[[movorack]]

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;