US 12,216,064 B2
Inspection device
Tomoya Fujimoto, Nagoya (JP); Takahiro Kobayashi, Chiryu (JP); and Yuki Inaura, Chiryu (JP)
Assigned to FUJI CORPORATION, Chiryu (JP)
Appl. No. 17/629,757
Filed by FUJI CORPORATION, Chiryu (JP)
PCT Filed Jul. 26, 2019, PCT No. PCT/JP2019/029471
§ 371(c)(1), (2) Date Jan. 24, 2022,
PCT Pub. No. WO2021/019610, PCT Pub. Date Feb. 4, 2021.
Prior Publication US 2022/0252524 A1, Aug. 11, 2022
Int. Cl. G01N 21/95 (2006.01); G01N 21/88 (2006.01); H05K 13/08 (2006.01)
CPC G01N 21/95 (2013.01) [H05K 13/08 (2013.01); G01N 2021/8845 (2013.01); G01N 2021/8887 (2013.01)] 3 Claims
OG exemplary drawing
 
1. An inspection device for executing a mounting inspection of a component using an inspection image of a board on which the component is mounted, comprising:
an imaging device configured to obtain three monochromatic images of the board in red, green, and blue; and
an image processing device configured to
analyze each of the monochromatic images and count occurrences of brightness values 0 to 255;
determine a board color R, G, B based on a highest count of the occurrences of the brightness values of the three monochromatic images,
determine a complementary color R′, G′, B′ of the board based on a highest brightness value among the board color R, G, B, and a lowest brightness value among the board color R, G, B, and,
determine a color component as having a largest brightness value in the complementary color R′, G′, B′, and
select a monochromatic image of the three monochromatic images corresponding to the color component as the inspection image.