Set camera ios phonegap - ios

Question

I'm having a couple of issues I tell them. I am taking a picture with the plugin Camera with phonegap and that suits me, what I do with that image is about putting another picture above I'm doing it through canvas and the problem is this left images to make it look. Zoom or something applied.
Original image
https://scontent-mia.xx.fbcdn.net/hphotos-xpf1/v/t1.0-9/10987455_403839709795958_6331116352644016645_n.jpg?oh=df8fc2cef2c1255a6babec94b3a2056d&oe=557E3520
Canvas image
https://scontent-mia.xx.fbcdn.net/hphotos-xpf1/v/t1.0-9/11064814_403839689795960_2255378534429169909_n.jpg?oh=9c0ebab7c6e9911cc28695fa80cc3033&oe=5581D16B
Also, when I take photos I can not take it whole, something I do not understand that there will be cutting the image.
Here's the setup method camera and canvas.
$scope.guardarFoto = function(){
var c = document.getElementById("myCanvas");
var ctx = c.getContext("2d");
var img = document.getElementById("img_foto");
var img2 = document.getElementById("img_foto2");
ctx.drawImage(img,0,0);
ctx.drawImage(img2,0,0);
window.canvas2ImagePlugin.saveImageDataToLibrary(
function(msg){
console.log(msg);
},
function(err){
console.log(err);
},
document.getElementById('myCanvas')
);
}
Camera.DestinationType = {
DATA_URL : 0, // Return image as base64-encoded string
FILE_URI : 1, // Return image file URI
NATIVE_URI : 2 // Return image native URI (e.g., assets-library:// on iOS or content:// on Android)
};
Camera.PictureSourceType = {
PHOTOLIBRARY : 0,
CAMERA : 1,
SAVEDPHOTOALBUM : 2
};
Camera.EncodingType = {
JPEG : 0, // Return JPEG encoded image
PNG : 1 // Return PNG encoded image
};
Camera.MediaType = {
PICTURE: 0, // allow selection of still pictures only. DEFAULT. Will return format specified via DestinationType
VIDEO: 1, // allow selection of video only, WILL ALWAYS RETURN FILE_URI
ALLMEDIA : 2
};
Camera.Direction = {
BACK : 0, // Use the back-facing camera
FRONT : 1 // Use the front-facing camera
};
$scope.getPhoto = function() {
var options = {
quality: 100,
destinationType: Camera.DestinationType.FILE_URI,
sourceType: Camera.PictureSourceType.CAMERA,
allowEdit: true,
encodingType: Camera.EncodingType.JPEG,
targetWidth: 500,
targetHeight: 500,
popoverOptions: CameraPopoverOptions,
saveToPhotoAlbum: true,
correctOrientation: true
};
Camera.getPicture(options).then(function(imageURI) {
console.log(imageURI);
$scope.lastPhoto = imageURI;
}, function(err) {
// error
});
};