In specified intervals, Integromat checks whether there is a new image in specified Google Drive folder. If so, the image is downloaded, the text from the image is detected by Google Cloud Vision and the new pin is created in Pinterest. The new pin contains the image and the description is made from the text detected by Google Cloud Vision. After that, the original file is moved to another folder in Google Drive.
This is a predefined template that will make the creation of your scenario much easier. Of course, you can always expand and customize the scenario to meet your own individual needs.