Ilia V. Safonov

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The red eye artifacts are troublesome problem of consumer photos. Correction of red eyes without user intervention is an important task. The novel method of automatic detection of red eyes is proposed. This approach is based on application of color information via 3D tables and edge information via directional edge detection filters. For classification a(More)
An algorithm for the reconstruction of the 3D shape of the surface of a micro-object from a stereo pair of images obtained on a raster electron microscope (REM) has been considered. A model of building an image in REM has been presented. The SIFT algorithm was used for determination of the correspondence points. The correspondence points are used to(More)
Sharpness is an important attribute that contributes to the overall impression of printed photo quality. Often it is impossible to estimate sharpness prior to printing. Sometimes it is a complex task for a consumer to obtain accurate sharpening results by editing a photo on a computer. The novel method of adaptive sharpening aimed for photo printers is(More)
A bottom-up approach to segmentation of a scanned document into background, text, and image regions is considered. The image is partitioned into blocks at the first step. A series of texture features is computed for each block. The block type is determined on the basis of these features. Different variants of block arrangement and size, 26 texture(More)
The problem of automatic detection of regions of interest (ROI) on color photos is considered. The efficiency of Viola-Jones face detector implemented in Intel OpenCV library is analyzed. The image size dependence of the algorithm characteristics is studied. It is shown that there are 2 significant drawbacks of this face detection algorithm as applied to(More)
We propose an approach for embedding of imperceptible hidden data into printed text document with ability to extract this data during scanning. Our approach is based on intrusion of cluster of small black dots (patterns) with predefined positional-independent structure into the document. Such intrusion will not visibly deteriorate document itself. Proposed(More)
For industrial quality control of foam-rubber material, it is required to measure volume of the sample. A new approach is proposed to measure sample volume by images of sample faces. Faces images are got via flatbed scanner. The faces images are processed and the sample is approximated by hexahedron. Then the sample volume is calculated analytically. Also(More)