PubMed · 8680327
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D I Johnson. Spreadsheet concepts: graph terminology.. https://pubmed.ncbi.nlm.nih.gov/8680327/
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To fully take advantage of the widespread use of digital imaging systems and to update and eliminate redundant steps involved in medical radiographic publication, we present our experience of processing Digital Imaging and Communications in Medicine (DICOM)-3 digital images from the point of acquisition to the point of publisher-ready radiographic images without intervening hardcopies.
In the initial stages of visual processing in primates, more or less separated ON and OFF pathways have been shown to exist. There is ample evidence, that this separation includes the initial stages of motion processing. In the present study, experiments were conducted to investigate whether this ON versus OFF distinction persists into the integration stage of local motion information. We constructed stimuli that consisted of clusters of checks with equal contrast polarity, which could be varied in size, and compared them to stimuli with a random polarity distribution. We found that the ON versus OFF distinction remains partly intact, while interactions between the two systems are also apparent. These interactions prove to be highly correlated with the spatial structure of the stimulus. We propose a mechanism of contrast-sign specific integration of local motion signals, after which these separate ON and OFF pools engage in mutually inhibitory interactions.