Hola, ya que especificas que el formato es JPEG. puedes cargar la foto a un TJPEGImage
Código Delphi
[-]
uses
.. JPEG;
procedure TForm1.VerFoto(Foto: TArray< System.Byte >; Image: TImage);
var
JPEGImage: TJPEGImage;
AStringStream: TStringStream;
begin
AStringStream := TStringStream.Create(StringOf(Foto));
JPEGImage := TJPEGImage.Create;
try
AStringStream.Position := 0;
JPEGImage.LoadFromStream(AStringStream);
Image.Picture.Assign(JPEGImage);
finally
JPEGImage.Free;
AStringStream.Free;
end;
end;