Record resolution/Output resolutionViews : 2519 Replies : 4 Likes : 0 2017-12-02 23:06 #1
1. It is not clear to me if changing the output resolution changes the recording resolution?
Setting the output resolution to 4096 x 2160 (Logitech Brio 4K webcam) fills the screen so I cannot do anything else while the recording is being done. Reducing the output resolution to 640 x 360 reduces the size of the recording screen making other windows accessible. But has it also reduced the resolution of the recording?
2. I would like to capture high resolution still shots from the webcam. Is this possible with this software? The Screen shot tab let me select the video screen at the lower output resolution but I have not yet found the snapshot I took.
This is a lot more promising than all the other so called high resolution software I have found so far.
Post Script: Use an extended screen. So obvious once you know!2017-12-03 17:09 #2
And now with Paint 3D I can count and mark off the pixels so I can establish the error in the measurements I am taking off my screen shots. Job done, problem solved. I can now go off and test each output resolution and answer my own question. I will let you know when I have the answer. ?2017-12-04 04:37 #3
I have taken a series of screen shots at different resolutions, zoom settings and magnifications.
I am not sure of the maths explanation, but here are my results for you to review and comment on.
This 5 is 198 pixels high.
This 5 is 19 pixels high.
Method: Gimp was used to measure the pixels directly.
Conclusion: The output resolution is important because it sets the resolution of the recorded picture.
In my case I will be measuring fibres 20µ wide and will need to achieve a magnification that will give me at least 20 pixels for these fibres, giving a 5% measurement error. This is quite acceptable considering the low investment (<$1000) it has taken to achieve this. To get a lower error a considerably larger amount of investment is needed (about $120000 for commercial measuring equipment).