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A DCT-based phase correlation motion estimation algorithm is proposed in this paper. By combining four real transforms, a new complex linear phase transform is obtained and is used in phase correlation motion estimation. The application in video compression is discussed in detail. The simulation results show that the proposed algorithm is robust and(More)
Current video coding techniques provide very good performance both in terms of compression ratio as well as image quality. In practice, the required computational complexity tends to be significant. Environments that have significant power or computational performance restrictions would benefit from improved coding and decoding, especially if complexity is(More)
We propose a fast and robust 2D-affine global motion estimation algorithm based on phase-correlation in the Fourier-Mellin domain and robust least square model fitting of sparse motion vector field and its application for digital image stabilization. Rotation-scale-translation (RST) approximation of affine parameters is obtained at the coarsest level of the(More)
We propose a fast and robust global motion estimation (GME) algorithm, based on a 2-stage coarse-to-fine refinement strategy, which is capable of measuring large motions. A 6-parameter affine motion model has been used. Coarse estimation is carried out in the frequency domain using polar, log-polar or log-log sampling of the Fourier magnitude spectrum of(More)
A lot of research has been conducted on motion-compensated (MC) de-interlacing, but there are very few publications that discuss the performances of de-interlacing quantatively. The various methods are compared through their performance on known video sequences. Linear system analysis of interlaced video and de-interlacer are proposed in . It is well(More)
In this paper we investigate the application of texture synthesis and image inpainting techniques for video applications. Working in the non-parametric framework, we use 3D patches for matching and copying. This ensures temporal continuity to some extent which is not possible to obtain by working with individual frames. Since, in present application,(More)
In this paper, a de-interlacing technique using motion compensated interpolation is proposed. In the proposed scheme motion estimation is first performed between the same parity field i.e., reference and current field from either odd or even fields. Compared to other motion adaptive and motion compensated interpolation technique this method results in a(More)
In this paper, a robust and improved image segmentation technique is proposed for segmentation of a fused image based on Discrete Cosine Transform (DCT) with Artificial Bee Colony Optimization (ABC) termed as DCTopti. It is very challenging task to perceive details information from a visual image due to variation of light, reflection, existence of shadow(More)
The majority of the work on deinterlacing techniques is ad hoc in nature and lacks theoretical justification. The designs are heuristic and the results are in most cases experimental. It is very difficult to quantify the overall performance of a deinterlacing system based on its performance over a few video sequences. In this paper, we present a linear(More)
Liquid Crystal Displays (LCD) has become a universal choice for television displays in the recent years. Due to the electro-optic nature of the LC materials the response time for gray to gray transitions is not fast enough for high quality video applications. The slow response time of the LCD results in motion artifacts, which are visible as blur of moving(More)