Autor: Polec, J. - Prolib Integro

Skocz do pozycji: 1.

Tytuł:: Objective Video Quality Method Based on Mutual Information and Human Visual System
Autorzy:: Mardiak, M.
Polec, J.
Tematy:: objective video quality
HVS
mutual information
VQM
SSIM
PSNR; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Powiązania:: https://bibliotekanauki.pl/articles/227280.pdf Link otwiera się w nowym oknie
Opis:: In this paper we present the objective video quality metric based on mutual information and Human Visual System. The calculation of proposed metric consists of two stages. In the first stage of quality evaluation whole original and test sequence are pre-processed by the Human Visual System. In the second stage we calculate mutual information which has been utilized as the quality evaluation criteria. The mutual information was calculated between the frame from original sequence and the corresponding frame from test sequence. For this testing purpose we choose Foreman video at CIF resolution. To prove reliability of our metric were compared it with some commonly used objective methods for measuring the video quality. The results show that presented objective video quality metric based on mutual information and Human Visual System provides relevant results in comparison with results of other objective methods so it is suitable candidate for measuring the video quality.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Shape Independent Coding Using NURBS and Bézier Approximation and Interpolation Curves
Autorzy:: Ondrušová, S.
Polec, J.
Tematy:: NURBS
Bezier
image compression
segmentation
shape independent transform; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Powiązania:: https://bibliotekanauki.pl/articles/227081.pdf Link otwiera się w nowym oknie
Opis:: In this paper a scheme of utilizing shape independent basis functions for the hierarchical multiresolution image compression is shown. For a given image texture region segmentation method is used. Following polygonal approximation of created segments causes a degradation of their boundaries. Using NURBS and Bezier interpolation and approximation segments' boundaries are created, thus achieving an image mask. As an input of the three-level hierarchical encoder this image mask and image are used. The image mask and image are subsampled by a factor of 2 on each level. The hierarchical encoder encodes them shape independently. Especially for a very low bit rate image coding gives better results for objective criteria (PSNR). For segment approximation the 2D shape independent orthogonal transform (DCT II) is used. Splines encoding and decoding is very efficient, because only their control points need to be stored. The segment is coded with a modified code similar to the JPEG code.
Dostawca treści:: Biblioteka Nauki

Artykuł

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Skocz do pozycji: 3.

