Bundit Thipakorn | King Mongkut's University of Technology North Bangkok (original) (raw)
Papers by Bundit Thipakorn
Proceedings of the Image and Vision …, 2000
ITC-CSCC :International Technical Conference on Circuits Systems, Computers and Communications, Jul 1, 2003
누리미디어에서 제공되는 모든 저작물의 저작권은 원저작자에게 있으며, 누리미디어는 각 저작물의 내용을 보증하거나 책임을 지지 않습니다. 단, 누리미디어에서 제공되는 서지정보는 ... more 누리미디어에서 제공되는 모든 저작물의 저작권은 원저작자에게 있으며, 누리미디어는 각 저작물의 내용을 보증하거나 책임을 지지 않습니다. 단, 누리미디어에서 제공되는 서지정보는 저작권법에 의해 보호를 받는 저작물로, 사전 허락 없이 임의로 대량 수집하거나 프로그램에 의한 주기적 ...
วารสารวิจัยและพัฒนา มจธ., Oct 26, 2012
A digital watermarking scheme, based on the spread spectrum techniques, is proposed in this paper... more A digital watermarking scheme, based on the spread spectrum techniques, is proposed in this paper. The scheme uses the frequency hopping spread spectrum technique to determine positions for watermark embedding in the original image, while the direct sequence spread spectrum technique is used to provide robustness to the watermark signal. This scheme has an advantage over the existing spread spectrum watermarking schemes, that is, various levels of watermark signal can be embedded into the original image in order to minimize the quality degradation of the watermarked image. To embed the watermark signal, the selected bits of selected pixels are used to carry the watermark signal. The performance of the watermarking scheme is evaluated by using the Peak Signal to Noise Ratio (PSNR). The experimental results indicated that the proposed scheme gained higher PSNR and, simultaneously, more watermark bits could be embedded into the original image.
E-Learn: World Conference on E-Learning in Corporate, Government, Healthcare, and Higher Education, 2003
Asian Biomedicine, Jan 26, 2010
Endothelial dysfunction has been documented as the key process of both macro-and microangiopathy ... more Endothelial dysfunction has been documented as the key process of both macro-and microangiopathy in diabetes mellitus. The development of endothelial dysfunction can be characterized by both impairment of vasorelaxation and increased expression of adhesion molecules. The increase in reactive oxygen species (ROS), subsequently produced from long-term hyperglycemia, was suggested as a major underlying cause of diabetic-induced endothelial dysfunction [1-3]. The interaction between leukocytes and endothelium is one of the markers for diabetesinduced endothelial dysfunction. Interestingly, our previous studies in diabetic rats have shown that vitamin C supplementation could reduce leukocyte-endothelial cell interactions in both experimental models of long-term preventive and early phase reversal trials [4, 5].
International Journal of Smart Engineering System Design, Oct 1, 2003
Currently, the core of Thai speech recognition algorithms focuses on word recognition. However, s... more Currently, the core of Thai speech recognition algorithms focuses on word recognition. However, such algorithms are not appropriate to construct the Speech-to-Text system since the ultimate goal in Speech-to-Text system is to recognize continuous speech states from any speaker of a given language. The meaning in each given language and its sound can be determined by phonemes which are slightly different for each language. The variability in each speaker's voice, for instance, accents, gender and speech style, and the tonal language such as Thai language can create rather different speech signals for the same word. Thus, phoneme recognition is more dif¢cult to perform. Since segmentation takes place prior to recognition in such systems, an incorrect segmentation invariably leads to incorrect recognition results. We proposed a method for phoneme segmentation that based on Discrete Wavelet Transform (DWT). To verify our method, we performed experiments on eleven speakers: ¢ve males and six females. Each speaker pronounced one hundred and thirty Thai words. Then, we evaluated the performance of our method by synthesizing the new words from the obtained phonemes. The speech synthesis of the new words was then observed by humans to compare with the natural-sounding speech. The results indicated 95% accuracy.
