A Review of the Evolution of Vision-Based Motion Analysis and the Integration of Advanced Computer Vision Methods Towards Developing a Markerless System

Colyer, Steffi L.; Evans, Murray; Cosker, Darren; Salo, Aki

doi:10.1186/s40798-018-0139-y

Cited by 392 publications

(303 citation statements)

References 111 publications

(124 reference statements)

Supporting

Mentioning

298

Contrasting

Unclassified

Order By: Relevance

“…Brockerhoff et al, 1995;Mirat et al, 2013). Machine learning and other frontiers in image processing offer opportunities for the development of sophisticated software for automating kinematic measurements (Colyer et al, 2018;Robie et al, 2017). However, a more direct and robust approach to automation may be obtained from video recordings of subjects that are illuminated with high contrast.…”

Section: Resultsmentioning

confidence: 99%

Multichannel Stroboscopic Videography (MSV): A technique for visualizing multiple channels for behavioral measurements

Soto

McHenry

2019

Journal of Experimental Biology

View full text Add to dashboard Cite

Biologists commonly visualize different features of an organism using distinct sources of illumination. Such multichannel imaging has largely not been applied to behavioral studies because of the challenges posed by a moving subject. We address this challenge with the technique of multichannel stroboscopic videography (MSV), which synchronizes multiple strobe lights with video exposures of a single camera. We illustrate the utility of this approach with kinematic measurements of a walking cockroach (Gromphadorhina portentosa) and calculations of the pressure field around a swimming fish (Danio rerio). In both, transmitted illumination generated high-contrast images of the animal's body in one channel. Other sources of illumination were used to visualize the points of contact for the feet of the cockroach and the water flow around the fish in separate channels. MSV provides an enhanced potential for high-throughput experimentation and the capacity to integrate changes in physiological or environmental conditions in freely-behaving animals.

show abstract

Section: Resultsmentioning

confidence: 99%

Multichannel Stroboscopic Videography (MSV): A technique for visualizing multiple channels for behavioral measurements

Soto

McHenry

2019

Journal of Experimental Biology

View full text Add to dashboard Cite

show abstract

“…Recent developments in movement analysis use markerless silhouette technology to create a 3D image of a body from twodimensional (2D) video recordings (e.g. Simi Reality Motion Systems, Germany; Microsoft Kinect V2, USA) [5]. The silhouette of the body is captured by several calibrated conventional video cameras from different angles (▶ Fig.…”

Section: Silhouette Trackingmentioning

confidence: 99%

“…6 a). A calculation model creates a 3D point cloud or a raster model from the 2D data of the cameras, which describe colours, as well as brightness or the distance of a point ("depth map") [5]. This whole-body model is divided into rigid segments with articulated connections (as in MBS).…”

Section: Silhouette Trackingmentioning

confidence: 99%

See 1 more Smart Citation

Movement Analysis in Orthopedics and Trauma Surgery – Measurement Systems and Clinical Applications

