Leakage oil detection device and leakage oil detection method

A leakage oil detection device configured to detect leakage oil in an oil filled apparatus, the leakage oil detection device comprising:

• a light source configured to irradiate the oil filled apparatus with light;
• an imaging device configured to capture an image of the oil filled apparatus;
• a control device configured to control operations of the light source and the imaging device;
• a storage device configured to store a captured image;
• an image processing device configured to process the stored image;
• and
• a display device configured to display a processing result, wherein
• the light source and the imaging device are arranged in a manner of being capable of capturing specular reflection light from a surface of the oil filled apparatus as a target object,
• the image processing device
• recognizes a brightest portion and a dark portion adjacent to the brightest portion on the captured image as leakage oil adhesion portions when a three-layer structure of luminance having bright portions having different luminances and a dark portion is observed in the image, and
• extracts only a leakage oil site by machine learning method with respect to the observed three-layer structure of luminance, and
• the display device displays by adding a marker to an original image or the same image obtained without irradiation of the light source.