PubMed, 2005
The protective effects of exercise training on the diabetic-induced endothelial cell (EC) dysfunc... more The protective effects of exercise training on the diabetic-induced endothelial cell (EC) dysfunction were determined using intravital fluorescent microscopy. Male Sprague-Dawley rats were divided into three groups of control (Con), diabetes (DM), and diabetes with exercise--training (DM+Ex). Diabetes was induced by single intravenous injection of streptozotocin (STZ; 50 mg/kg BW). The exercise training protocol consisted of treadmill running, 5 times/week with the velocity of 13-15 m/min, 30 min/day periods for 12 and 24 weeks (wks). 24 wks after the STZ injection, blood glucose (BG), glycosylated hemoglobin (HbA1C), mean arterial blood pressure (MAP) and heart weight (HW) were significantly higher in DM rats (p < 0.001). However, DM+Ex rats had reduced the abnormalities of MAP (p < 0.01) and HW (p < 0.05) compared with DM rats. Furthermore, there was a significant decrease in heart rate (HR) of DM+Ex rats (p < 0.05) relative to Con rats. To examine the influence of exercise training on EC dysfunction, leukocyte-EC interactions in mesenteric venules and vascular reactivity responses to vasodilators in mesenteric arterioles were monitored by using intravital fluorescence microscopy. The diabetic state enhanced leukocyte adhesion in mesenteric postcapillary venules (p < 0.001). Moreover, an impaired vasodilatory response to the EC-dependent vasodilator, acetylcholine (Ach), not to sodium nitroprusside (SNP), was found in 12- and 24-wk diabetic rats (p < 0.01). The leukocyte adhesion and the impairment of EC-dependent vasodilation to Ach were attenuated by exercise training (p < 0.05). In addition, exercise training was also shown to have favorable preventive effects on hyperglycemia induced oxidative stress, as lower malondialdehyde (MDA) levels were observed from both groups of 12 and 24 weeks DM+Ex compared with DM (p < 0.01). In conclusion, our findings indicate that the endothelial dysfunction of diabetic rats could be characterized by increased leukocyte adhesion and impaired endothelium-dependent relaxation. Regular low intensity exercise training could improve both indices of endothelial dysfunction through amelioration of diabetic-induced oxidant/antioxidant levels. These findings support the notion that regular exercise training could be a fundamental form of therapy in preventing diabetic cardiovascular complications potentiated by endothelial dysfunction.
Annals of Biomedical Engineering, May 14, 1991
Medicine and Science in Sports and Exercise, May 1, 2006
Cognition and Exploratory Learning in Digital Age, 2005
American Journal of Physiology-regulatory Integrative and Comparative Physiology, Feb 1, 1995
The purpose of this study was to determine whether circulating plasma protein concentration, capi... more The purpose of this study was to determine whether circulating plasma protein concentration, capillary hydraulic conductivity (Lp), and overall volume status in frogs were correlated and whether these correlations varied with season. Individual vessel Lp was thus examined on a monthly basis and correlated with changes in protein content in three body compartments (blood, lymph, and body cavity) over a 10-yr period. The frogs were anesthetized, blood and fluid samples collected, Lp assessed, and samples assayed for overall protein content. Volume status indicators varied cyclically over the course of 1 yr. Protein levels reached their peak in winter and were lowest in summer for all compartments. Lp for venular and arteriolar capillaries reached maximal levels in summer and fell steadily throughout the remainder of the year. Basal true capillary Lp was stable over the course of the year. Lp and total protein concentration were inversely proportional to each other on a seasonal basis but did not correlate on a monthly basis. Therefore, we conclude that the lack of a simple relationship between Lp and volume status suggests an independent driver such as a hormonal signal for the hydraulic conductivity.
IEICE Transactions on Information and Systems, May 1, 2008
Effective classification and analysis of semantic contents are very important for the content-bas... more Effective classification and analysis of semantic contents are very important for the content-based indexing and retrieval of video database. Our research attempts to classify movie clips into three groups of commonly elicited emotions, namely excitement, joy and sadness, based on a set of abstract-level semantic features extracted from the film sequence. In particular, these features consist of six visual and audio measures grounded on the artistic film theories. A unique sieving-structured neural network is proposed to be the classifying model due to its robustness. The performance of the proposed model is tested with 101 movie clips excerpted from 24 award-winning and well-known Hollywood feature films. The experimental result of 97.8% correct classification rate, measured against the collected human judges, indicates the great potential of using abstract-level semantic features as an engineered tool for the application of video-content retrieval/indexing.
This paper proposes the approach of zero redundancy error protection in transmitting images using... more This paper proposes the approach of zero redundancy error protection in transmitting images using Self-Organizing Maps (SOM). SOM is a kind of neural network arranging the groups of cluster input having similar characteristics adjacent to each other. SOM is used in this research to design a mapping codebook of gray levels to bit patterns such that similar levels are mapped
... For example, we try to add the EE pattern of relationship between the body part and the surro... more ... For example, we try to add the EE pattern of relationship between the body part and the surrounding objects. ... of the ACM Multimedia, France, Dec, 2002. [9] Philippe Mulhem and Joo Hwee Lim, "Home Photo Retrieval: Time Matters," Conf. ...
