Take Photo widget: The quality of the picture is a little low.

The quality of the picture is a little low. I would like to increase the image quality to be able to have a picture of "readable" words and numbers...

Is there a way to increase the quality of the picture uploaded to the form ?

Unfortunately it is not possible to change the uploaded image resolution of take photo widget. I would suggest you to please add regular file upload field in form. When the form is accessed using a mobile device, user will have option to select existing image or use camera to take photo and upload it. The following guide should help you how to add file upload field in form: https://www.jotform.com/help/332-How-to-Create-File-Upload-Forms 

Do try it out and get back to us if you have any questions.