Diversity visa program (Green Card visa lottery program) participants have to upload a digital color photo file of them along with their E-DV entry form. This photo file should meet the current DV Instructions. To get a perfect photo file, ask one professional photographer or reputed studio. There are many guide lines applies to make a digital photo file for the US visa. Tell the studio people to provide one American visa photo in CD, USB flash drive, memory card or ask them to send it to your email. In this way you can get the photo file easily in to your PC, laptop or Tablet and can use it to apply for the draw.
Transferring through Viber, Whatsapp and Snapchat like programs are not recommended.
These programs used to optimize the images for easy transferring. So you may not get the required quality to meet the draw requirements.
Some people used to apply with the same old photo files for saving money or being lazy to make new photo.
New rules of DV-2018 say, photo files that were used in the previous diversity programs will be rejected.
So capture a new photo for the DV-2019 and it should be less than 6 months old.
Married person? Your spouse photo file too should be uploaded along with her details in the application form.
Applicants with eligible children must upload each of their separate photo files along with their names and details in their birth order.
The rules clearly indicate that all photos must be recently taken one. (Within 6 months on the date of application.)
Don't submit entry without image (any of the eligible members of your family or your spouse). The entry will not be accepted by the system and it will be shown to you with the error.
Group photos, black and white, monochrome, or grayscale ones will not be accepted with the application form.
Get photograph with digital camera, Smartphone or Tablet. Also you can scan a photo print according to the instructions.
Photos source: Dept. of State U.S