In mainly used and documented way Zxing library find codes only if code is aligned with guideline in camera viewfinder. However, I've found in zxing library comments like :
"Encapsulates logic that can detect a PDF417 Code in an image, even if the * PDF417 Code is rotated or skewed, or partially obscured."
So I suppose Zxing can find and decode rotated, skewed codes. I want help to find how to easily use the library for that.
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Please provide me the image you are trying to decode, I have written some code, I'll test that with your image. If it works good, I'll provide you that code otherwise, I'll try to improve and give it to you.