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Analysis of Spatial Resolution Characteristics for DMC/UlatraCamXp/ADS80 Digital Aerial Image Based on Visual Method
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 Title & Authors
Analysis of Spatial Resolution Characteristics for DMC/UlatraCamXp/ADS80 Digital Aerial Image Based on Visual Method
Lee, Tae Yun; Lee, Jae One;
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Digital aerial images have been commonly used in a large scale map production owing to their excellent geometry, and high spatial and radiometric resolution in recent years. However, a quality verification process for acquired images should be preceded in order to secure the high precision and reliability of produced results. Several experimental studies to verify digital imaging systems have been vigorously researched by constructing permanent test field in abroad. On the other hand, it is urgently necessary to suggest a practical scheme for an image quality verification, because this related study and experiment are still in its early stage at home. Hence, this study aims to present an easy method to measure the spatial resolution of the image in a visual way using a portable Siemens star. The images used in the study were obtained with three different cameras, two frame array sensors of DMC, UltraCamXp and a linear array sensor of ADS80. The Siemens star target appeared in every image is extracted and then the spatial resolution of image is compared with theoretical GSD(Ground Sample Distance) by a visual method. In addition, the change of spatial resolution depending on the location of the Siemens star from image center and flight direction and cross-flight direction is also compared and analyzed. As study results, while the theoretical GSDs of images taken with each camera are about 6~9cm, the visual resolutions are 1.2~1.3 times as great as the theoretical ones.
Digital Airborne Camera;Spatial Resolution;Visual Resolution;Siemens Star;
 Cited by
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