Proceedings of the Image and Vision …, 2000
ITC-CSCC :International Technical Conference on Circuits Systems, Computers and Communications, Jul 1, 2003
누리미디어에서 제공되는 모든 저작물의 저작권은 원저작자에게 있으며, 누리미디어는 각 저작물의 내용을 보증하거나 책임을 지지 않습니다. 단, 누리미디어에서 제공되는 서지정보는 ... more 누리미디어에서 제공되는 모든 저작물의 저작권은 원저작자에게 있으며, 누리미디어는 각 저작물의 내용을 보증하거나 책임을 지지 않습니다. 단, 누리미디어에서 제공되는 서지정보는 저작권법에 의해 보호를 받는 저작물로, 사전 허락 없이 임의로 대량 수집하거나 프로그램에 의한 주기적 ...
วารสารวิจัยและพัฒนา มจธ., Oct 26, 2012
A digital watermarking scheme, based on the spread spectrum techniques, is proposed in this paper... more A digital watermarking scheme, based on the spread spectrum techniques, is proposed in this paper. The scheme uses the frequency hopping spread spectrum technique to determine positions for watermark embedding in the original image, while the direct sequence spread spectrum technique is used to provide robustness to the watermark signal. This scheme has an advantage over the existing spread spectrum watermarking schemes, that is, various levels of watermark signal can be embedded into the original image in order to minimize the quality degradation of the watermarked image. To embed the watermark signal, the selected bits of selected pixels are used to carry the watermark signal. The performance of the watermarking scheme is evaluated by using the Peak Signal to Noise Ratio (PSNR). The experimental results indicated that the proposed scheme gained higher PSNR and, simultaneously, more watermark bits could be embedded into the original image.
E-Learn: World Conference on E-Learning in Corporate, Government, Healthcare, and Higher Education, 2003
Asian Biomedicine, Jan 26, 2010
Endothelial dysfunction has been documented as the key process of both macro-and microangiopathy ... more Endothelial dysfunction has been documented as the key process of both macro-and microangiopathy in diabetes mellitus. The development of endothelial dysfunction can be characterized by both impairment of vasorelaxation and increased expression of adhesion molecules. The increase in reactive oxygen species (ROS), subsequently produced from long-term hyperglycemia, was suggested as a major underlying cause of diabetic-induced endothelial dysfunction [1-3]. The interaction between leukocytes and endothelium is one of the markers for diabetesinduced endothelial dysfunction. Interestingly, our previous studies in diabetic rats have shown that vitamin C supplementation could reduce leukocyte-endothelial cell interactions in both experimental models of long-term preventive and early phase reversal trials [4, 5].
International Journal of Smart Engineering System Design, Oct 1, 2003
Currently, the core of Thai speech recognition algorithms focuses on word recognition. However, s... more Currently, the core of Thai speech recognition algorithms focuses on word recognition. However, such algorithms are not appropriate to construct the Speech-to-Text system since the ultimate goal in Speech-to-Text system is to recognize continuous speech states from any speaker of a given language. The meaning in each given language and its sound can be determined by phonemes which are slightly different for each language. The variability in each speaker's voice, for instance, accents, gender and speech style, and the tonal language such as Thai language can create rather different speech signals for the same word. Thus, phoneme recognition is more dif¢cult to perform. Since segmentation takes place prior to recognition in such systems, an incorrect segmentation invariably leads to incorrect recognition results. We proposed a method for phoneme segmentation that based on Discrete Wavelet Transform (DWT). To verify our method, we performed experiments on eleven speakers: ¢ve males and six females. Each speaker pronounced one hundred and thirty Thai words. Then, we evaluated the performance of our method by synthesizing the new words from the obtained phonemes. The speech synthesis of the new words was then observed by humans to compare with the natural-sounding speech. The results indicated 95% accuracy.
