Parallel superposition of phase holograms for multiple parameters identification.

A method to identify the azimuthal index of vortices and the radial parameter of axicons, as well as their associated spatial frequencies, is presented. These constructive parameters are employed to design parallel superimposed computer-generated holograms (PSCGHs). The diffraction patterns are studied in correspondence with the constructive parameters of the PSCGH.

Evaluation of the metastatic potential of malignant cells by image processing of digital holographic microscopy data.

The cell refractive index has been proposed as a putative cancer biomarker of great potential, being correlated with cell content and morphology, cell division rate and membrane permeability. We used digital holographic microscopy to compare the refractive index and dry mass density of two B16 murine melanoma sublines of different metastatic potential. Using statistical methods, the distribution of phase shifts within the reconstructed quantitative phase images was analyzed by the method of bimodality coefficients.

Similarity analysis for DNA sequences based on chaos game representation. Case study: the albumin.

Using chaos game representation we introduce a novel and straightforward method for identifying similarities/dissimilarities between DNA sequences of the same type, from different organisms. A matrix is associated to each CGR pattern and the similarities result from the comparison between the matrices of the sequences of interest. Three different methods of analysis of the resulting difference matrix are considered: a 3-dimensional representation giving both local and global information, a numerical characterization by defining an n-letter word similarity measure and a statistical evaluation.