Pictures don't support being anchored to the map scroll, you will have to use Javascript to implement this kind of functionality.
If you absolutely must avoid Plugins, then you can do the following event;
In this example, the picture is anchored to the top-left of the map 128 pixels from the left and 256 pixels from the top.
This will be 1 frame behind in movement, so it's not as good as what a Plugin will get you, but it works.
Screenshots (doesn't exactly show it in motion, but whatever);
Album:
http://imgur.com/a/AWpdA
Javascript is used to offset the picture relative to the player's scroll position:
JavaScript:
$gamePlayer._realX * 48
$gamePlayer._realY * 48
48 is used as it's the size of a tile in default RPG Maker MV. A healthier thing to do is to use the $gameMap.tileWidth and $gameMap.tileHeight, but whatever floats your boat in this case (it makes no difference at all if you're sticking with 48px tiles).