descriptor. A color hepatocellular carcinoma histological image dataset was used to evaluate the performance of the proposed JScSPM algorithm. Experimental results show that JScSPM provides significant improvements as compared with the majority voting based ScSPM and the original ScSPM for color medical image classification.