Development of an acquisition protocol and a segmentation algortihm for wounds of cutaneous Leishmaniasis in digital images

Kristians Diaz; Benjamín Castañeda; César Miranda; Roberto Lavarello; Alejandro Llanos

doi:10.1117/12.844534

12 March 2010 Development of an acquisition protocol and a segmentation algortihm for wounds of cutaneous Leishmaniasis in digital images

Kristians Diaz, Benjamín Castañeda, César Miranda, Roberto Lavarello, Alejandro Llanos

Author Affiliations +

Proceedings Volume 7623, Medical Imaging 2010: Image Processing; 76234L (2010) https://doi.org/10.1117/12.844534
Event: SPIE Medical Imaging, 2010, San Diego, California, United States

Abstract

We developed a protocol for the acquisition of digital images and an algorithm for a color-based automatic segmentation of cutaneous lesions of Leishmaniasis. The protocol for image acquisition provides control over the working environment to manipulate brightness, lighting and undesirable shadows on the injury using indirect lighting. Also, this protocol was used to accurately calculate the area of the lesion expressed in mm² even in curved surfaces by combining the information from two consecutive images. Different color spaces were analyzed and compared using ROC curves in order to determine the color layer with the highest contrast between the background and the wound. The proposed algorithm is composed of three stages: (1) Location of the wound determined by threshold and mathematical morphology techniques to the H layer of the HSV color space, (2) Determination of the boundaries of the wound by analyzing the color characteristics in the YIQ space based on masks (for the wound and the background) estimated from the first stage, and (3) Refinement of the calculations obtained on the previous stages by using the discrete dynamic contours algorithm. The segmented regions obtained with the algorithm were compared with manual segmentations made by a medical specialist. Broadly speaking, our results support that color provides useful information during segmentation and measurement of wounds of cutaneous Leishmaniasis. Results from ten images showed 99% specificity, 89% sensitivity, and 98% accuracy.

Citation Download Citation

Kristians Diaz, Benjamín Castañeda, César Miranda, Roberto Lavarello, and Alejandro Llanos "Development of an acquisition protocol and a segmentation algortihm for wounds of cutaneous Leishmaniasis in digital images", Proc. SPIE 7623, Medical Imaging 2010: Image Processing, 76234L (12 March 2010); https://doi.org/10.1117/12.844534

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available