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SimonK147 Honor Student
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Not scanning to pdf in black and white. PDF file size much bigger than expected

Using scanning software supplied with the printer.

Scanning two page colour doc to black and white pdf file.

HPscan setup.png

 

Image produced appears as black and white when viewed in a pdf reader but file size is large compared to a scan on my brother portable scanner (932KB as opposed to 61KB).

 

Examination of header of produced pdf shows:

/XObject /Subtype /Image /Name /Im1 /Width 1654 /Height 2338 /Length 454440/ColorSpace /DeviceRGB /BitsPerComponent 8 /Filter [ /DCTDecode ] for each scanned page.

 

Header from my portable scanner for same doc and scan settings:

/Subtype/Image/Length 31668/Width 1662/Height 2344/BitsPerComponent 1/Filter/JBIG2Decode/ColorSpace/DeviceGray/Decode[ 1 0]>>stream

 

Why is this?

 

Bought this AllInOne" for the docment feeder on the scanner.

Scanning large, multipage docs for archiving.

Small filesize more important than high resolution/colour.

 

Large pdf filesize produced makes this product unsuitable for my application.

 

 

 

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HP Recommended

Not scanning to pdf in black and white. PDF file size much bigger than expected

@SimonK147 

 

From the list, there is an option called Save as PDF. Please use that option ?

 

Regards.

BH
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SimonK147 Honor Student
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Not scanning to pdf in black and white. PDF file size much bigger than expected

Thank you for the response.

 

"Single sided doc" is my custom setup, based upon "save to PDF"

As you can see from the right-hand side of the screenshot, the save format is PDF.

 

The output file is definitely a PDF as it can be read by a PDF reader. The issue is why it is being output in 8 bit rbg instead of 1 bit b&w as selected and why the file size is so much bigger than the same resolution b&w PDF created on my portable scanner

 

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SimonK147 Honor Student
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Not scanning to pdf in black and white. PDF file size much bigger than expected

Following up on my above question,

 

Repeated tests using default "Save to pdf" profile as suggested.

 

 

5200 settings pg1.png

 

Note the confirmation of black & white 1 bit in the 2nd settings page below.

 

5200 settings pg2.png

File size of result is 2.6MB.

Note the difference to a scan of the same document with the same settings on my Brother DSmobile portable. Less than 10% the size.

 

Output pdf size.png

 

Header of the file output by the 5200 still shows RGB 8 bit.

 

%PDF-1.7

1 0 obj

<</Type /XObject /Subtype /Image /Name /Im1 /Width 1181 /Height 1652 /Length 311139

/ColorSpace /DeviceRGB/BitsPerComponent 8 /Filter [ /DCTDecode ] >> stream

 

I also scanned the same doc in full colour on the Brother. 1.5MB, still 1/3 smaller than the allegedly black and white scan on the 5200.

 

Anybody know what, if anything, I'm doing wrong or should I just return this device for credit?

 

 

 

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