Tytuł:: GOP Structure Adaptable to the Location of Shot Cuts
Autorzy:: Krulikovská, L.
Polec, J.
Tematy:: shot cut detection
Pearson correlation coefficient
motion estimation
adaptive threshold
video encoding
adaptive GOP structure; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Powiązania:: https://bibliotekanauki.pl/articles/227351.pdf Link otwiera się w nowym oknie
Opis:: In this paper we present a novel two stage algorithm for improving video coding efficiency. The proposed method combines video cut detection and adaptive GOP structure. At first, we have proposed a new technique of frames' comparison for the shot cut detection. The majority of existing methods compare pairs of successive frames. We compare actual frame with its motion estimated prediction. We also present adaptive threshold. The efficiency of novel technique for video cut detection was confirmed through experiment and compared to the commonly used ones in the terms of recall and precision. The next step is to situate I frames to the positions of detected cuts during the process of video encoding. Finally the proposed method is verified by simulations and the obtained results are compared with fixed GOP structures of sizes 4, 8, 12, 16, 32, 64, 128 and GOP structure with length of entire video. Proposed method achieved the gain in bit rate from 15,33% to 50,59%, while not degrading PSNR in comparison to simulated fixed GOP structures.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Intelligibility Threshold for Cued Speech in H.264 Video Conference
Autorzy:: Heribanová, P.
Polec, J.
Poctavek, J.
Mordelová, A.
Tematy:: cued speech
intelligibility
logatom
video; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Powiązania:: https://bibliotekanauki.pl/articles/226326.pdf Link otwiera się w nowym oknie
Opis:: This paper discusses the cued speech recognition methods in videoconference. Cued speech is a specific gesture language that is used for communication between deaf people. We define the criteria for sentence intelligibility according to answers of testing subjects (deaf people). In our tests we use 30 sample videos coded by H.264 codec with various bit-rates and various speed of cued speech. Additionally, we define the criteria for consonant sign recognizability in single-handed finger alphabet (dactyl) analogically to acoustics. We use another 12 sample videos coded by H.264 codec with various bit-rates in four different video formats. To interpret the results we apply the standard scale for subjective video quality evaluation and the percentual evaluation of intelligibility as in acoustics. From the results we construct the minimum coded bit-rate recommendations for every spatial resolution.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Contemporary trends in development of active substances possessing the pesticidal properties: neonicotinoid insecticides
Autorzy:: Legocki, J.
Polec, I.
Tematy:: insecticide
nicotinoid insecticide
nicotine
nitroguanidine derivative
pesticidal property
2-nitroethane derivative
nicotinic acetylcholine receptor
neonicotinoid insecticide
agonistic activity; Pokaż więcej
Wydawca:: Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
Powiązania:: https://bibliotekanauki.pl/articles/55158.pdf Link otwiera się w nowym oknie
Opis:: A new group of insecticides, widely introduced to the agriculture practice since the 90-ies of XX century - neonicotinoides, is discussed. The history of its arise, and insecticidal properties, mode of action, and short characteristics of some of its representatives is presented.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Contemporary trends in development of active substances possessing the pesticidal properties: ryanodine-receptor targeting insecticides
Autorzy:: Legocki, J.
Polec, I.
Zelechowski, K.
Tematy:: insecticide
bioinsecticide
pesticidal property
Ryania speciosa
stem extract
chlorantraniliprole
anthranilic diamide
ryanodine receptor
Cyazypyr
flubendiamide
calcium channel
phthalic acid diamide
ryanodine
active substance
insecticidal property; Pokaż więcej
Wydawca:: Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
Powiązania:: https://bibliotekanauki.pl/articles/55230.pdf Link otwiera się w nowym oknie
Opis:: The latest developed classes of synthetic insecticides – phthalic acid diamides and antranilic diamides, acting as ryanodine receptor modulators, are discussed. The mode of their activity, the insecticidal properties and characteristics of their representatives is reviewed.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: Contemporary trends in development of active substances possessing the pesticidal properties: spinosyn insecticides
Autorzy:: Legocki, J.
Polec, I.
Zelechowski, K.
Tematy:: biopesticide
spinosyn
macrocyclic lactone
forozoamine
2’,3’4’-tri-O-metyloramnose
Saccharopolyspora spinosa
spinosyn A
spinosyn D
Spinosad preparation
Saccharopolyspora pogona
butenylspinosyn
spinetoram
aglicone
pseudo aglicone
active substance
pesticidal property
secondary metabolite
chemical structure
insecticide
spinosyn insecticide; Pokaż więcej
Wydawca:: Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
Powiązania:: https://bibliotekanauki.pl/articles/55252.pdf Link otwiera się w nowym oknie
Opis:: A new group of insecticides belonging to the category of bio-pesticides, namely – spinosyns, is discussed. The spinosyns are the products of bacterial fermentation by microorganisms Saccharopolyspora spinosa (Actinomycetes group) in a nutrient media. The chemical structures of spinosyns, also those developed by the semi-synthetic and biochemical modifications, as well as their insecticidal properties and mechanism of biological activity, the range of their application in crop protection and the commercially available products based on them, are reviewed.
Dostawca treści:: Biblioteka Nauki

Artykuł

na półce

Skocz do pozycji: 8.

Tytuł:: Ethyl [1S, 2RS]-and [1S,2S]-2-[2-chloro-propanoyloxy]propanoate. Preparation and hydrolysis
Autorzy:: Polec, I.
Komorowska-Kulik, J.
Kielczewska, A.
Bombinska, D.
Legocki, J.
Tematy:: ethyl 2-[2-chloro-propanoyloxy]propanoate
hydrolysis
ethyl L-lactate
2-chloropropionyl chloride; Pokaż więcej
Wydawca:: Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
Powiązania:: https://bibliotekanauki.pl/articles/55406.pdf Link otwiera się w nowym oknie
Opis:: Ethyl (1S,2RS)-2-(2-chloropropanoyloxy)propanoate ((1S,2RS)-(I)) was obtained from rac-2-chloropropionyl chloride and ethyl L-lactate. (1S,2S)- (I) was also synthesized from (S)-2-chloropropionyl chloride and ethyl L-lactate with 93% d.e. (I) was undertaken hydrolysis by different media: NaOH/THF-H2O, Na2CO3/THF-H2O, LiOHxH2O/THF-H2O, 25% NaOH/H2O, and weakly acidic ion-exchange resin Amberlite IRC748 dispersion in MeOH. (1S,2RS)-2-(2-Chloropropanoyloxy) propanoic acid (II) diastereomers were identified as products of acidic hydrolysis with the ionic resin. GC/MS, HPLC and HPLC/MS analyses of resulted products are presented.
Dostawca treści:: Biblioteka Nauki

Artykuł

na półce

Skocz do pozycji: 9.