PubMed, 2005
The protective effects of exercise training on the diabetic-induced endothelial cell (EC) dysfunc... more The protective effects of exercise training on the diabetic-induced endothelial cell (EC) dysfunction were determined using intravital fluorescent microscopy. Male Sprague-Dawley rats were divided into three groups of control (Con), diabetes (DM), and diabetes with exercise--training (DM+Ex). Diabetes was induced by single intravenous injection of streptozotocin (STZ; 50 mg/kg BW). The exercise training protocol consisted of treadmill running, 5 times/week with the velocity of 13-15 m/min, 30 min/day periods for 12 and 24 weeks (wks). 24 wks after the STZ injection, blood glucose (BG), glycosylated hemoglobin (HbA1C), mean arterial blood pressure (MAP) and heart weight (HW) were significantly higher in DM rats (p < 0.001). However, DM+Ex rats had reduced the abnormalities of MAP (p < 0.01) and HW (p < 0.05) compared with DM rats. Furthermore, there was a significant decrease in heart rate (HR) of DM+Ex rats (p < 0.05) relative to Con rats. To examine the influence of exercise training on EC dysfunction, leukocyte-EC interactions in mesenteric venules and vascular reactivity responses to vasodilators in mesenteric arterioles were monitored by using intravital fluorescence microscopy. The diabetic state enhanced leukocyte adhesion in mesenteric postcapillary venules (p < 0.001). Moreover, an impaired vasodilatory response to the EC-dependent vasodilator, acetylcholine (Ach), not to sodium nitroprusside (SNP), was found in 12- and 24-wk diabetic rats (p < 0.01). The leukocyte adhesion and the impairment of EC-dependent vasodilation to Ach were attenuated by exercise training (p < 0.05). In addition, exercise training was also shown to have favorable preventive effects on hyperglycemia induced oxidative stress, as lower malondialdehyde (MDA) levels were observed from both groups of 12 and 24 weeks DM+Ex compared with DM (p < 0.01). In conclusion, our findings indicate that the endothelial dysfunction of diabetic rats could be characterized by increased leukocyte adhesion and impaired endothelium-dependent relaxation. Regular low intensity exercise training could improve both indices of endothelial dysfunction through amelioration of diabetic-induced oxidant/antioxidant levels. These findings support the notion that regular exercise training could be a fundamental form of therapy in preventing diabetic cardiovascular complications potentiated by endothelial dysfunction.
Annals of Biomedical Engineering, May 14, 1991
Medicine and Science in Sports and Exercise, May 1, 2006
Cognition and Exploratory Learning in Digital Age, 2005
American Journal of Physiology-regulatory Integrative and Comparative Physiology, Feb 1, 1995
The purpose of this study was to determine whether circulating plasma protein concentration, capi... more The purpose of this study was to determine whether circulating plasma protein concentration, capillary hydraulic conductivity (Lp), and overall volume status in frogs were correlated and whether these correlations varied with season. Individual vessel Lp was thus examined on a monthly basis and correlated with changes in protein content in three body compartments (blood, lymph, and body cavity) over a 10-yr period. The frogs were anesthetized, blood and fluid samples collected, Lp assessed, and samples assayed for overall protein content. Volume status indicators varied cyclically over the course of 1 yr. Protein levels reached their peak in winter and were lowest in summer for all compartments. Lp for venular and arteriolar capillaries reached maximal levels in summer and fell steadily throughout the remainder of the year. Basal true capillary Lp was stable over the course of the year. Lp and total protein concentration were inversely proportional to each other on a seasonal basis but did not correlate on a monthly basis. Therefore, we conclude that the lack of a simple relationship between Lp and volume status suggests an independent driver such as a hormonal signal for the hydraulic conductivity.
IEICE Transactions on Information and Systems, May 1, 2008
Effective classification and analysis of semantic contents are very important for the content-bas... more Effective classification and analysis of semantic contents are very important for the content-based indexing and retrieval of video database. Our research attempts to classify movie clips into three groups of commonly elicited emotions, namely excitement, joy and sadness, based on a set of abstract-level semantic features extracted from the film sequence. In particular, these features consist of six visual and audio measures grounded on the artistic film theories. A unique sieving-structured neural network is proposed to be the classifying model due to its robustness. The performance of the proposed model is tested with 101 movie clips excerpted from 24 award-winning and well-known Hollywood feature films. The experimental result of 97.8% correct classification rate, measured against the collected human judges, indicates the great potential of using abstract-level semantic features as an engineered tool for the application of video-content retrieval/indexing.
This paper proposes the approach of zero redundancy error protection in transmitting images using... more This paper proposes the approach of zero redundancy error protection in transmitting images using Self-Organizing Maps (SOM). SOM is a kind of neural network arranging the groups of cluster input having similar characteristics adjacent to each other. SOM is used in this research to design a mapping codebook of gray levels to bit patterns such that similar levels are mapped
... For example, we try to add the EE pattern of relationship between the body part and the surro... more ... For example, we try to add the EE pattern of relationship between the body part and the surrounding objects. ... of the ACM Multimedia, France, Dec, 2002. [9] Philippe Mulhem and Joo Hwee Lim, "Home Photo Retrieval: Time Matters," Conf. ...