Computer method and apparatus for processing image data

摘要

A method and apparatus for image data compression includes detecting a portion of an image signal that uses a disproportionate amount of bandwidth compared to other portions of the image signal. The detected portion of the image signal result in determined components of interest. Relative to certain variance, the method and apparatus normalize the determined components of interest to generate an intermediate form of the components of interest. The intermediate form represents the components of interest reduced in complexity by the certain variance and enables a compressed form of the image signal where the determined components of interest maintain saliency. In one embodiment, the video signal is a sequence of video frames. The step of detecting includes any of: (i) analyzing image gradients across one or more frames where image gradient is a first derivative model and gradient flow is a second derivative, (ii) integrating finite differences of pels temporally or spatially to form a derivative model, (iii) analyzing an illumination field across one or more frames, and (iv) predictive analysis, to determine bandwidth consumption. The determined bandwidth consumption is then used to determine the components of interest.

主权项

1. A method for video data compression, comprising the steps of:
processing a video signal to determine bandwidth consumption of portions of the video signal; using the determined bandwidth consumption, detecting a portion of the video signal that uses a disproportionate amount of bandwidth compared to one or more other portions of the video signal, the detected portion of the video signal resulting in determined components of interest, which are detected objects in the video signal; modeling invariant portions of the determined components of interest; and normalizing the modeled invariant portions of the determined components of interest to generate an intermediate form of the components of interest, the intermediate form representing the components of interest reduced in complexity enabling a compressed form of the video signal through linear decomposition, where the determined components of interest maintain saliency.