[Ir...] Posted December 7, 2021 Share Posted December 7, 2021 I have a question regarding the camera that we have available. We have a 18 MP camera and we are interested in measuring crack widths of 0.05 mm. Is the following reasoning correct? o 5184 * 3456 ≈ 18.0 MP o Measure crack width of 0.05 mm o Width camera image : 5184 * 0.05 = 259.2 mm o Height camera image: 3456 * 0.05 = 172.8 mm Is a 18 MP camera of good quality for measurements from 0.05 mm accuracy? Looking forward to your reply! Link to comment Share on other sites More sharing options...
[Br...] Posted March 30, 2022 Share Posted March 30, 2022 Sounds like you're talking about measuring system displacement resolution or accuracy. The 3D fixed base sensors are accurate to 1/100th of a pixel in plane and 1/30th of a pixel out of plane. Using the more conservative 1/30th value, the equation to use is: FOV [length] / Camera Resolution [px] * 0.033[px] = displacement resolution [length] You can also substitute the calibration deviation for the 0.033 px to get your actual system's accuracy Link to comment Share on other sites More sharing options...
[Iv...] Posted April 11, 2022 Share Posted April 11, 2022 Dear Iris, maybe this FAQ article gives you little bit more input. https://connect.gom.com/x/pa3VAg Greetings, Ivan Link to comment Share on other sites More sharing options...
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