javascript - JsQRCode reader not working properly -

i using jsqrcode js library decode qr codes. found works fine if take pictures of qr code close.

if take picture bit farther not able decode code.

note: code-decoding library used within sencha touch 2 app. picture taken using ext.device.camera api gives access phone camera.

has had similar problems? possible solution or alternative way reach goal (taking picture + qr decoding)?

any suggestion/comment appreciated! thank much!

here code i'm running:

ext.device.camera.capture({ success: function(fileuri) {         // reassigning test purposes         //fileuri = './resources/images/qrtemp.png';          console.log('camera success');     var imageview = ext.getcmp('cameraimg');     imageview.setsrc(fileuri);          qrcode.decode(fileuri); }, failure: function() {     console.log('camera failure'); }, quality: 100, source: 'camera'  }, /*scope*/ this, /*destination*/ 'file', /*encoding*/ 'png');  ...  qrcode.callback = function(data){ window.alert('qrcode callback: '+ data); }; 

update: found out problem camera api sencha touch returning small image (although supposed return bigger one), code reader lib not able decode! has faced sencha touch problem?