Anti-Distortion Image Contrast Enhancement Algorithm Based on Fuzzy Statistical Analysis of the Histogram Equalization

Yao Nan,Wang KaiSheng,Cai Yue 보안공학연구지원센터 2016 International Journal of Signal Processing, Image Vol.9 No.4

In order to solve such problems as excessive enhancement and chessboard effect, difficult image brightness keeping and distortion in the image enhancement algorithm based on histogram equalization, an anti-distortion image contrast enhancement algorithm based on fuzzy statistics and sub-histogram equalization is proposed in this article. Specifically, the fuzzy set theory is introduced therein to convert the image into fuzzy matrix; then, by virtue of the membership function and the probability of the image gradation, the weighting function is embedded to construct the weighted fuzzy histogram calculation model; then, the mid-value of the initial image is adopted to divide the fuzzy histogram into two sub-histograms, and the corresponding cumulative density functions are defined, and the transformation models thereof are also constructed; then, the inverse transformation function is established to realize defuzzification and output the enhanced image. The experimental data show: compared with the present image enhancement algorithm based on histogram equalization, this algorithm can significantly eliminate excessive enhancement and noise amplification, thus to not only have better visual enhancement quality and anti-distortion performance, but also have maximum AIC (Average Information Contents) value and minimum NIQE (Natural Image Quality Evaluator) value.

Application of Intelligent Video Monitoring System in Electric Power Construction

Yao Nan,Wang KaiSheng,Cai Yue 보안공학연구지원센터 2016 International Journal of u- and e- Service, Scienc Vol.9 No.4

Since the image based intelligent video monitoring system has limited viewing angle, the blind monitoring zone will easily appear when the target is not in the field range of the camera. In order to solve the above problem, an intelligent video monitoring system with auditory function is proposed in this article on the basis of the advantages of sound localization. Firstly, the linear microphone array is acquired and the time delay estimation technology is adopted for sound localization; secondly, the camera is driven to turn to the sound source position to acquire video information; finally, the image detection program is adopted to locate and track the target in a real-time manner, and meanwhile the system feasibility is verified through the simulation experiment. The result shows that the system has good localization and tracking accuracy.

Prognostic Impact of Progesterone Receptor Status in Chinese Estrogen Receptor Positive Invasive Breast Cancer Patients

Nan Yao,Zhenchuan Song,Xinle Wang,Shan Yang,Heng Song 한국유방암학회 2017 Journal of breast cancer Vol.20 No.2

Purpose: Estrogen receptor (ER) and progesterone receptor (PR) have been used as indicators of endocrine system status since the mid-1970s in the clinical management of breast cancer. The predictive role of ER in endocrine therapy is undisputed, but the prognostic value of PR is still debated. The aim of this study was to investigate the clinical characteristics and prognosis of ER positive breast cancer with different PR expression levels. Methods: A population cohort of 3,030 primary invasive ER positive breast cancer patients from a single cancer center underwent surgery and received adjuvant endocrine therapy from 2004 to 2010. The clinical and biological features of these patients with high PR-expressing tumors were compared with those of patients with low PR-expressing tumors. The follow-up data for disease-free survival (DFS), overall survival (OS), and breast cancer specific survival (BCSS) was obtained from 2,778 patients. Cox regression analysis was used to correlate biomarkers and tumor characteristics with DFS, OS, and BCSS. Results: Tumors with low PR expression had more invasive pathological features and biological indexes than those with high PR expression. Low PR expression was an independent poor prognostic factor for DFS (p=0.014; hazard ratio [HR], 0.781; 95% confidence interval [CI], 0.641–0.950), OS (p=0.002; HR, 0.699; 95% CI, 0.560–0.873), and BCSS (p=0.005; HR, 0.714; 95% CI, 0.566–0.902). Furthermore, in low PR expressing tumors, patients who received chemotherapy had better DFS (p=0.002; HR, 0.449; 95% CI, 0.268–0.751), OS (p<0.001; HR, 0.341; 95% CI, 0.192–0.606), and BCSS (p<0.001; HR, 0.292; 95% CI, 0.156–0.549) than patients who did not received chemotherapy. Conclusion: Patients with ER positive invasive breast cancer with low PR expressing tumors have a worse prognosis than those with high PR expressing tumors, and these patients can benefit from chemotherapy.

