Method and system for distinguishing oil level of transformer in power distribution room and medium

The invention discloses a power distribution room transformer oil level distinguishing method and system and a medium, and the method comprises the steps: obtaining a transformer oil level image, and carrying out the image preprocessing; positioning a pointer of the oil meter of the transformer to obtain an axis position and a pointer position of the oil level meter; identifying a starting point and an ending point of an oil level gauge to obtain an oil level main reading; and if the judgment result is abnormal, outputting alarm information. According to the invention, homomorphic filtering and median filtering are carried out on the oil level image to eliminate the influence of illumination and noise in the image acquisition process, so that the adaptability to different illumination is improved; then, the axis position of the oil level image is subjected to Hough transform to detect a pointer, so that global edge points are prevented from being searched, the calculation amount and the program running time a