what the minimum size for the uSD card to download Yocto Image with OpenCV ?
The image you are talking about is the EGLIBC. I have used SD of 4GB and 8GB. In order to use this image you have to follow this instructions: Making a bootable micro SD Card with Windows* | Intel® Developer Zone
In there you will see the requirements for the SD:
A micro-SD card. The card must be at least 4GB and can be up to 32GB
Retrieving data ...