Object Detection System Aggarwal, Sahil; Bala, Shantanu; Baluni, Siddharth ...
Indian Journal of Computer Science and Technology,
05/2024
Journal Article
Object detection is a critical component of computer vision, with significant applications across various domains. The challenges associated with real-world images, including noise, blurring, and ...rotational jitter, substantially impact the performance of object detection algorithms. YOLO (You Only Look Once), an algorithm grounded in convolutional neural networks, offers real-time object detection capabilities. This paper delves into several enhancements made to the YOLO network, aimed at augmenting the precision and efficiency of object detection tasks. The advancements discussed include optimizing the architecture of YOLO to handle diverse environmental conditions and integrating state-of-the-art techniques to mitigate common image distortions. Moreover, the paper explores the application of light field cameras to enhance depth perception and object localization. By refining the YOLO network, we aim to push the boundaries of real-time detection accuracy and reliability, crucial for applications ranging from autonomous vehicles to security surveillance systems.
This paper presents a haptic interface for augmenting human-human interpersonal interactions by delivering facial expressions of an interaction partner to an individual using a visual-to-tactile ...mapping of facial action units. Pancake shaftless vibration motors are mounted on the back of a chair to provide vibrotactile stimulation in the context of a dyadic (one-on-one) interaction across a table. This work explores the design of spatiotemporal vibration patterns that can be used to convey the basic building blocks of facial movements according to the Facial Action Unit Coding System. A behavioral study was conducted to explore the factors that influence the naturalness of conveying affect using vibrotactile cues.
VibroGlove Krishna, Sreekar; Bala, Shantanu; McDaniel, Troy ...
CHI '10 Extended Abstracts on Human Factors in Computing Systems,
04/2010
Conference Proceeding
In this paper, a novel interface is described for enhancing human-human interpersonal interactions. Specifically, the device is targeted as an assistive aid to deliver the facial expressions of an ...interaction partner to people who are blind or visually impaired. Vibro-tactors, mounted on the back of a glove, provide a means for conveying haptic emoticons that represent the six basic human emotions and the neutral expression of the user's interaction partner. The detailed design of the haptic interface and haptic icons of expressions are presented, along with a user study involving a subject who is blind, as well as sighted, blind-folded participants. Results reveal the potential for enriching social communication for people with visual disabilities.
Outpatient stroke rehabilitation is often lengthy and expensive due to patients' lack of functional use of the impaired arm outside of the clinic caused by "learned non-use." Learned non-use is ...detrimental to stroke recovery, often resulting in chronic disability. To overcome learned non-use, a wearable "personal assistant" solution is proposed that employs ubiquitous cueing to stimulate patient use of the paretic arm while outside of therapy sessions. A pilot user study is presented that evaluated stroke survivors' tolerance and acceptance of cueing, and the usability of the proposed implementation.
Feedback related to motor performance is integral to improving the control, timing and coordination of movements. However, motor learning traditionally occurs within a group setting, limiting the ...quality of instruction and feedback. Even during one-on-one instruction, there are impediments to feedback such as physical separation between trainer and trainee, common in many sports such as snowboarding and swimming. We propose an inexpensive solution for real-time vibrotactile positioning and speed feedback that can complement traditional motor learning, and is compatible with existing vibrotactile motor instructions. We present a psychophysical study that examined participants' initial reactions to feedback stimuli pertaining to position and speed adjustments. Results support the proposed design in terms of both usability and naturalness, and provide insight into participants' conceptualization of feedback signals and feedback for rotational movements.
Outpatient stroke rehabilitation is often lengthy and expensive due to patients' lack of functional use of the impaired arm outside of the clinic caused by "learned non-use." Learned non-use is ...detrimental to stroke recovery, often resulting in chronic disability. To overcome learned non-use, a wearable "personal assistant" solution is proposed that employs ubiquitous cueing to stimulate patient use of the paretic arm while outside of therapy sessions. A pilot user study is presented that evaluated stroke survivors' tolerance and acceptance of cueing, and the usability of the proposed implementation.
In this paper, an face-tracking camera-based assistive technology is presented for extracting head and face based gestures which are delivered to individuals who are blind. The interface is capable ...of tracking the head and face of an interaction partner and delivering them through the recently developed VibroGlove interface. The construction of the interface as well as its application are detailed.
In this paper, a novel haptic interface is presented for exploring the dorsal surface of the finger phalanges as visuo-haptic sensory substitution modality. The constructional details of the proposed ...haptic glove are detailed along with two experiments that explore vibrotactile localization and spatio-temporal cue identification among users who are blind and sighted, but blind-folded. The use of the dorsal surface of the fingers ensures that there is no functional inconvenience to the fingers or the hand. The results of the experiments are promising and offer an effective means for delivering high intensity (bandwidth) visual data in auxiliary sensory channels when vision is deprived or overloaded.
Oxygen-compromised environments, such as high altitude, air travel, and sports, and pathological conditions, such as solid tumors, have been suggested to be prothrombotic. Despite the indispensable ...role of platelets in thrombus formation, the studies linking hypoxia, platelet reactivity, and thrombus formation are limited. In the present study, platelet proteome/reactivity was analyzed to elucidate the acute hypoxia-induced prothrombotic phenotype. Rats exposed to acute simulated hypoxia (282 torr/8% oxygen) demonstrated a decreased bleeding propensity and increased platelet reactivity. Proteomic analysis of hypoxic platelets revealed 27 differentially expressed proteins, including those involved in coagulation. Among these proteins, calpain small subunit 1, a 28-kDa regulatory component for calpain function, was significantly upregulated under hypoxic conditions. Moreover, intraplatelet Ca2+ level and platelet calpain activity were also found to be in accordance with calpain small subunit 1 expression. The inhibition of calpain activity demonstrated reversal of hypoxia-induced platelet hyperreactivity. The prothrombotic role for calpain was further confirmed by an in vivo model of hypoxia-induced thrombosis. Interestingly, patients who developed thrombosis while at extreme altitude had elevated plasma calpain activities and increased soluble P-selectin level. In summary, this study suggests that augmented calpain activity is associated with increased incidence of thrombosis under hypoxic environments.
•Hypoxia induces altered platelet proteome/reactivity, which correlates with a prothrombotic phenotype.•CAPNS1-dependent calpain activity in platelet activation cascade is associated with hypoxia-induced thrombogenesis.
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