UploadPicture() and UploadUserPhoto() Limit
You could upload the terminal Advertisement Photo and User Photo via BioBridge SDK directly. To ensure your picture successfully uploaded to the terminal, please follow below picture spefication
a. UploadPicture()
1. Only JPG picture format is supported.
2. Size must be 320px X 210px and less than 30kb
b. UploadUserPhoto()
1. Only JPG picture format is supported.
2. Size less than 30kb

Once you have successfully uploaded the picture, you could download it back with DownloadPicture() or DownloadUserPhoto() respectively.