Image Denoising Algorithm Based on Non Related Dictionary Learning

Yao Nan,Wang KaiSheng,Cai Yue 보안공학연구지원센터 2016 International Journal of Signal Processing, Image Vol.9 No.3

In allusion to the partial texture information loss during image deniosing process, an image denoising algorithm based on non related dictionary learning is proposed in this article. In this algorithm, the noise image is firstly divided into mutually overlapped image blocks, and a certain quantity of these image blocks are randomly selected for subsequent dictionary learning; then, non related dictionary learning technology is adopted to obtain the redundant dictionary with relatively strong irrelevance; finally, the sparse encoding algorithm is adopted to obtain the sparse representation coefficient of each image block in the redundant dictionary, and such sparse representation coefficients are used to recover the original image. The experiment result shows: since the redundant dictionary obtained through non related dictionary learning technology can strongly represent the image texture information, PSNR (Peak Signal to Noise Ratio) of the algorithm proposed in this article is superior to that of the existing advanced algorithm, and the algorithm can well keep the image detail and texture information, thus to improve visual effect.

Background Motion Video Tracking of the Memory Watershed Disc Gradient Expansion Template

Yao Nan,Shen Haiping 보안공학연구지원센터 2016 International Journal of Multimedia and Ubiquitous Vol.11 No.4

In order to further improve motion video target tracking and detection accuracy, a motion video tracking algorithm based on memory watershed disc gradient expansion template is proposed in this article. Firstly, heterodromous diffusion is executed to preprocess the motion video image in order to reduce the noise interference in the motion target tracking and detection process, and meanwhile the differential operation and the morphological operation are executed to extract and operate the outer profile of the motion object. Secondly, in allusion to the excessive division in the watershed algorithm, target marking and division of the watershed algorithm are realized on the basis of characteristic memory, and the accurate detection of the motion target is realized on the basis of the disc gradient expansion template. Finally, according to the experimental comparison, the algorithm proposed in this article can be applied in the complex background detection of the motion target, and such algorithm can not only improve the motion target detection accuracy, but also significantly improve computation speed.

Behavioral Response of Termites to Tunnel Intersection

Sook Jung Ku,Sheon-Young Kang,Nan-Yao Su,Sang-Hee Lee 한국응용곤충학회 2009 한국응용곤충학회 학술대회논문집 Vol.2009 No.05

Subterranean termites construct complicated tunnel network for foraging below the ground. Thus, they often encounter a number of tunnel intersections during their moving from place to place in the network. In order to understand how termites respond to the intersections, we artificially excavated two tunnels intersected with 90° degree in soil-filled arenas. The two tunnels had the width of W1 and W2 (=2, 3, and 4mm), respectively. We systematically observed the response behavior of advancing termites to the intersection with the combination of W1 and W2, (W1, W2). For (W1, W2)=(2, 2) and (3, 3), the advancing termites passed the intersection without directional changes because it was difficult for termites to bend their body to change their moving direction due to the small-sized width. For (W1, W2)=(4, 4), the termites statistically-equally chose the three directions, left, right, and straight, which was due to the fact that the intersection provided enough space for termites to bend. For (W1, W2)=(2, 3), (2, 4), and (3, 4), termites, advancing in narrower tunnels, tended considerably to turn right or left, while termites, advancing in wider tunnels, were favorably inclined to go straight. These results can be understood by considering the relationship between termite body length and tunnel width as explained for the cases of W1=W2. In addition, we briefly discussed our findings in relation to termite foraging efficiency.

