Abstract: The present invention provides an image denoising method and an image denoising apparatus. The image denoising method includes performing preliminary denoising processing to an acquired image to be processed, so as to obtain a preliminarily denoised image; calculating a residual quantity corresponding to a central pixel of each unit area in the image to be processed according to numerical values of specific energy parameters to which the image to be processed and the preliminarily denoised image correspond, respectively; and using the residual quantity to calculate a weight matrix corresponding to each unit area, and performing non-local mean value calculation to the image to be processed according to the weight matrix, so as to realize the denoising processing of the image to be processed. The image denoising method is able to denoise effectively, and make a denoised image more visually natural.

Abstract: A method and system for approximating a curve, and a graphic display control method and apparatus are disclosed. The method for approximating a curve comprises the steps of acquiring number information of subdividing points for subdividing a curve needed to be approximated based on coordinate information of control points of the curve, acquiring coordinate information of the subdividing points based on the number information of the subdividing points and the coordinate information of the control points, and connecting the subdividing points with straight lines based on the coordinate information of the subdividing points. The invention could achieve efficient curve approximation and in turn achieve efficient graphic-display control.

Abstract: An exposure enhancement method and apparatus for a defogged image. The exposure enhancement method includes: constructing an exposure enhancement function in accordance with a defogging parameter; performing exposure enhancement on a defogged image by using the constructed exposure enhancement function. The method and apparatus can adaptively process the defogged image according to the defogging parameter and can process pixels in the defogged image in parallel.

Abstract: Method and apparatus for hand gesture trajectory recognition. The method includes: pre-defining sixteen hand gesture trajectory models, and classifying the sixteen hand gesture trajectory models into three types of hand gesture trajectory models; judging an input hand gesture trajectory belongs to which type of the three types of hand gesture trajectory models; and recognizing input hand gesture trajectories that belong to different types of hand gesture trajectory models with different methods.

Abstract: A method and system for approximating a curve, and a graphic display control method and apparatus are disclosed. The method for approximating a curve comprises the steps of acquiring number information of subdividing points for subdividing a curve needed to be approximated based on coordinate information of control points of the curve, acquiring coordinate information of the subdividing points based on the number information of the subdividing points and the coordinate information of the control points, and connecting the subdividing points with straight lines based on the coordinate information of the subdividing points. The invention could achieve efficient curve approximation and in turn achieve efficient graphic-display control.