Consistent lighting with high contrast, little to no gradient, and clear focus is critical to achieving optimal BQM results. Maximum pixel intensity should be between around 160 and 200 with reasonably good contrast. Ensure there are no defects or glare on the image; no specular spots should be present.
Consider using a polarized light filter accessory to eliminate glare. A clean and consistent barcode is essential for BQM grading; a polarizer can be helpful to eliminate glare that could compromise the barcode image.
Position the barcode close to the center of the Field of View (FOV) to minimize any optical distortion and ensure that the barcode is parallel to the camera plane on the device so the edges are parallel to the image border.
