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Ramesh Ramalingam
Junior

India,
2018-09-06 07:29
(edited by Ohlbe on 2018-09-06 10:35)

Posting: # 19242
Views: 300
 

 PDF specifications [Software]

Dear All,

As per PDF specifications guidlines Scanned documents should scanned with resolution of 300 dots per inch (dpi) but our scanner having pixels per inch (ppi) setting option which is having automated OCR option. we are thinking that it won't have any disadvantages and/or in file size if we are scanned with resolution setting of PPI.

Could you please suggest.


Edit: title changed to lower case. Please don't SHOUT; see the forum policy [Ohlbe]
Helmut
Hero
avatar
Homepage
Vienna, Austria,
2018-09-06 11:41

@ Ramesh Ramalingam
Posting: # 19245
Views: 239
 

 DPI vs. PPI

Hi Ramesh,

» […] Scanned documents should scanned with resolution of 300 dots per inch (dpi) but our scanner having pixels per inch (ppi) setting option which is having automated OCR option. we are thinking that it won't have any disadvantages and/or in file size if we are scanned with resolution setting of PPI.

Technically PPI gives the input and DPI the output resolution (see there). Many scanners (falsely)* state DPI in the setup. If yours gives PPI, congratulations.

BTW, the guidance is not free from errors:

Create files from source documents using the “Optimize the PDF for fast web view” option to reduce file sizes and file opening times.

“Optimize for web” speeds up loading and – much more important – allows linking to a specific page (e.g., MyDocument.pdf#pageX) but files are always slightly larger.


  • I have three (HP, Canon, Dell). All give DPI…

Cheers,
Helmut Schütz
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Ramesh Ramalingam
Junior

India,
2018-09-11 05:45

@ Helmut
Posting: # 19259
Views: 132
 

 DPI vs. PPI

Dear Helmut!

Thank you very much for your ultimate inputs......
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