Behavioral Response of Termites to Tunnel Surface Irregularity

Sang-Hee Lee,Rou-Ling Yang,Nan-Yao Su 한국응용곤충학회 2009 한국응용곤충학회 학술대회논문집 Vol.2009 No.05

Subterranean termites construct underground tunnels, tens to hundreds of meters in length, in order to search for and transport resources. Diverse soil conditions surrounding the tunnels, such as soil pores and differing moisture concentrations, may cause different sized- and shaped-irregularities in the tunnels. To understand how individual termites respond to the irregularities, the present study monitored the movement of termites, Coptotermes formosanus Shiraki, in artificially excavated tunnels with rectangular irregularities of varying sizes in twodimensional sand substrates. Termites tunneled at some of the irregularities and not at the others. The tunneling or non-tunneling behavior resulted from four different responses. The non-tunneling response may result from a behavioral adaptation that allows termites to avoid wasting energy that may be used in foraging.

Laminarin enhances the quality of aged pig oocytes by reducing oxidative stress

YAO, Xuerui,JIANG, Hao,LIANG, Shuang,SHEN, Xinghui,GAO, Qingshan,XU, Yong Nan,KIM, Nam-Hyung 家畜繁殖硏究所 2018 Journal of Reproduction and Development Vol.64 No.6

<P>Laminarin (LAM) is a β-glucan oligomer known to possess biological activities such as anticancer and antioxidant effects. This study explored the influence of LAM supplementation on <I>in vitro</I> aged porcine oocytes and the underlying mechanisms behind this influence. We found that LAM delayed the aging process and improved the quality of aged oocytes. LAM supplementation enhanced the subsequent developmental competence of aged oocytes during the <I>in vitro</I> aging process. The blastocyst formation rate was significantly increased in aged oocytes treated with 20 µg/ml LAM compared to non-treated aged oocytes (45.3% <I>vs</I>. 28.7%, P < 0.01). The mRNA levels of apoptosis-related genes, B cell lymphoma-2-associated X protein (<I>Bax)</I> and <I>Caspase-3,</I> were significantly lower in blastocysts derived from the LAM-treated aged oocytes during the <I>in vitro</I> aging process. Furthermore, the level of intracellular reactive oxygen species was significantly decreased and that of glutathione was significantly increased in aged oocytes following LAM treatment. Mitochondrial membrane potential was increased, and the activities of caspase-3 and cathepsin B were significantly reduced in the LAM-treated aged oocytes compared with the non-treated aged oocytes. Taken together, these results suggest that LAM is beneficial for delaying the aging process in porcine oocytes.</P>

Competition growth of α and β phases in Ti-50 at.%Al peritectic alloy during the rapid solidification by laser melting technique

Yao, Wenjing,Niu, Xiuling,Zhou, Long,Wang, Nan,Lee, Jehyun Springer-Verlag 2013 Acta metallurgica sinica Vol.26 No.5

Nano-eutectic growth in Co-17.8 wt%Gd alloy ribbons and the magnetostrictive properties at different wheel speeds.

Yao, Wen-Jing,Sun, Wen,Wang, Nan,Han, Seung Zeon,Lee, Je-Hyun American Scientific Publishers 2014 Journal of nanoscience and nanotechnology Vol.14 No.11

<P>Under near-equilibrium solidification conditions, the Co-17.8 wt%Gd eutectic alloy forms rod-like eutectic microstructure of (αCo) solid solution and Co17Gd2 compound. When the solidification condition is far from the equilibrium, the rapid growth of nano-eutectic in Co-17.8 wt%Gd alloy ribbons is realized by the single-roller techniques. The average granular size (d) of nano-eutectic in the center of ribbons varies with the increase of wheel speed (V), d = 510.36-25.51 V+0.44 V2. XRD results of ribbons at different wheel speeds indicate that, with the rise of wheel speed, the main peak of Co17Gd2 compound becomes more and more notable, whereas the main peak of (αCo) solid solution tends to reduce. Along the length direction, the Co-17.8 wt%Gd alloy ribbons have the negative magnetostrictive strain. The magnetostrictive strain enhances with the increase of wheel speed. At the wheel speed of 40 m/s, the magnetostrictive coefficient of ribbons is measured to be - 733 ppm at the magnetic field of 6 kOe. The influence of the wheel speed and the magnetic field on the maanetostrictive coefficient is discussed.</P>