Board inspection device and board inspection method

A board inspection method of inspecting an adhesive applied on a board, the board inspection method comprising:

• an imaging process of taking an image of an area on the board where the adhesive is applied;
• a center portion specification process of specifying, by a first procedure, a center portion area of the adhesive in the image obtained by the imaging process;
• a foot portion specification process of specifying, by a second procedure, a foot portion area of the adhesive around the center portion area in the image;
• an entirety specification process of specifying an entire area of the adhesive based on the center portion area and the foot portion area;
• and
• a determination process of determining, based on the entire area of the adhesive, whether a quality of the adhesive is good or poor, wherein
• the board has a green resist area,
• the adhesive has a red color and is applied on the resist area, and
• the foot portion specification process extracts, when specifying the foot portion area, an area of lower saturation than a predetermined saturation reference value from a saturation image based on the image.