In my application for the OpenMV, I’d like to know the distance between the camera and an object. Where I am tracking a color blob, may I assume the Methods “blob.pixels” or “blob.area” will tell me the relative distance because the number of pixels increases as I get closer? What about the case of not tracking a blob? I could use ultrasonic or other acoustic methods since there would be no visual interaction. My question is about the Sharp optical ranging sensors. I have not yet experimented to see if the IR they emit would negatively impact operation of the OpenMV. Do you have any experience with the Sharp sensors? I will read their datesheet to learn the characteristic of their output and also try placing one in the field of view for the OpenMV and observe if I can detect any difference in the images captured.
What are your thoughts on this topic?