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

Factors Influencing Attraction IV: Reciprocity01:28

Factors Influencing Attraction IV: Reciprocity

Reciprocity in attraction is fundamental to social and romantic relationships, shaping how individuals form and maintain connections. The psychological principle underlying this phenomenon is that people tend to like those who express liking toward them. Balance theory supports this tendency, suggesting that mutual attraction fosters psychological harmony, whereas one-sided affection leads to discomfort and cognitive dissonance.The Psychological Mechanisms Behind ReciprocityWhen individuals...
Methods of Documentation IV: Focus Charting01:26

Methods of Documentation IV: Focus Charting

Focus Charting, also known as the focus charting system or "focus documentation," is a systematic documentation approach used in healthcare to organize patient information in medical records.
It typically involves three columns for recording information:
Focusing of Light in the Eye01:16

Focusing of Light in the Eye

Light rays enter the eye through the cornea, a transparent dome-shaped tissue that is the eye's outermost layer. The cornea bends or refracts, light rays traveling to the pupil. The shape of the cornea determines how much of the light is bent and whether the image will be focused correctly on the retina at the back of the eye. Once the light has passed through both refraction layers, it converges into a single focal point onto a small area. This is where photoreceptors start transforming...
Profile Leveling and Cross Sections01:26

Profile Leveling and Cross Sections

Profile leveling and cross-sections are surveying methods used to determine and document terrain elevations for infrastructure projects such as highways, railroads, canals, and pipelines. These methods provide data for earthwork planning and alignment of proposed routes.  Profile leveling involves measuring elevations along a fixed line to create a vertical terrain profile. A surveyor sets up a leveling instrument at the benchmark (BM) and records a backsight (BS) to determine the instrument's...
Facial Feedback Hypothesis01:24

Facial Feedback Hypothesis

Charles Darwin proposed that facial expressions are an evolutionary adaptation for communication. He argued that these expressions are not influenced by culture but are universal across species. For example, a snarling expression with exposed teeth signals a threat in many animals, including humans. Darwin also suggested that displaying an emotion can intensify the feeling. Smiling, for example, could enhance one's sense of happiness. This idea laid the foundation for understanding the role of...
Techniques of Therapeutic Communication II: Focusing, Paraphrasing, and Summarizing01:23

Techniques of Therapeutic Communication II: Focusing, Paraphrasing, and Summarizing

Focusing involves centering a conversation on a message's critical elements or concepts. Focusing is valuable if the talk is vague or patients begin to repeat themselves. Sometimes, when patients are asked about their symptoms, they may go off-topic and try to tell their entire life story. Respectfully, the nurse should bring the conversation back into focus.
This therapeutic technique can also be used when a patient brings up pertinent information during a health-related conversation. The...

You might also read

Related Articles

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

Sort by
Same author

Comparison of User Performance and Experience Between Light Field and Conventional AR Glasses.

IEEE transactions on visualization and computer graphics·2025
Same author

Generating Light Field From Stereo Images for AR Display With Matched Angular Sampling Structure and Minimal Retinal Error.

IEEE transactions on image processing : a publication of the IEEE Signal Processing Society·2025
Same author

Quantitative assessment of <i>in vivo</i> nuclei and layers of human skin by deep learning-based OCT image segmentation.

Biomedical optics express·2025
Same author

Geometric lightguide for near-eye light field displays.

Applied optics·2024
Same author

Training With Uncertain Annotations for Semantic Segmentation of Basal Cell Carcinoma From Full-Field OCT Images.

IEEE transactions on medical imaging·2023
Same author

Toward cell nuclei precision between OCT and H&E images translation using signal-to-noise ratio cycle-consistency.

Computer methods and programs in biomedicine·2023
Same journal

Style-Aware Contrastive Test-Time Adaptation: A Dual-Cache Model for Robust Vision-Language Alignment.

IEEE transactions on image processing : a publication of the IEEE Signal Processing Society·2026
Same journal

Semantic Frame Interpolation.

