| 摘要 |
A method for detecting a linear image in a planar picture is provided whereby the positions of a linear image can be determined by devising suitable processing of image data, even if a linear image traced by a moving object, such as space debris, a meteor, or the like, does not appear clearly on a picture. Image data processing, consisting of division processing (S 2 ) for dividing image data of a planar picture captured by an imaging element into a plurality of mutually parallel columnar image data and representative value selection processing (S 3 ) for taking the median value determined for each of the columnar image data as a representative value for the corresponding columnar image data, is performed in every direction of said planar picture, whereupon analysis processing consisting of significant value detection processing (S 6 ) for detecting whether or not said representative value of each of said columnar image data is a significant value, and linear image position identification processing (S 7 ) for identifying the linear position of columnar image data having a representative value indicating a significant value as the position of a linear image resulting from the passage of the moving object or the like, is performed.
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