Nail region detection method, program, storage medium, and nail region detection device

摘要

Disclosed is a nail region detection device including: color camera; image data storage part; color specification conversion plotting part for converting captured image data from the RGB color specification system to the HLS color specification system; threshold value setting part for setting and varying a threshold value along the X axis with respect to a first plotting region; second plotting part for replotting in a two-dimensional planar second graph, plotting data items which are equal to or greater than the threshold value and detecting the physical quantity or its ratio in a second plotting region; repeat control part for repeating the processing for replotting the data items; nail determination part for determining, as a nail region, a second plotting region in which the gradient of the amount of variation in the physical quantity or its ratio is equal to or less than a predetermined value.

主权项

1. A nail region detection method comprising at least:
repeating, several times, a step of mapping a first plotting region, which is obtained by plotting and converting the image data of a hand image captured by a colour camera in a three-dimensional colour spatial first graph, in a two-dimensional planar second plotting region, while varying a threshold value in line with a value along one axis of the three-dimensional colour space; detecting at least one physical quantity or its ratio in the two-dimensional planar second plotting region at each of the mapping steps; and determining, as a nail region, the second plotting region, in which the gradient of the amount of variation, when the physical quantity or its ratio is varied at each of the mapping steps, is less than a predetermined value.