Over the last couple of days, I have been pondering the combination of an old concept with a new concept, in which the PropCam might be an ideal solution to a problem. I am sure you have done a fair amount of experimenting with this cam and I am wondering if you will tell me what the absolute minimum distance is from lens to object and still achieve a clear focus.
With the lens screwed almost all the way out, it can be in contact with the subject to get a focused image. Here's an image that was made with the lens about 1/8" from a 50-dollar bill, focused on Gen. Grant's eye:
I don't know if you caught my other thread, but I decided to hack a webcam instead, after being inspired by Grant's eye. Here are two examples of the results.
I did not have a Grant handy, so Hamilton had to sit in for the photo session.
The forumla would be more like AvgPix / (Exp * Gain[g]), where g is the programmed gain value, and Gain is a lookup array containing the actual gains from the datasheet.
Comments
Over the last couple of days, I have been pondering the combination of an old concept with a new concept, in which the PropCam might be an ideal solution to a problem. I am sure you have done a fair amount of experimenting with this cam and I am wondering if you will tell me what the absolute minimum distance is from lens to object and still achieve a clear focus.
Bruce
-Phil
That is pretty impressive.
Thanks for taking the time to check it out for me and providing an example.
Bruce
I don't know if you caught my other thread, but I decided to hack a webcam instead, after being inspired by Grant's eye. Here are two examples of the results.
I did not have a Grant handy, so Hamilton had to sit in for the photo session.
How to estimate the brightness of a room?
Is there a simple formula like
Brightness = Avg_pix * (Exp/Gain)
The forumla would be more like AvgPix / (Exp * Gain[g]), where g is the programmed gain value, and Gain is a lookup array containing the actual gains from the datasheet.
-Phil