jcopy-paste an image provides different ocr results

[Youcef]

Hi everybody,

I'm simple copy paste an image in linux like that:

cp 7703_062.3B.tif 7703_062_copy.3B.tif

and then run tesseract for each with exactly same command line :

tesseract/api/tesseract --psm 6 -l spa 7703_062.3B.tif 7703_062.3B tesseract/tessdata/configs/unlv

tesseract/api/tesseract --psm 6 -l spa 7703_062_copy.3B.tif 7703_062_copy.3B tesseract/tessdata/configs/unlv

However the OCR results are different.
I opened the two images with python opencv and find that pixels are exacly the same.
It looks like some tiff tags are not copied well using 'cp', am I wrong?
How to copy-paste a tif image without any loss in tags?
Thanks for any help.

Regards
Youcef

[Youcef]

Ok i got it : i should copy paste the uzn file too!