Calway, A.D., Knutsson, H. and Wilson, R. 1992, Multiresolution Estimation of 2-d Disparity Using a Frequency Domain Approach, to appear, Proc. British Machine Vision Conf., Leeds.  Home/Search Document Not in Database Summary Related Articles Check |
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A Multiresolution Frequency Domain - Algorithm For Fast Self-citation (Calway Knutsson Wilson) (Correct)
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Calway, A.D., Knutsson, H. and Wilson, R. 1992, Multiresolution Estimation of 2-d Disparity Using a Frequency Domain Approach, to appear, Proc. British Machine Vision Conf., Leeds.
Estimating Dense Motion Fields Using A Local Two-Component Model - Tweed, Calway (1999) Self-citation (Calway) (Correct)
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Calway A.D, Knutsson H, Wilson R, 1992, "Multiresolution estimation of 2-d disparity using a frequency domain approach", BMVC92, 227-236.
Multiresolution Motion Estimation Using An Affine Model - Krüger, Calway (1996) (1 citation) Self-citation (Calway) (Correct)
....of planar patces and the estimation of the affine motions associated with those patches at suitable spatial resolutions in the 2 D plane. For computational reasons the estimation scheme is defined within a quadtree framework based on a similar scheme used previously for disparity estimation [13, 14]. Thus, as illustrated in Fig. 2(b) the local motions for a given frame are associated with regions defined on a quadtree tessalation of the image plane. The estimator consists of two components: 1. A local motion estimation scheme, in which the six parameters of the affine motion model are ....
....are estimated using a correlation technique implemented via the frequency domain [15, 16] 2. An efficient multiresolution search procedure to determine the final motion field in which motion estimates obtained at larger regions are used to direct the estimation of those at smaller region sizes [13, 14]. The result is a motion field associated with each frame similar to that shown in Fig. 2(b) in which an affine motion is associated with each of the regions within the tesselation. b a frame m frame (m 1) c (b) a) d c b a d Figure 2: a) Local motion resulting from 3 D to 2 D projection can ....
A. D. Calway, H. Knutsson, and R. Wilson, "Multiresolution Estimation of 2-D Disparity Using a Frequency Domain Approach," in Proceedings of the British Machine Vision Conference, 1992.
Image Analysis Using a Generalised Wavelet Transform - Calway (1993) Self-citation (Calway) (Correct)
....enabling regions to be analysed over a range of frequencies, yielding a flexibility not possessed by existing WTs. This has allowed the MFT to be used as the basis for tackling a wide range of problems, including linear feature and curve extraction [7] 10] texture analysis [11] and stereopsis [12], and hence provides a framework for a unified approach to image analysis. The Multiresolution Fourier Transform It is simplest to describe the transform in terms of the 1 d continuous case. For a given scale oe, the MFT of the 1 d signal x( at position and frequency is defined as x( ....
....stages, results obtained from synthesizing various classes of texture have demonstrated the considerable potential of the approach. Stereopsis. The expediency of the MFT for performing efficient local correlations also forms the basis of a disparity estimation algorithm for use in stereopsis [12]. Using the MFTs of two binocular images, the disparity between given pairs of regions can be calculated via appropriate local correlations. This is incorporated into a coarse to fine focusing strategy within the MFT framework, in which disparity estimates between regions at larger scales are ....
A.D. Calway, H. Knutsson and R. Wilson, "Multiresolution estimation of 2-d disparity using a frequency domain approach", Proc. British Machine Vision Conf., pp. 227-236, Leeds, England, 1992.
A Multiresolution Frequency Domain Algorithm for Fast.. - Calway, Knutsson, Wilson (1992) Self-citation (Calway Knutsson Wilson) (Correct)
.... using Presented at the Third International Conference on Visual Search, Nottingham, 1992 the coarse to fine analysis procedures mentioned above, although, while such procedures are fast, they have the unfortunate side effect of linking disparity to spatial frequency (Wilson and Knutsson 1989, Calway et al. 1992). The work described here is an attempt to address these problems, and in particular to devise a suitable means of combining disparity estimates. The result is an estimation scheme which accomodates 2 d disparities and which can be incorporated into a fast image registration algorithm. After ....
.... R ; oe; d) is straightforward it is the position of the peak in the inverse 2 d Fourier transform of the product g L ( L ; oe)g R ( R ; oe) It is also interesting to note that the method is equivalent to performing local cross correlations between the binocular images (Calway et al. 1992). To summarise, an estimate of the 2 d disparity with respect to the points L and R in the left and right images respectively at scale oe can be obtained using the following procedure: 1. Derive bandpass versions of each view at uniformly spaced frequencies as defined by eqn (3) 2. ....
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Calway, A.D., Knutsson, H. and Wilson, R. 1992, Multiresolution Estimation of 2-d Disparity Using a Frequency Domain Approach, to appear, Proc. British Machine Vision Conf., Leeds.
Estimating Disparity and Motion Using Multiresolution Fourier .. - Calway, Krüger (1995) Self-citation (Calway) (Correct)
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A.D. Calway, H. Knutsson and R. Wilson, "Multiresolution estimation of 2-d disparity using a frequency domain approach", Proc. British Machine Vision Conf., pp. 227-236, Leeds, 1992.
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