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In this paper, we propose a macro-observation scheme for unusual event detection in daily life, where motions in time-space domain are described by a global representation and individual activities do not have to be defined and modeled beforehand. The proposed representation records the time-space energy of motions of all moving objects in a scene without segmenting individual object parts or tracking...
Image registration plays an important role in many image processing applications. This paper proposed a robust image registration method that can estimate motion parameters including translation and rotation from a group of different-exposed images. Brightness change and photometric distortion, i.e., under-exposed or over-exposed, between images will result in inaccuracy of the estimation. To solve...
In this paper, a new image synthesis framework is proposed to provide delicate description of a scene. The input is a set of images that capture the same scene under different lighting conditions. By solving a gradient domain optimization problem, the details of the input images can be combined together into an auxiliary image. Then a quadratic filter is used to divide the auxiliary image into base...
It is possible to synthesis a high dynamic range (HDR) image by combining differently exposed low dynamic range (LDR) images of the same scene into one single image. For an HDR scene under low light condition, captured LDR images tend to be noisy, and the noise could usually be amplified during the synthesis process, causing severe degradation of the image quality. In order to reduce the noise during...
Image inpainting aims to restore lost information according to gray patterns from known area. PDE and texture synthesis are both widely applied in image inpainting. A new image inpainting algorithm combined those two kinds of methods are presented. Damaged region pixels are classified into texture pixels and structure pixels, which are inpainted with corresponding algorithms. Texture classification...
In this paper, we introduce a new collaborative image processing algorithm to enhance contours and surface details of a scene through combination of multi-light images, which capture the same scene with fixed view point but different lighting conditions. Firstly, a detail layer that contains all contents of the multi-light images is generated through a gradient domain method and a quadratic filter...
This paper presents a new adaptive tone mapping for high dynamic range (HDR) images. In the proposed scheme, the luminance of an HDR image is decomposed into a base layer with large gradients and a detail layer with small gradients by using an adaptive half quadratic regularization method. The base layer is compressed by a novel global mapping to reduce the dynamic range while the detail layer can...
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