Full-text resources of PSJD and other databases are now available in the new Library of Science.
Visit https://bibliotekanauki.pl
Preferences help
Polish version English version Language
enabled [disable] Abstract
Number of results

Results found: 4

Number of results on page
first rewind previous Page / 1 next fast forward last

Search results

help Sort By:

help Limit search:
first rewind previous Page / 1 next fast forward last
1

Analysis of computational complexity in holographic lens-less projection

100%
Kowalczyk A., Bieda M., Makowski M., Ducin I., Kakarenko K., Suszek J., Sobczyk A.
|
|
vol. 6
|
issue 3
84-86
EN
In lens-less projection the illuminating wavefront must be modified, so that after propagation on a certain distance it would form an image on the screen. Formed images will be displayed with a frame rate minimum of 20fps in the case of an animated movie. Thus, the speed of computing is extremely important. Computing might be performed by the central processing unit (CPU) or the graphics processing unit (GPU). Reaching a compromise between computational complexity (as well as the time of computing) and the quality of an obtained image is needed. This leads to a need for a proper iteration number of an algorithm, its parameters and size of computing matrices.
2

Experimental study of noise and image resolution in holographic projection with different spatial division techniques

100%
Kakarenko K., Ducin I., Makowski M., Kowalczyk A., Bieda M., Suszek J.
|
|
vol. 6
|
issue 3
96-98
EN
In lens-less projection it is reasonable to display on the Spatial Light Modulator various holographic phase distributions and decide which gives the best results on the projection screen. The merit functions are high contrast and low noise ratio in projected images. For that reason we designed holograms to be displayed on the light modulator in 7 different methods. In particular, different resolutions and placements of mosaics of sub-holograms were examined.
3

Optimized computation method for real - time holographic formation of color images

100%
Makowski M., Ducin I., Kakarenko K., Kowalczyk A., Bieda M., Suszek J.
|
|
vol. 6
|
issue 3
81-83
EN
A simple method is presented of decreasing the calculation time of CGH for lensless Fourier holograms. The proposed method takes advantage of the fact that modern displays are rectangular with a high image proportion ratio of 16:9 or even higher. The CGH was calculated on a matrix of 512×1024 points. The use of small rectangular calculation matrices allowed three times fasters calculation with sustained contrast and noise ratio and greatly improved resolution.
4

Efficient noise averaging in color holography by integration on shifted Fourier spectra

100%
Ducin I., Kakarenko K., Makowski M., Kowalczyk A., Bieda M., Suszek J.
|
|
vol. 6
|
issue 3
99-101
EN
Modern holography is dealing mainly with speckle noise and computational complexity. A compromise is required between computational complexity (computing time) and quality of obtained images. This leads to a need to obtain a simple method of noise suppression with low computation complexity. An improved efficient projection of color images is presented. It uses time averaging of intensity patterns reconstructed from the same Fourier hologram with lateral shifting in x and y direction. We try to establish the optimal step of shifting the Fourier spectra in both directions for each of the primary colors.
first rewind previous Page / 1 next fast forward last
JavaScript is turned off in your web browser. Turn it on to take full advantage of this site, then refresh the page.