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We have developed image measuring software to carry out fully automated surface photometry for wide-field galaxy surveys. This paper describes the details of the architecture of the software. We also present a detailed description of its performance which is tested with surface photometry for rather bright galaxies in the 10^deg^ x 10^deg^ field centered on the Coma cluster using B-band Schmidt plates. It is shown that the software works nearly as good as galaxy-by-galaxy surface photometry and produce varieties of photometric parameters, including rudimentary galaxy morphologies, for a wide magnitude range with errors close to the limiting accuracy that is expected for photographic photometry based on our Schmidt plates.
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Doi et al. (1995) studied this question.
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