uploading images to web services

Hi all, I am doing an app where a user can upload up to 3 photos in a particular web service. I am looking for guidance on best practice of how to handle this. Originally, I was going to store images as BLOBs in my database, but instead, I think it may be better to store the urls in the database? I am seeking advice on how to post the images to the web service and how to store them? What I have so far is the following:

//var Photos_array=[];
Upload_pic.addEventListener('click', function (e){
        Upload_pic.setImage('/images/uploadPhoto2.png');
        Titanium.Media.openPhotoGallery({
            success: function(e){
                ImageView = Ti.UI.createImageView({
                    image:e.media,
                    width:'200dp',
                    height: '200dp'
                });
            },
            error: function(e){
                alert("Error accessing photos");
            },
            cancel: function(e){
                alert("Gallery was cancelled");
            },
            alowEditing:true,
            mediaType:[Titanium.Media.MEDIA_TYPE_PHOTO]
        });
        console.log(typeof ImageView.image);
        //Photos_array.push(ImageView.image);
    });