Do you know how to make the vertical bars in this image more visible? Especially on the right side. I'd like to have the vertical bars more sharp and outstanding from the background)? I tried using the sharpening tool in photoshop, but that wasn't sufficient.
This is a contrast issue more than a sharpness issue. Try
Cmd+Shift+Alt+L for Auto Contrast or
Image → Auto Contrast.
Image → Adjustments → Black & Whiteto get specific control.
I cleaned it up to a degree using Perspective transform, Curves, Dust & Scratches (filter) and Unsharp mask. This useful website: https://online-barcode-reader.inliteresearch.com/ then read the code as:
No idea if that's right, but I tried another cleanup of the same image and it read the same, so I am quite confident.
The little graphic appears to indicate the whole image is being used...