ALL libraries (COBIB.SI union bibliographic/catalogue database)
13.
An improved digital image correlation calculation in the case of substantial lighting variation
Simončič, Samo ; Podržaj, Primož
In the last decade, digital image correlation (DIC) has become the most widely used non-contact technique for measuring full-field motion and deformation in image sequences. As permanent hardware ...improvements make it possible to readily obtain digital images with higher and higher resolutions at ever-increasing frame rates, the effi- ciency of image registration methods is becoming increas- ingly important. Another aspect of this problem is the desire to improve the accuracy of these methods, which in gen- eral implies additional computational time. This problem is addressed by applying the inverse compositional Gauss- Newton (IC-GN) algorithm, which is modified to include the parametric sum of squared differences (PSSD) corre- lation criterion. However, the classical IC-GN algorithm with the sum of squared differences (SSD) correlation cri- terion cannot be used in cases in which lighting variations are of considerable importance. In this paper, a solution to this disadvantage is presented. The lighting variation is directly included in the IC-GN minimization procedure, which reduces the additional calculation time. Moreover, this IC-GN algorithm does not need to re-evaluate and invert the Hessian matrix. This results in a more computa- tionally efficient algorithm. Experimental results show that the proposed algorithm is insensitive to the linear intensity variation in the target image; consequently, it has a faster convergence rate than the IC-GN algorithm with the zero- mean normalized sum of squared differences (ZNSSD) correlation criterion. As a result, computational time can be reduced by up to 30% in the case of convergence condition [ ] = 0 . 001. Owing to the above mentioned advantages of the proposed IC-GN algorithm, it could become a new standard for efficient and robust full-field displacement tracking in image sequences with varying lighting intensity.
It was not necessary to add the material to the shelf.
Bibliographic material was successfully added on shelf.
Adding bibliographical material on shelf was not successful.
Material is already on the shelf.
Permalink
URL:
Impact factor
Access to the JCR database is permitted only to users from Slovenia. Your current IP address is not on the list of IP addresses with access permission, and authentication with the relevant AAI accout is required.
Year
Impact factor
Edition
Category
Classification
JCR
SNIP
JCR
SNIP
JCR
SNIP
JCR
SNIP
Select the library membership card:
DRS,
in which the journal is indexed
Database name
Field
Year
Links to authors' personal bibliographies
Links to information on researchers in the SICRIS system
Subject headings in COBISS General List of Subject Headings
Select pickup location
The material from the parent unit is free. If the material is delivered to the pickup location from another unit, the library may charge you for this service.
