# How to trim a sprite?

I have a spritesheet:

var spriteSheet = new createjs.SpriteSheet({
// ...
frames: { width:520, height:600, regX: 260, regY:300 }
// ...
});


I am computing it's physics body as follows:

var bounds = entity.sprite.getTransformedBounds();
halfWidth = bounds.width / 2,
halfHeight = bounds.height / 2,
// ... Create the physics body


The result:

The ground is a solid body, and the sprite is dynamic. I would like the sprite's feet to touch the actual ground and get rid of the whitespace around the sprite (above, below and sides).

The problem is that there is whitespace in the spritesheet. Each frame is 520x600 in the sheet. I have lots of frames and I would rather not go through each of them to figure out each one's exact dimensions.

Is this possible? Also I'm new to game dev, it's very fun. Is this what applications like TexturePacker are for?