I would like to know if opencv can capture text as small as a few pixels

1

how to size picture opencv work ?

2

welcome.

your question is unclear. you will need to elaborate. please post source code and pictures, if you have that.

3

What is the smallest image size that can be captured by opencv?

4

1x1 or 0x0 if you want to be mathematical about it.

why don’t you just tell us what you want to capture, and how you want to capture?