Perceptual methods

Perceptual methods for video coding

A survey of perceptual image processing methods

Perceptual approaches have been widely used in many areas of visual information processing. This paper presents an overview of perceptual based approaches for image enhancement, segmentation and coding. The paper also provides a brief review of image quality assessment (IQA) methods, which are used to evaluate the performance of visual information processing techniques. The intent of this paper...

Problem-Based and Lecture-Based Methods Compared: The Mediating Role of Perceptual Control and Value Cognition

  It is necessary to clarify factors affecting student emotions as they play an important role in their learning. Among such factors teaching method looms large, and given the variety of methods used, a comparison of these methods in terms of their relation to things like perceptual control and value cognition, can lead to a better choice in regards to helping the students learn better....

New Iterative Geometric Methods for Robust Perceptual Image Hashing

We propose a novel and robust hashing paradigm that uses iterative geometric techniques and relies on observations that main geometric features within an image would approximately stay invariant under small perturbations. A key goal of this algorithm is to produce sufficiently randomized outputs which are unpredictable, thereby yielding properties akin to cryptographic MACs. This is a key compo...

Unequal error protection methods for perceptual audio coders

In most source coded bit streams certain bits can be much more sensitive to transmission errors than others. Unequal error protection (UEP) offers a mechanism for matching error protection capability to sensitivity to transmission errors. A UEP system typically has the same average transmission rate as a corresponding equal error protection (EEP) system but offers an improved perceived signal q...