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Related Concept Videos

Regulation of Pulse01:20

Regulation of Pulse

Pulse regulation involves physiological mechanisms that ensure adequate blood flow throughout the body. The heartbeat, regulated by the autonomic nervous system, is influenced by hormonal balance, physical activity, and emotional state.
Pulse rhythm01:30

Pulse rhythm

Pulse rhythm refers to the pattern of pulsations within specific intervals, offering valuable insights into the regularity or irregularity of the heart's beats as observed through the pattern of pulsation within specific intervals. A regular pulse exhibits a consistent heart rate with uniform waveforms and pulsation force, variations of which can be classified as normal, weak, or bounding.
Conversely, an irregular pulse pattern is termed dysrhythmia, stemming from disruptions in cardiac muscle...
Pulse01:16

Pulse

When the heart pumps blood out, arterial elastic fibers play a crucial role in sustaining a high-pressure gradient. They expand to accommodate the received blood and then recoil - a process known as the pulse that can be either manually palpated or electronically quantified. Despite a reduction in its effect with increased distance from the heart, elements of the pulse's systolic and diastolic components persist, observable even at the arteriole level.
The pulse serves as a clinical indicator...
Pulse01:05

Pulse

The pulse is one of the most fundamental physiological indicators of the body's cardiovascular health. It is the rhythmic expansion and contraction of the arterial walls in response to the pressure generated by the heart's pumping action.
Pulse Rate and its Significance
Pulse rate, often measured in beats per minute (bpm), reflects the heart rate (HR), which is influenced by numerous factors such as stress, physical activity, and hormonal changes. A normal resting adult pulse rate falls between...
Hardy-Weinberg Principle01:49

Hardy-Weinberg Principle

Diploid organisms have two alleles of each gene, one from each parent, in their somatic cells. Therefore, each individual contributes two alleles to the gene pool of the population. The gene pool of a population is the sum of every allele of all genes within that population and has some degree of variation. Genetic variation is typically expressed as a relative frequency, which is the percentage of the total population that has a given allele, genotype or phenotype.
Increased pulse rate01:17

Increased pulse rate

Tachycardia is a condition marked by an abnormally fast or irregular heart rate, surpassing the typical resting rate. In adults, tachycardia is characterized by a pulse rate ranging from 100 to 180 beats per minute. The increased heart rate can result in inadequate blood flow to various body parts, ultimately diminishing the oxygen supply to organs and tissues.
Many factors can elevate the risk of developing tachycardia. These include advanced age, a family history of arrhythmias, and an...

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Related Experiment Video

Updated: May 10, 2026

Calculating Heart Rate Variability from ECG Data from Youth with Cerebral Palsy During Active Video Game Sessions
08:12

Calculating Heart Rate Variability from ECG Data from Youth with Cerebral Palsy During Active Video Game Sessions

Published on: June 5, 2019

Robust pulse rate from chrominance-based rPPG.

Gerard de Haan, Vincent Jeanne

    IEEE Transactions on Bio-Medical Engineering
    |June 8, 2013
    PubMed
    Summary

    New chrominance-based methods significantly improve remote photoplethysmography (rPPG) for contactless pulse monitoring. These advancements enhance motion robustness, expanding rPPG

    Area of Science:

    • Biomedical Engineering
    • Signal Processing
    • Optical Sensing

    Background:

    • Remote photoplethysmography (rPPG) offers contactless blood volume pulse monitoring.
    • Existing motion-robust techniques using blind source separation (BSS) in RGB color space have shown limited efficacy.
    • Improving motion robustness is critical for wider rPPG application.

    Purpose of the Study:

    • To analyze the motion problem in rPPG and develop superior motion-robust methods.
    • To evaluate the performance of novel chrominance-based rPPG techniques against existing BSS methods.
    • To assess the effectiveness of these methods in both stationary and dynamic (fitness) environments.

    Main Methods:

    • Analysis of the motion artifact problem in rPPG.
    • Development and implementation of chrominance-based signal processing techniques.

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  • Validation against contact photoplethysmography (PPG) in stationary subjects.
  • Performance evaluation in fitness settings with varying motion intensity (cycling, stepping).

    • Main Results:

    • Chrominance-based methods demonstrate significantly better performance than BSS techniques.
    • In stationary subjects, 92% agreement with contact PPG was achieved, with RMSE and standard deviation twice as good as BSS methods.
    • Pulse rate accuracy improved from 79% to 98% for modest motion (cycling) and from <11% to >48% for vigorous motion (stepping).

    Conclusions:

    • Chrominance-based approaches represent a substantial advancement in rPPG motion robustness.
    • The improved accuracy and robustness considerably expand the potential applications of contactless PPG technology.
    • This work paves the way for more reliable remote physiological monitoring in diverse real-world scenarios.