Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Contactless Respiratory Waveform Estimation Using a Depth Camera and AI-Based Body Detection.

Sensors (Basel, Switzerland)·2026
Same author

Long-term local recurrence and survival after colorectal endoscopic submucosal dissection: a prospective multicenter real-world cohort study.

Endoscopy·2026
Same author

Self-assembling peptide hydrogel prevents esophageal stenosis after endoscopic submucosal dissection for esophageal squamous cell carcinoma: Multicenter prospective study.

Endoscopy international open·2026
Same author

Long-Term Outcomes After Endoscopic Submucosal Dissection for T1 Colorectal Cancer: A Multicenter Prospective Study.

Clinical gastroenterology and hepatology : the official clinical practice journal of the American Gastroenterological Association·2026
Same author

Predicting mucosal healing in patients with ulcerative colitis in clinical remission using biomarkers: A single-center prospective pilot study.

Medicine·2026
Same author

Resection Depth of Underwater Versus Conventional Endoscopic Mucosal Resection for Intermediate-Sized Colorectal Tumors.

The American journal of gastroenterology·2026

Related Experiment Video

Updated: Mar 23, 2026

Author Spotlight: Assessment of Visual Acuity in Central Vision Loss Through Motion-Based Peripheral Vision Testing
06:25

Author Spotlight: Assessment of Visual Acuity in Central Vision Loss Through Motion-Based Peripheral Vision Testing

Published on: February 23, 2024

1.2K

Defocus-aware Dirichlet particle filter for stable endoscopic video frame recognition.

Tsubasa Hirakawa1, Toru Tamaki1, Bisser Raytchev1

  • 1Department of Information Engineering, Graduate School of Engineering, Hiroshima University, 1-4-1 Kagamiyama, Higashi-Hiroshima, Hiroshima 739-8527, Japan.

Artificial Intelligence in Medicine
|April 8, 2016
PubMed
Summary

A new defocus-aware Dirichlet particle filter (D-DPF) improves real-time diagnostic support in colorectal endoscopy by stabilizing frame-wise classification results. This method effectively smooths unstable probability curves caused by out-of-focus frames.

Keywords:
Colorectal cancerDefocus informationDirichlet distributionEndoscopyParticle filter

More Related Videos

Medical-grade Sterilizable Target for Fluid-immersed Fetoscope Optical Distortion Calibration
07:03

Medical-grade Sterilizable Target for Fluid-immersed Fetoscope Optical Distortion Calibration

Published on: February 23, 2017

8.1K
Digital Inline Holographic Microscopy DIHM of Weakly-scattering Subjects
10:16

Digital Inline Holographic Microscopy DIHM of Weakly-scattering Subjects

Published on: February 8, 2014

12.7K

Related Experiment Videos

Last Updated: Mar 23, 2026

Author Spotlight: Assessment of Visual Acuity in Central Vision Loss Through Motion-Based Peripheral Vision Testing
06:25

Author Spotlight: Assessment of Visual Acuity in Central Vision Loss Through Motion-Based Peripheral Vision Testing

Published on: February 23, 2024

1.2K
Medical-grade Sterilizable Target for Fluid-immersed Fetoscope Optical Distortion Calibration
07:03

Medical-grade Sterilizable Target for Fluid-immersed Fetoscope Optical Distortion Calibration

Published on: February 23, 2017

8.1K
Digital Inline Holographic Microscopy DIHM of Weakly-scattering Subjects
10:16

Digital Inline Holographic Microscopy DIHM of Weakly-scattering Subjects

Published on: February 8, 2014

12.7K

Area of Science:

  • Medical imaging
  • Computer-aided diagnosis
  • Endoscopy

Background:

  • Computer-aided systems offer diagnostic support in colorectal endoscopy.
  • Real-time classification of endoscopic video frames is unstable due to out-of-focus images.

Purpose of the Study:

  • To develop a robust method for stabilizing frame-wise classification in endoscopic videos.
  • To address the instability caused by out-of-focus frames in real-time endoscopic diagnosis.

Main Methods:

  • A defocus-aware Dirichlet particle filter (D-DPF) was developed, integrating a particle filter with Dirichlet distribution and defocus information.
  • Defocus information was incorporated using isolated pixel ratios to sample from a Rayleigh distribution.

Main Results:

  • The D-DPF demonstrated superior robustness against classification instability compared to a Kalman filter and a D-DPF without defocus information.
  • The method achieved a computation time of approximately 88ms/frame, suitable for real-time applications.
  • The D-DPF effectively smoothed unstable probability curves in real endoscopic videos affected by defocus.

Conclusions:

  • The proposed D-DPF is a valuable tool for enhancing the stability of frame-wise classification in endoscopic videos.
  • This method supports more reliable real-time diagnosis during endoscopic examinations.