无法将图像保存到laravel中的公共目录

Hi I'm getting this error message while trying to save an image using Intervention/image .

{
    "error": {
        "type": "Intervention\\Image\\Exception\\NotWritableException",
        "message": "Can't write image data to path (/home/sourav/Public/master/v1.1.01/public/images/collections/Java/backgrdImageUrl.jpg)",
        "file": "/home/sourav/Public/master/v1.1.01/vendor/intervention/image/src/Intervention/Image/Image.php",
        "line": 143
    }
}

Here is the code within my function setBackgroundImageUrl($image)

$img = Image::make($image);
$img->save(public_path() . '/images/collections/' . $this->getCollectionTitle() . '/backgrdImageUrl.jpg');

It looks like a permissions issue but I tried chmod -R 777 /images/collections at it still throws the same error message.