Distortion correction in wide-angle images for picture-based food portion size estimation

Author

Zhaoxin Li ; Mingui Sun ; Hsin-Chen Chen ; Jie Li ; Kuanquan Wang ; Wenyan Jia

Author_Institution

Sch. of Comput. Sci. & Technol., Harbin Inst. of Technol. (HIT), Harbin, China

fYear

2012

fDate

16-18 March 2012

Firstpage

424

Lastpage

425

Abstract

We have previously shown that food portion size can be measured using a wearable camera. Since the pictures of food are taken unintentionally in this case, a wide-angle lens is necessary to obtain a larger field of view. As a result, there is a considerable distortion in food images. This paper investigates an image undistortion method to improve the accuracy in food portion size estimation. We use a division model to represent the distortion effect of the wide-angle lens. Our experiment indicates that this method reduces the estimation error significantly.

Keywords

biomedical equipment; cameras; image registration; medical image processing; patient monitoring; photographic lenses; distortion correction; estimation error; image undistortion method; picture-based food portion size estimation; wearable camera; wide-angle imaging; wide-angle lens; Accuracy; Cameras; Estimation; Lenses; Solid modeling; Three dimensional displays; Volume measurement;

fLanguage

English

Publisher

ieee

Conference_Titel

Bioengineering Conference (NEBEC), 2012 38th Annual Northeast

Conference_Location

Philadelphia, PA

ISSN

2160-7001

Print_ISBN

978-1-4673-1141-0

Type

conf

DOI

10.1109/NEBC.2012.6206922

Filename

6206922