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Traditional sparse coding has been successfully applied in texture and image classification in the past years. Yet such kind of method neglects the influence of the signs of coding coefficients, which may cause information loss in the sequential max pooling. In this paper, we propose a novel coding strategy for ground-based cloud classification, which is named soft-signed sparse coding. In our method,...
The perfect translation invariance theorem has already been proven, which gives the condition of the perfect translation invariance for complex discrete wavelet transforms of an arbitrary square integrable function. In this paper, three types of discrete wavelet transforms based on this theorem are introduced. One of them is designed with variable density of complex wavelets in the time and frequency...
On chrome-plated surfaces, specular reflection is very strong while reflection is very weak. This makes the automatic inspection on a chrome-plated very difficult. Based on analysis of chrome-plated reflection properties, this paper propose and develop a method to reduce specular reflection. Using the median of gradients of all input images taken with various lighting direction, we reconstruct a syntheses...
A novel algorithm for recovery of camera poses and 3D reconstruction of reference points is presented and realized. A good initial value is estimated for the projective reconstruction by the matrix factorization method using coded targets as original input. The coordinates of the non-coded targets in 3D projective space is then recovered using the stereo triangulation. The coordinates of the non-coded...
In computer vision and close-range photogrammetry, the result of 3D reconstruction depends on the quality of image matching. This paper presents an automatic matching algorithm for image feature based on reference points. This method uses the non-coded points and the coded points. The coded points matched easily are utilized for determination of distance relation between primitives. The non-coded...
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