Hi,
Please check weather you followed below steps
- Create object and define properties for the object
- Create transaction for the object,select the properties that you want to update to back end
- Create a screen set for the transaction
- Define an action to navigate to the transaction screen set
- Define an action button in the screen for navigation
If you are defining the field that captures the image in detail screen it is only for display purpose , try to go for transaction screens.
Thanks & Regards,
Sravanthi Polu