Experimental Comparison of Correlation Techniques
نویسندگان
چکیده
This paper presents an experimental comparisons of different forms of SSD and normalised cross correlation of image neighborhoods. Signal detection theory is used as a framework for analysis of correlation techniques. A sum of squared difference (SSD) of two image neighborhoods is shown to provide an optimal matching measure for tracking and registration. Correlation of the image, its gradient magnitude or its Laplacian are discussed. The relations between SSD and Cross Correlation are demonstrated, and different normalisation techniques are described. An experimental comparison is made of SSD, Normalized Cross Correlation, and Zero-Mean normalised cross correlation, in the presence of changes in light level, additive Gaussian noise, salt and pepper noise, and changes in the mask size.
منابع مشابه
Comparison of Correlation Techniques
This paper presents a theoretical and experimental comparison of different forms of SSD and normalised cross-correlation of image neighborhoods. Signal detection theory is used as a framework for analysis of correlation techniques. A sum of squared difference (SSD) of two image neighborhoods is shown to provide an optimal matching measure for tracking and registration in the case fo additive Ga...
متن کاملRole of social comparison orientation and tendencies in Iranian EFL learners academic achievement
Social Comparison is important as it can be either encouraging or discouraging for the person who makes it. Although studies concerning social comparison in the classroom context abound, few deal with the relationship between the role of social comparison orientation and tendencies in academic achievement in a competition based educational context. Adopting a non- experimental ex-post facto des...
متن کاملThe Effect of Textual Enhancement Techniques on the Acquisition of Passive Form
This experimental study evaluated the possible effects of textual input- based enhancement on the acquisition of passive form on Iranian pre-intermediate EFL learners. Sixty Iranian EFL learners at the pre-intermediate level of proficiency were randomly assigned into three groups; two experimental group and one comparison group. The first experimental group received passages in which the passiv...
متن کاملPrediction of Nitrogen Injection Performance in Conventional Reservoirs Using the Correlation Developed by the Incorporation of Experimental Design Techniques and Reservoir Simulation
Enhanced oil recovery using nitrogen injection is a commonly applied method for pressure maintenance in conventional reservoirs. Numerical simulations can be practiced for the prediction of a reservoir performance in the course of injection process; however, a detailed simulation might take up enormous computer processing time. In such cases, a simple statistical model may be a good approach to...
متن کاملA comprehensive experimental comparison of the aggregation techniques for face recognition
In face recognition, one of the most important problems to tackle is a large amount of data and the redundancy of information contained in facial images. There are numerous approaches attempting to reduce this redundancy. One of them is information aggregation based on the results of classifiers built on selected facial areas being the most salient regions from the point of view of classificati...
متن کامل