Image Scaling for retina

loading the image from the file

  UIImage *image1 = [UIImage imageWithData:entity.noteImage];

    CGSize newSize = CGSizeMake(315.0 ,95.0);
    UIGraphicsBeginImageContextWithOptions(newSize, NO, 0.0);

    [image1 drawInRect:CGRectMake(0,0,newSize.width,newSize.height)];


    UIImage *newImage = UIGraphicsGetImageFromCurrentImageContext();

    UIGraphicsEndImageContext();