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- Li-Dong Cai
- IJCAI
- 1989

In this paper, an implicit numerical scheme of diffusion smoothing is given for both intensity and depth images, which uses a changeable time step to reduce the computation. Emphasised is a "small leakage" diffusion model as an efficient way to maintain both boundary position and curvature signs along the surface boundary in smoothing, which wi l l be… (More)

- Li-Dong Cai, John E. W. Mayhew
- International Journal of Computer Vision
- 1997

Disparity can be estimated from the local phase differences between a pair of stereo images after Gabor filterings. In this paper, some phase differencing algorithms are discussed from the point of view of numerical computation. They are all categorised as certain types of Newton iterations, hence are restricted by the preconditions of Newton iterations.… (More)

- Li-Dong Cai
- Pattern Recognition
- 1988

- Li-Dong Cai
- Alvey Vision Conference
- 1989

schemes, it provides a uniform theoretical base for some other smoothing methods. It has shown that the elegant Gaussian smoothing (GS) is equivalent to the initial value problem of DS, and the widely-used Repeated Averaging (RA) is a special case of the explicit DS. This paper further proves that Spline smoothing (SS) is a special case of the explicit DS… (More)

- Li-Dong Cai, John E. W. Mayhew
- BMVC
- 1992

Disparity can be estimated using the phase differences between a pair of stereo images after Gabor filtering. In this paper a simple method is proposed for target detection, which uses shift-trials of phase differences to detect the mean disparity over the sampling window up to the precision of one pixel (the sampling interval unit). The process is posed as… (More)

- Li-Dong Cai
- IMA Conference on the Mathematics of Surfaces
- 1988

- Li-Dong Cai
- Third International Conference on Image and…
- 2004

The relative motion between the camera and the scene leads to blurring of images. By appealing to traveling wave equations, the restoration of the motion-blurred images can be achieved and a criterion of objective quality assessment can be obtained for these restored versions even without any a priori knowledge of the original image. Most significantly,… (More)

- Li-Dong Cai
- 2007

This paper compares the KH and KJ sign images in the context of the zero-thresholding at single and multiple scales. It points out that consistent zero-thresholding of curvatures remains necessary for multiple scale surface segmentation. Even though KJ sign image is a good choice for single scale surface segmentation with a zero-thresholding formula J = K ,… (More)

- Xiao-Hui Wang, Long-Li Bo, +4 authors Li-Dong Cai
- Huan jing ke xue= Huanjing kexue
- 2013

Molecular sieve loaded catalyst was prepared by impregnation method, microwave-absorbing material silicon carbide and the catalyst were investigated for catalytic oxidation of toluene by microwave irradiation. Research work examined effects of silicon carbide and molecular sieve loading Cu-V catalyst's mixture ratio as well as mixed approach changes on… (More)

- Li-Dong Cai
- IMA Conference on the Mathematics of Surfaces
- 1992