Hi deshipu&kwagyemn thanks your help! i think it is hard to keep holes at the fixed location ,the device must be a handheld device, but the relative location of all the should be fixed. i am not going to use ir-led ,and I want take grayscale image, i wiil provide enough brightness light for it . so ...

Hi Guys, i want to make an instrument which can detect two row arrays holes. it may like below picture: hole detection.png attachment details: 1.the captured FOV maybe need to be limited within red block. 2.black hole means :binary 1 3.white hole( actually ,no hole) means : binary 0 4.the diameter o...