Suggestion of a class that returns a PIXI Sprite object with a simple configuration.

pixi-sprite-generator.js

/*	CREATE PIXI SPRITE CLASS  
 *	In order to clean the code create a class that returns the sprite
 *	for the background image.
 *	Most common cases for sprites are position, scale, width, height,
 *	anchor and alpha;
 *	@param {string} the image url
 *	@param {object} configurations of the sprite
 */
	var createPixiSprite = function(imgURL, config){

		var pixiSprite = PIXI.Sprite.fromImage(imgURL);

		for( var key in config ) {
			
			// in the case of x and y properties, remove the final letter
			// and set the properties in the PIXI way property.x
			if( key.slice(-1) === "X" || key.slice(-1) === "Y") {
				
				// assign the value to the property
				pixiSprite[key.slice(0,-1)][key.slice(-1).toLowerCase()] = config[key];

			} else {
				// if no letter is passed, means a property that has only one option
				// or a general value for the x and y options.
				// for scale, anchor and position use the same value for both
				switch (key) {

					case "scale":
						pixiSprite.scale.x = config[key];
						pixiSprite.scale.y = config[key];
						break;

					case "position":
						pixiSprite.position.x = config[key];
						pixiSprite.position.y = config[key];
						break;

					case "anchor":
						pixiSprite.anchor.x = config[key];
						pixiSprite.anchor.y = config[key];
						break;

					default:
						pixiSprite[key] = config[key];

				}// switch end

			}// conditional end

		}// loop end

		return pixiSprite;

	};
	
// usage
var image = new createPixiSprite('pngs/landscape.jpg', {
	scale: 0.45, anchor: 0.5, positionX : 102.5, positionY : 127.5, alpha: 0
});