Improved SIFT matching for image pairs with scale difference

Temizel, Alptekin
Yardimci, Y.
When directly applied to images with different scales, scale invariant feature transform (SIFT) matching performance decreases significantly. In this reported work, this phenomenon is demonstrated and a simple method to increase the performance of SIFT matching is proposed. The proposed method includes preprocessing the images before matching and is compared to previously proposed solutions which only eliminate false matches.


Improved prediction methods for scalable predictive animated mesh compression
Bici, M. Oguz; Akar, Gözde (2011-10-01)
Animated meshes represented as sequences of static meshes sharing the same connectivity require efficient compression. Among the compression techniques, layered predictive coding methods efficiently encode the animated meshes in a structured way such that the successive reconstruction with an adaptable quality can be performed. The decoding quality heavily depends on how well the prediction is performed in the encoder. Due to this fact, in this paper, three novel prediction structures are proposed and integ...
Applications of simulated annealing for the design of special digital filters - Comments
Çiloğlu, Tolga; Ünver, Zafer (1996-04-01)
The way of measuring the performance of a discrete coefficient filter which is designed by scaling optimization is discussed.
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Cinar, Okan; Erdal Erdoğmuş, Merve; Kayran, Altan (2017-03-01)
An approach is introduced for determining accurate two-dimensional equivalent laminated models of sandwich laminates with honeycomb core and composite facesheets by optimization involving modal behavior. The approach relies on minimizing the objective function which is defined as the sum of the square of the differences between the natural frequencies of the honeycomb sandwich laminate estimated by the finite element analysis of the 3D detailed model with the actual honeycomb core geometry and by the 2D equ...
Statistical Analysis and Directional Coding of Layer-based HDR Image Coding Residue
Feyiz, Kutan; Kamışlı, Fatih; Zerman, Emin; Valenzise, Giuseppe; Koz, Alper; Dufaux, Frederic (2017-10-18)
Existing methods for layer-based backward compatible high dynamic range (HDR) image and video coding mostly focus on the rate-distortion optimization of base layer while neglecting the encoding of the residue signal in the enhancement layer. Although some recent studies handle residue coding by designing function based fixed global mapping curves for 8-bit conversion and exploiting standard codecs on the resulting 8-bit images, they do not take the local characteristics of residue blocks into account. Inspi...
Bici, M. Oguz; Akar, Gözde (2010-09-29)
In this paper, we deal with layered predictive compression of animated meshes represented by series of 3D static meshes with same connectivity. We propose two schemes to improve the prediction. First improvement is using weighted spatial prediction rather than averaging neighbor vertices. The second improvement is a novel predictor based on rotation angle of incident triangles in current and previous frames. The experimental results show that around 6- 10 % bitrate reduction can be achieved by replacing the...
Citation Formats
Y. BAŞTANLAR, A. Temizel, and Y. Yardimci, “Improved SIFT matching for image pairs with scale difference,” ELECTRONICS LETTERS, pp. 346–347, 2010, Accessed: 00, 2020. [Online]. Available: