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Fig. 3

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Steps of image preprocessing. (a) The photometric image. (b) Converts the image to grayscale. (c) Binarizes the image, and (d) Obtains the contours of each galaxy in the image and performs elliptical fitting on these galaxies. (e) The target galaxy after covering the interfering galaxies. (f) The minimum circumcircle of the target galaxy.

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