Temporal segmentation of video data for partitioning the sequence into shots is a prerequisite in many applications: automatic video indexing and editing, old film restoration, perceptual coding, etc. The detection of abrupt transitions or cuts has been thoroughly studied in previous works. In this paper we present a scheme to identify the most common gradual transitions, i.e., dissolves and wi...

Conditional morphology is a nonlinear method for simultaneous edge detection and image smoothing. It is derived by defining statistical models for the input-output relation as in statistical morphology, with the introduction of a line process taking into account the discontinuities between different regions of the image. It results to be a method presenting the advantages of both morphological ...

Iberian ham presents superior sensorial quality than other ones. Currently, chemical procedures are being used to determine fat level of the ham, but they can not give any information about its distribution. Some research made on Iberian hams from pigs with different feeding reveal similar fat level, but pigs fed on acorns and grass reached better qualifications in a sensorial analysis of the s...

Mathematical morphology has been an area of intensive research over the last few years. Although many remarkable advances have been achieved throughout these years, there is still a great interest in accelerating morphological operations in order for them to be implemented in real-time systems. In this work, we present a new model for computing mathematical morphology operations, the so-called ...

MARS. M. M. Pedrosa 1 , J. R. Nogueira 2 e E. A. Silva 3 , 1 Programa de Pós-graduação em Ciências Cartográficas, Universidade Estadual Paulista – FCT/UNESP, Presidente Prudente, SP, Brasil, ([email protected]), 2 Depto de Matemática, Universidade Estadual Paulista – FCT/UNESP, Presidente Prudente, SP, Brasil ([email protected]), Depto de Cartografia, Universidade Estadual Paulista – FCT/U...

This paper presents a case study on the dynamics of Ambrosia artemisiifolia populations in the surroundings of Trois-Rivières (Canada) that will enable us to demonstrate the validity of our arguments on a new procedure for change detection. Ambrosia artemisiifolia (common ragweed) is a very common and abundant annual plant in the open spaces of Northeastern America. The pollens emited by this p...

Symmetrical and circular structural elements (SE) play a central role in mathematical morphology in the continuous plane, since they provide an isotropic treatment of the image. On the other hand, for digital images, circular SE are rarely used because there is no simple and efficient implementation of the dilation by such a SE on a discrete lattice. Indeed, a direct application of the definiti...

The design of operators (e.g. filters) for Signal or Image Processing requires an algebraic decomposition structure, to represent the family of operators considered, and statistical optimization techniques, defined over the space of operator decompositions or over another isomorphic structure. This paper surveys a technique for designing set operators based on Mathematical Morphology decomposit...

The definition of morphological operators for colour images needs a total ordering between the colour points. A colour can be represented according to different algebraic structures, in particular in this paper we focus on real quaternions. The paper presents two main contributions. On the one hand, we have studied different alternatives to introduce the scalar part to obtain full colour quater...

Several libraries dedicated to mathematical morphology exist. But they lack genericity, that is to say, the ability for operators to accept input of different natures —2D binary images, graphs enclosing floating values, etc. We describe solutions which are integrated in Olena, a library providing morphological operators. We demonstrate with some examples that translating mathematical formulas a...