IEEE transactions on image processing : a publication of the IEEE Signal Processing Society·2026
Same journal

Physics-Guided Cross-Modal Decoupling with Test-Time Adaptation for Hyperspectral Image Restoration.

IEEE transactions on image processing : a publication of the IEEE Signal Processing Society·2026
Same journal

Change-Prior-Guided Unsupervised Change Detection of Heterogeneous Remote Sensing Images.

IEEE transactions on image processing : a publication of the IEEE Signal Processing Society·2026
Same journal

AgonicDreamer: Enhancing Multi-View Consistency in Text-to-3D Generation via Rectified Score Distillation.

IEEE transactions on image processing : a publication of the IEEE Signal Processing Society·2026
Same journal

BiCM-Prompt: Bidirectional Cross-Modal Prompt Tuning for Class-Incremental Learning on Multisource Remote Sensing Images.

IEEE transactions on image processing : a publication of the IEEE Signal Processing Society·2026
See all related articles

Related Experiment Video

Updated: May 30, 2026

RBDT: A Computerized Task System based in Transposition for the Continuous Analysis of Relational Behavior Dynamics in Humans
11:09

RBDT: A Computerized Task System based in Transposition for the Continuous Analysis of Relational Behavior Dynamics in Humans

Published on: July 17, 2021

Reciprocal focus profile.

Dong-Chen Tsai1, Homer H Chen

  • 1Graduate Institute of Communication Engineering, National Taiwan University, Taipei 10617, Taiwan. youngvegetable@yahoo.com.tw

IEEE Transactions on Image Processing : a Publication of the IEEE Signal Processing Society
|August 17, 2011
PubMed
Summary
This summary is machine-generated.

A new focus profile representation improves autofocus (AF) speed in digital cameras. By transforming the focus profile, the system gains mathematical tractability and faster lens searching, even with noise-resistant profiles.

More Related Videos

Eye Tracking During Visually Situated Language Comprehension: Flexibility and Limitations in Uncovering Visual Context Effects
07:36

Eye Tracking During Visually Situated Language Comprehension: Flexibility and Limitations in Uncovering Visual Context Effects

Published on: November 30, 2018

Multifocal Electroretinograms
16:49

Multifocal Electroretinograms

Published on: December 4, 2011

Related Experiment Videos

Last Updated: May 30, 2026

RBDT: A Computerized Task System based in Transposition for the Continuous Analysis of Relational Behavior Dynamics in Humans
11:09

RBDT: A Computerized Task System based in Transposition for the Continuous Analysis of Relational Behavior Dynamics in Humans

Published on: July 17, 2021

Eye Tracking During Visually Situated Language Comprehension: Flexibility and Limitations in Uncovering Visual Context Effects
07:36

Eye Tracking During Visually Situated Language Comprehension: Flexibility and Limitations in Uncovering Visual Context Effects

Published on: November 30, 2018

Multifocal Electroretinograms
16:49

Multifocal Electroretinograms

Published on: December 4, 2011

Area of Science:

  • Digital imaging and camera technology
  • Image processing and computer vision

Background:

  • Steeper focus profiles enhance autofocus (AF) noise resistance but create ambiguous out-of-focus regions, slowing down the AF process.
  • Current AF systems struggle with flat regions in focus profiles, lacking clear directional cues for lens movement.

Purpose of the Study:

  • To develop a novel focus profile representation for faster and more robust autofocusing in digital cameras.
  • To address the limitations of traditional focus profiles in accurately guiding lens movement in flat regions.

Main Methods:

  • Statistical analysis of focus profiles to understand their properties.
  • Introduction of a strictly monotonic transformation to preserve AF accuracy.
  • Modeling the transformed focus profile in the reciprocal domain using polynomial functions.

Main Results:

  • The proposed transformation preserves the accuracy of the autofocus process.
  • The reciprocal domain representation makes autofocus mathematically tractable.
  • Experimental results demonstrate a significant boost in autofocus search speed.

Conclusions:

  • The novel focus profile representation offers a mathematically tractable and efficient solution for autofocusing.
  • This approach enhances autofocus performance, particularly in challenging scenarios with flat focus profile regions.