Regularization in global sound equalization based on effort variation.

Power-output regularization in global sound equalization (L)

Increasing the Robustness of Acoustic Multichannel Equalization by Means of Regularization

The performance of acoustic multichannel equalization techniques, which are based on estimating and inverting the room impulse responses (RIRs) between the source and the microphone array, is known to be very sensitive to estimation errors of the RIRs. In order to increase the robustness, it has been proposed to use regularization with the aim of decreasing the energy of the inverse filters. Th...

DRAFT MANUSCRIPT PREPARED FOR SUBMISSION TO THE 21ST INTER- NATIONAL CONGRESS ON ACOUSTICS, MONTREAL, 2-7 JUNE 2013 The influence of regularization on anechoic performance and robustness of sound zone methods

Recent attention to the problem of controlling multiple loudspeakers to create sound zones has been directed towards practical issues arising from system robustness concerns. In this study, the effects of regularization are analyzed for three representative sound zoning methods. Regularization governs the control effort required to drive the loudspeaker array, via a constraint in each optimizat...

Illumination Invariant Facial Pose Classification

In this paper, we compared the performance of various combinations of edge operators and linear subspace methods to determine the best combination for pose classification. To evaluate the performance, we have carried out experiments on CMU-PIE database which contains images with wide variation in illumination and pose. We found that the performance of pose classification depends on the choice o...

A Variational Histogram Equalization Method for Image Contrast Enhancement

The main aim of this talk is to discuss a histogram equalization algorithm for image contrast enhancement. Our idea is to propose a variational approach containing an energy functional to determine a local transformation such that the histogram can be redistributed locally, and the brightness of the transformed image can be preserved. In order to minimize the differences among the local transfo...