Tytuł:: Ethyl N,N-dimethyl- and N,N-dimethylamidophosphoric acids sodium salts. Preparation and hydrolysis
Autorzy:: Polec, I.
Huras, B.
Sas, A.
Kielczewska, A.
Legocki, J.
Tematy:: N,N-dimethylamidophosphoric acid
sodium salt
preparation
hydrolysis
ethyl N,N-dimethylamidophosphoric acid; Pokaż więcej
Wydawca:: Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
Powiązania:: https://bibliotekanauki.pl/articles/55150.pdf Link otwiera się w nowym oknie
Opis:: Sodium salts of ethyl N,N-dimethyl- and N,N-dimethylamidophosphoric acids I and II were obtained and their hydrolysis to respective acids was investigated. The salts and acids were characterized by spectral methods (MS, FT/IR, 1H, 13C, 31P NMR).
Dostawca treści:: Biblioteka Nauki

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na półce

Skocz do pozycji: 10.

Tytuł:: The computer analysis of photographs thermovision and RTG pictures in correlation with spirometry in scoliosis diagnostics
Autorzy:: Dyszkiewicz, A.
Wróbel, Z.
Chachulski, D.
Połeć, P.
Zajdel, J.
Tematy:: etiopatogeneza skoliozy
współczynniki asymetrii tułowia
komputerowe pomiary aktywności ciała
scoliosis etiopathology
thorax asymmetry coefficients
body's activity computer measurement; Pokaż więcej
Wydawca:: Uniwersytet Śląski. Wydział Informatyki i Nauki o Materiałach. Instytut Informatyki. Zakład Systemów Komputerowych
Powiązania:: https://bibliotekanauki.pl/articles/333942.pdf Link otwiera się w nowym oknie
Opis:: In the study, the outline of etiopatogenesis and epidemiology of the lateral spinal curvature is presented. We proposed multiparameter verification of the radiography and spirometry factors detected by thermovision investigation conducted on the patients of The Outpatient Clinic for Rehabilitation. The binary, take-off board thermo-pictures carried out using different temperature thresholds, visualised asymmetry of infrared radiation emitted by paravertebral muscles in kinds of scoliosis and symmetric images in normal condition. The different level of the correlation between thermovision picture asymmetry factor (TAF), the value of the Cobb's angle and the normal breathing capacity index (VS, DS) were obtained depending on the type of scoliosis. The aim of the work was to answer the following questions: (1) In what type of scoliosis the correlation between curvature angle and the respiratory capacity and spine asymmetry factor SAF is the highest. (2) Does the noticeable asymmetry of para-vertebral muscles in the thermographic image exist among the groups of scoliosis examined? (3) Does the simple type of plan-metric image processing guarantee sufficient level of expression in infrared emission differences between para-vertebral muscles? (4) In which type of scoliosis the correlation between curvature angle, respiratory factors (VS, SD) and the thermoemission asymmetry index (TAF) is the highest.The research group consisted of 60 persons: 20 boys (33,3% of the group) and 40 girls (66,6%). The average age for girls was 13,5 (± 3,65), for boys - 12,7 (± 2,85). The control group consisted of 30 healthy children from The Second Primary School of Cieszyn of which 10 were boys aged on average 11,7 (± 1,25) and 20 were girls aged on average 12,8 (± 2,4).Conclusions: (1) asymmetry of termovision picture in correlation with respiratory factors and the Cobb's angle exists in long-arched curvatures mainly in mirror type. (2) thermovision asymmetry factor (TAF) and spine asymmetry factor (SAF) of light photographs had better correlations with Cobb's angle than respiratory parameters VC, DC, (3) simplified procedure for measuring asymmetry factors in photographs recommended this methods to screen scoliosis diagnostic because it is less expensive comparing to infrared camera diagnistics.
Dostawca treści:: Biblioteka Nauki

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