Overlay on the photo: your box sampling frame (along the barcode axis, following the bar directions) scan bands band shown below fitted barcode ends.
The patch resampled so that bars are vertical. Rows of each band are averaged into a 1D darkness profile (black), which is explained by a synthesized signal (red): blurred templates of the chosen symbols on a module grid (gray ticks) with perspective, blur and ink spread fitted. The checksum-valid symbol sequence that best explains the profile is the result.