Feature extraction processing time in human visual system

TOSHIAKI IMADA; EIJI YODOGAWA

doi:10.4992/psycholres1954.27.11

TOSHIAKI IMADA, EIJI YODOGAWA

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Keywords: character recognition, feature extraction, processing time, visual masking, perception

JOURNAL FREE ACCESS

1985 Volume 27 Issue 1 Pages 11-20

DOI https://doi.org/10.4992/psycholres1954.27.11

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Published: June 20, 1985 Received: January 09, 1984 Available on J-STAGE: February 24, 2009 Accepted: November 10, 1984 Advance online publication: - Revised: -
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Date of correction: February 24, 2009 Reason for correction: - Correction: ABSTRACT Details: Wrong : Two backward masking experiments were carried out. In Experiment 1, the test pattern was one or two vertical lines and the mask stimulus was a large rectangle flash pattern or four small rectangle flash pattern. Three subjects reported how many lines were presented. In Experiment 2, three symbols (English alphabet letters or Chinese ideographs) were successively presented on the same position of the CRT display. Four subjects reported the name of the first symbol. Experiment 1 revealed that the response latency of feature extraction stage in the human visual system was about 50 ms. Experiment 2 showed that in the feature extraction stage the time required for processing a symbol was about 60-70 ms. The results indicate that feature extraction processing is parallel, that is, it extracts two or more line segments in the same time, and that feature extraction processing for a symbol is completed about 80-100 ms after the onset of the symbol presentation to the retina.
Right : Two backward masking experiments were carried out. In Experiment 1, the test pattern was one or two vertical lines and the mask stimulus was a large rectangle flash pattern or four small rectangle flash pattern. Three subjects reported how many lines were presented. In Experiment 2, three symbols (English alphabet letters or Chinese ideographs) were successively presented on the same position of the CRT display. Four subjects reported the name of the first symbol. Experiment I revealed that the response latency of feature extraction stage in the human visual system was about 50 ms. Experiment 2 showed that in the feature extraction stage the time required for processing a symbol was about 60-70 ms. The results indicate that feature extraction processing is parallel, that is, it extracts two or more line segments in the same time, and that feature extraction processing for a symbol is completed about 80-100 ms after the onset of the symbol presentation to the retina.

Date of correction: February 24, 2009 Reason for correction: - Correction: AFFILIATION Details: [in Japanese]

Date of correction: February 24, 2009 Reason for correction: - Correction: PDF FILE Details: -

Date of correction: February 24, 2009 Reason for correction: - Correction: ABSTRACT Details: Wrong : Two backward masking experiments were carried out. In Experiment 1, the test pattern was one or two vertical lines and the mask stimulus was a large rectangle flash pattern or four small rectangle flash pattern. Three subjects reported how many lines were presented. In Experiment 2, three symbols (English alphabet letters or Chinese ideographs) were successively presented on the same position of the CRT display. Four subjects reported the name of the first symbol. Experiment I revealed that the response latency of feature extraction stage in the human visual system was about 50 ms. Experiment 2 showed that in the feature extraction stage the time required for processing a symbol was about 60-70 ms. The results indicate that feature extraction processing is parallel, that is, it extracts two or more line segments in the same time, and that feature extraction processing for a symbol is completed about 80-100 ms after the onset of the symbol presentation to the retina.
Right : Two backward masking experiments were carried out. In Experiment 1, the test pattern was one or two vertical lines and the mask stimulus was a large rectangle flash pattern or four small rectangle flash pattern. Three subjects reported how many lines were presented. In Experiment 2, three symbols (English alphabet letters or Chinese ideographs) were successively presented on the same position of the CRT display. Four subjects reported the name of the first symbol. Experiment I revealed that the response latency of feature extraction stage in the human visual system was about 50 ms. Experiment 2 showed that in the feature extraction stage the time required for processing a symbol was about 60-70ms. The results indicate that feature extraction processing is parallel, that is, it extracts two or more line segments in the same time, and that feature extraction processing for a symbol is completed about 80-100 ms after the onset of the symbol presentation to the retina.

Abstract

Two backward masking experiments were carried out. In Experiment 1, the test pattern was one or two vertical lines and the mask stimulus was a large rectangle flash pattern or four small rectangle flash pattern. Three subjects reported how many lines were presented. In Experiment 2, three symbols (English alphabet letters or Chinese ideographs) were successively presented on the same position of the CRT display. Four subjects reported the name of the first symbol. Experiment I revealed that the response latency of feature extraction stage in the human visual system was about 50 ms. Experiment 2 showed that in the feature extraction stage the time required for processing a symbol was about 60-70ms. The results indicate that feature extraction processing is parallel, that is, it extracts two or more line segments in the same time, and that feature extraction processing for a symbol is completed about 80-100 ms after the onset of the symbol presentation to the retina.

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