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Related Concept Videos

Attribution01:26

Attribution

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In social interactions, individuals frequently seek to understand the motivations and causes behind others' behaviors. This fundamental aspect of social perception, known as attribution, plays a crucial role in shaping interpersonal relationships and guiding future actions. Attribution refers to the cognitive process through which people infer the reasons behind others' behaviors, allowing them to assess character traits, intentions, and situational influences.Attribution Theory and Its...
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Attribution Theory00:56

Attribution Theory

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Behavior is a product of both the situation (e.g., cultural influences, social roles, and the presence of bystanders) and of the person (e.g., personality characteristics). Subfields of psychology tend to focus on one influence or behavior over others. Situationism is the view that our behavior and actions are determined by our immediate environment and surroundings. In contrast, dispositionism holds that our behavior is determined by internal factors (Heider, 1958).
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When light of a particular wavelength strikes a metal surface, electrons are emitted. This is called the photoelectric effect. The minimum frequency of light that can cause such emission of electrons is called the threshold frequency, which is specific to the metal. Light with a frequency lower than the threshold frequency, even if it is of high intensity, cannot initiate the emission of electrons. However, when the frequency is higher than the threshold value, the number of electrons ejected...
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Theory of Attribution I: Correspondent Inference Theory01:15

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Correspondent inference theory, proposed by Jones and Davis in 1965, seeks to explain how individuals infer stable personality traits from observed behaviors. It suggests that people attribute actions to underlying dispositions rather than external circumstances, particularly when the behavior appears intentional and socially significant.Voluntary Behavior and Dispositional AttributionAccording to this theory, individuals are more likely to attribute behavior to personal traits when it appears...
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Theory of Attribution II: Kelley's Covariation Theory01:29

Theory of Attribution II: Kelley's Covariation Theory

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Attribution theory plays a crucial role in social psychology, helping to explain how individuals interpret the causes of behavior. One prominent model within this field is Harold Kelley's covariation theory, which provides a systematic approach to determining whether internal traits or external circumstances drive a person's actions. The model posits that individuals rely on three key types of information—consensus, consistency, and distinctiveness—to make these judgments.Consensus:...
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At the molecular level, visual signals trigger transformations in photopigment molecules, resulting in changes in the photoreceptor cell's membrane potential. The photon's energy level is denoted by its wavelength, with each specific wavelength of visible light associated with a distinct color. The spectral range of visible light, classified as electromagnetic radiation, spans from 380 to 720 nm. Electromagnetic radiation wavelengths exceeding 720 nm fall under the infrared category,...
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An evolution of image source camera attribution approaches.

Mehdi Jahanirad1, Ainuddin Wahid Abdul Wahab1, Nor Badrul Anuar1

  • 1Department of Computer System and Technology, Faculty of Computer Science and Information Technology, University of Malaya, 50603 Kuala Lumpur, Malaysia.

Forensic Science International
|April 10, 2016
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Summary
This summary is machine-generated.

This study reviews image source camera attribution techniques, focusing on image processing and data mining. It classifies existing and emerging methods to improve accuracy and efficiency in digital image forensics.

Keywords:
Camera attributionImage featureImage forensicsImage miningImage processing

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Area of Science:

  • Digital Image Forensics
  • Computer Vision
  • Data Mining

Background:

  • Camera attribution is crucial for digital image forensics, identifying image origin.
  • Real-world challenges include vast data, uncontrolled conditions, and post-processing.
  • Legal acceptance requires unbiased, reliable, and nondestructive attribution techniques.

Purpose of the Study:

  • To investigate the evolutionary trends of image source camera attribution.
  • To review image processing and data mining applications in this field.
  • To classify existing and novel attribution approaches for better understanding.

Main Methods:

  • Structured image mining process to extract intrinsic image artifacts.
  • Analysis of image processing pipelines and feature classification.
  • Review and categorization of source camera attribution techniques based on parameters like color processing, artifacts, and extraction methods.

Main Results:

  • Classification of existing approaches based on color processing, hardware/software artifacts.
  • Categorization of recent, less-explored methods into optical aberrations, sensor fingerprints, processing statistics, and regularities.
  • Identification of challenging problems and proposed strategies for optimization.

Conclusions:

  • The paper provides a comprehensive overview and classification of source camera attribution methods.
  • It highlights recent advancements and categorizes them for further research.
  • The study aims to guide future research towards more accurate, robust, and efficient attribution techniques.