et al. 2019

View full text Add to dashboard Cite

Background Technical development lead to an enhancement of clinical movement analysis in the last few decades and expanded its research and clinical applications. Since the mid 20th century, human movement analysis has made its way into clinical practice, e.g. in treating poliomyelitis and infantile cerebral palsy. Today, it has a wide range of applications in various clinical areas. The aim of this narrative review is to illustrate the variety of camera-based systems for human movement analysis and their clinical applications, specifically in the field of orthopaedics and trauma surgery (O/U). Benefits and limitations of each system are shown. Future development and necessary improvements are discussed. Material and Methods A selective literature review was undertaken with the databases PubMed and Google Scholar using keywords related to clinical human movement analysis in the field of orthopaedics and trauma surgery. Furthermore standard book references were included. Results Common video camera systems (VS) are used for basic visual movement analysis. Instrumented movement analysis systems include marker-based systems (MBS), markerless optical systems (MLS) and rasterstereographic analysis systems (VRS). VS, MBS and MLS have clinical use for dynamic examination of patients with various disorders in movement and gait. Among such are e.g. neuro-orthopaedic disorders, muscular insufficiencies, degenerative and post-trauma deficiencies with e.g. resultant pathologic leg axis. Besides the measurement of kinematic data by MBS and MLS, the combination with kinetic measurements to detect abnormal loading patterns as well as the combination with electromyography (EMG) to detect abnormal muscle function is a great advantage. Validity and reliability of kinematic measurements depend on the camera systems (MBS, MLS), the applied marker models, the joints of interest and the observed movement plane. Movements in the sagittal plane of the hip and knee joint, pelvic rotation and tilt as well as hip abduction are generally measured with high reliability. In the frontal and transverse planes of the knee and ankle joint substantial angular variabilities were noted due to the small range of motion of the joints in these planes. Soft tissue artefacts and marker placement are the biggest sources of errors. So far MLS did not improve these limitations. MBS are most accurate and remain the gold-standard in clinical and scientific movement analysis. VRS is used clinically for static 3D-analysis of the trunk posture and spine deformities. Current systems allow the dynamic measurement and visualisation of trunk and spine movement in 3D during gait and running. Planar x-ray-imaging (Cobbʼs angle) and to some extent cross sectional imaging with CT-scan or MRI are commonly used for the evaluation of patients with spinal deformities. VRS offers functional 3D data of trunk and spine deformities without radiation exposure, thus allowing safer clinical monitoring of the mainly infantile and adolescent patients. The accuracy, validity and reliability of measurements of different VRS-systems for the clinical use has been proven by several studies. Conclusion The instrumented movement analysis is an additional tool that aids clinical practitioners of O/U in the dynamic assessment of pathologic movement and loading patterns. In conjunction with common radiologic imaging it aids in the planning of type and extent of corrective surgical interventions. In the field of orthopaedics and trauma surgery movement analysis can help as an additional diagnostic tool to develop therapeutic strategies and evaluate clinical outcomes.

show abstract

“…3-D motion capture plays an important role in sports to analyze physical limitations and for movement optimization [11]. Through the analyses, details about injury mechanism and movement will lead to new preventive methods and be used to improve a player's technique and performance [12].…”

Section: Introductionmentioning

confidence: 99%

Single-leg Standing Ability and Lower Limb Movement Analysis of Collegiate Footballers and Sedentary Students

Lau¹,

Tan²,

Vahidi³

et al. 2020

Adv. sci. technol. eng. syst. j.

View full text Add to dashboard Cite

Stability or balance is an integral component to perform daily activities without incurring injury or to be dependent on others. Sportsmen tend to have better balance than non-sports people but less is known about the single-leg balance ability. Furthermore, few studies analyzed the dynamic phase of single-leg stance that may contribute to better overall balance. Sports like football tend to have instances where the player's non-dominant leg keeps them in an upright position while the dominant leg kicks, passes and stops the ball. We aim to study the single-leg balance between collegiate footballers and sedentary students in eyes-closed (EC) and eyes-opened (EO) conditions and their contributing components to keep a body in an up-right position. Twenty collegiate footballers and 20 sedentary students conducted the unipedal stance test (UPST) on each leg with EO and EC conditions while standing on a force platform. We captured center of pressure (CoP) distance travelled, stance duration and using a 3D motion capture system, we assessed lower limb movement at six different anatomical sites. Results showed that footballers had better overall balance compared to sedentary students only in the non-dominant leg, EC condition with 12 footballers versus four sedentary students completing the full 45s stance (p=0.01) The other three UPST conditions did not show significant differences between groups. The CoP distance in the initial dynamic state and total UPST were both significantly shorter in footballers than sedentary students (p<0.05) during the nondominant leg, EC stance. Our multivariable linear regression model significantly predicted time for UPST on non-dominant leg with EC up to 76.8% (p<0.001) with the first 5-s of greater trochanter movement significantly contributing to total time taken for UPST in footballers. Overall, playing football may enhance balance control intrinsically especially for the non-dominant side while being less reliant on visual input to maintain balance.

show abstract

A Review of the Evolution of Vision-Based Motion Analysis and the Integration of Advanced Computer Vision Methods Towards Developing a Markerless System

Cited by 392 publications

References 111 publications

Multichannel Stroboscopic Videography (MSV): A technique for visualizing multiple channels for behavioral measurements

Multichannel Stroboscopic Videography (MSV): A technique for visualizing multiple channels for behavioral measurements

Movement Analysis in Orthopedics and Trauma Surgery – Measurement Systems and Clinical Applications

Single-leg Standing Ability and Lower Limb Movement Analysis of Collegiate Footballers and Sedentary Students

Contact Info

Product

Resources

About