Testing device and method, and non-transitory computer-readable recording medium

A testing device, comprising:

• a photographing unit configured to photograph a needle tip of a probe needle provided in a probe card used for testing of a test object;
• a segmenting unit configured to recognize a needle tip region and a needle region around the needle tip region in a validation image photographed by the photographing unit, and generate a segmented image in which the needle tip region and the needle region around the needle tip region are segmented, by inputting the validation image to a segmentation model that is trained using training data including training images each obtained by photographing the needle tip of the probe needle, the training images each being given a scope of the probe needle and a scope of the needle tip;
• a position determining unit configured to determine a position of the needle tip based on a positional relationship between the needle region and the needle tip region;
• and
• a position adjusting unit configured to adjust a relative position between the test object and the needle tip of the probe needle based on the position of the needle tip determined by the position determining unit.