Accession Number : ADA621979


Title :   The Effect of Resolution on Detecting Visually Salient Preattentive Features


Descriptive Note : Final rept.


Corporate Author : ARMY RESEARCH LAB ADELPHI MD COMPUTATIONAL AND INFORMATION SCIENCES DIRECTORATE


Personal Author(s) : Raglin, Adrienne ; Chan, Christine


Full Text : http://www.dtic.mil/get-tr-doc/pdf?AD=ADA621979


Report Date : Jun 2015


Pagination or Media Count : 16


Abstract : Determining the factors that affect saliency within an image is valuable to a wide variety of real-world applications, such as object detection and identification. In this report, we discuss an initial investigation on the impact of 1 factor in particular, image resolution. Understanding the relationship between image resolution and saliency may lead to new image processing techniques that are able to factor in an attempt to improve the extraction of valuable information from a scene. A total of 12 scenes, 10 natural and 2 artificial, were used to create the image set used in this study, which consisted of images of each scene at 100%, 75%, 50%, 25%, and 18.75% of the original image resolution. The Harrison and Etienne-Cummings ideal observer model (IOM) was then applied to the image set so that salient areas could be highlighted. The IOM was used to identify the 20 most salient regions within each image. Then for each scene, the performance of the IOM was compared across all resolutions. We were particularly interested in whether the same salient regions persisted across all resolutions. The results of the study show that resolution may affect the selection of salient areas within the IOM.


Descriptors :   *ATTENTION , *IMAGE PROCESSING , *VISUAL PERCEPTION , COMPUTERIZED SIMULATION , DYNAMICS , ENTROPY , FEATURE EXTRACTION , INFORMATION PROCESSING , MAPPING , MATHEMATICAL MODELS , NETWORK TOPOLOGY , PERFORMANCE(ENGINEERING) , RESOLUTION


Subject Categories : Anatomy and Physiology
      Cybernetics


Distribution Statement : APPROVED FOR PUBLIC RELEASE