How can I efficiently detect all blank pages in a PDF?
My current solution is opening "the Page Thumbnails pane on the left", and spotting the blank pages. What's a more efficient solution, since this Jul 2015 post?
I'm not asking about deleting the blank pages automatically; I must check myself if the pages are blank before deleting.
asked May 30 '18 at 2:29
Greek - Area 51 ProposalGreek - Area 51 Proposal
44832752
add a comment |
My current solution is opening "the Page Thumbnails pane on the left", and spotting the blank pages. What's a more efficient solution, since this Jul 2015 post?
I'm not asking about deleting the blank pages automatically; I must check myself if the pages are blank before deleting.
asked May 30 '18 at 2:29
Greek - Area 51 ProposalGreek - Area 51 Proposal
44832752
You could speed up a manual process by displaying a grid of page thumbnails, say a 5 high x 10 wide grid, so you could see 50 pages at a time. It would take just seconds to screen them, and delete blanks.
– fixer1234
May 31 '18 at 0:58
@fixer1234 Thanks. I updated my post to clarify.
– Greek - Area 51 Proposal
Aug 24 '18 at 2:00
add a comment |
My current solution is opening "the Page Thumbnails pane on the left", and spotting the blank pages. What's a more efficient solution, since this Jul 2015 post?
I'm not asking about deleting the blank pages automatically; I must check myself if the pages are blank before deleting.
asked May 30 '18 at 2:29
Greek - Area 51 ProposalGreek - Area 51 Proposal
44832752
My current solution is opening "the Page Thumbnails pane on the left", and spotting the blank pages. What's a more efficient solution, since this Jul 2015 post?
I'm not asking about deleting the blank pages automatically; I must check myself if the pages are blank before deleting.
asked May 30 '18 at 2:29
Greek - Area 51 ProposalGreek - Area 51 Proposal
44832752
asked May 30 '18 at 2:29
Greek - Area 51 ProposalGreek - Area 51 Proposal
44832752
edited Jan 15 at 6:50
Greek - Area 51 Proposal
asked May 30 '18 at 2:29
Greek - Area 51 ProposalGreek - Area 51 Proposal
44832752
asked May 30 '18 at 2:29
Greek - Area 51 ProposalGreek - Area 51 Proposal
44832752
asked May 30 '18 at 2:29
Greek - Area 51 ProposalGreek - Area 51 Proposal
44832752
44832752
You could speed up a manual process by displaying a grid of page thumbnails, say a 5 high x 10 wide grid, so you could see 50 pages at a time. It would take just seconds to screen them, and delete blanks.
– fixer1234
May 31 '18 at 0:58
@fixer1234 Thanks. I updated my post to clarify.
– Greek - Area 51 Proposal
Aug 24 '18 at 2:00
add a comment |
You could speed up a manual process by displaying a grid of page thumbnails, say a 5 high x 10 wide grid, so you could see 50 pages at a time. It would take just seconds to screen them, and delete blanks.
– fixer1234
May 31 '18 at 0:58
@fixer1234 Thanks. I updated my post to clarify.
– Greek - Area 51 Proposal
Aug 24 '18 at 2:00
You could speed up a manual process by displaying a grid of page thumbnails, say a 5 high x 10 wide grid, so you could see 50 pages at a time. It would take just seconds to screen them, and delete blanks.
– fixer1234
May 31 '18 at 0:58
You could speed up a manual process by displaying a grid of page thumbnails, say a 5 high x 10 wide grid, so you could see 50 pages at a time. It would take just seconds to screen them, and delete blanks.
– fixer1234
May 31 '18 at 0:58
@fixer1234 Thanks. I updated my post to clarify.
– Greek - Area 51 Proposal
Aug 24 '18 at 2:00
@fixer1234 Thanks. I updated my post to clarify.
– Greek - Area 51 Proposal
Aug 24 '18 at 2:00
add a comment |
1 Answer
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As a start, it it quite difficult to determine if a page actually is blank. For example, there might be objects visible outside of the PDF box of your choice (like trimming marks), or object layers which can be switched on/off conditionally.
For a programmatic solution, you could either
use a library like
PoDoFoto load the PDF in question into memory, analyze each page object stream, and look for any painting commands/embedded XObjects.or (on MacOS) use
CGContextDrawPDFPage(Core Graphics) to render each page - a low resolution like 72dpi should do -, and to scan for non-white pixels in the resulting image.
answered May 30 '18 at 11:49
jvbjvb
1,150413
add a comment |
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As a start, it it quite difficult to determine if a page actually is blank. For example, there might be objects visible outside of the PDF box of your choice (like trimming marks), or object layers which can be switched on/off conditionally.
For a programmatic solution, you could either
use a library like
PoDoFoto load the PDF in question into memory, analyze each page object stream, and look for any painting commands/embedded XObjects.or (on MacOS) use
CGContextDrawPDFPage(Core Graphics) to render each page - a low resolution like 72dpi should do -, and to scan for non-white pixels in the resulting image.
answered May 30 '18 at 11:49
jvbjvb
1,150413
add a comment |
As a start, it it quite difficult to determine if a page actually is blank. For example, there might be objects visible outside of the PDF box of your choice (like trimming marks), or object layers which can be switched on/off conditionally.
For a programmatic solution, you could either
use a library like
PoDoFoto load the PDF in question into memory, analyze each page object stream, and look for any painting commands/embedded XObjects.or (on MacOS) use
CGContextDrawPDFPage(Core Graphics) to render each page - a low resolution like 72dpi should do -, and to scan for non-white pixels in the resulting image.
answered May 30 '18 at 11:49
jvbjvb
1,150413
add a comment |
As a start, it it quite difficult to determine if a page actually is blank. For example, there might be objects visible outside of the PDF box of your choice (like trimming marks), or object layers which can be switched on/off conditionally.
For a programmatic solution, you could either
use a library like
PoDoFoto load the PDF in question into memory, analyze each page object stream, and look for any painting commands/embedded XObjects.or (on MacOS) use
CGContextDrawPDFPage(Core Graphics) to render each page - a low resolution like 72dpi should do -, and to scan for non-white pixels in the resulting image.
answered May 30 '18 at 11:49
jvbjvb
1,150413
As a start, it it quite difficult to determine if a page actually is blank. For example, there might be objects visible outside of the PDF box of your choice (like trimming marks), or object layers which can be switched on/off conditionally.
For a programmatic solution, you could either
use a library like
PoDoFoto load the PDF in question into memory, analyze each page object stream, and look for any painting commands/embedded XObjects.or (on MacOS) use
CGContextDrawPDFPage(Core Graphics) to render each page - a low resolution like 72dpi should do -, and to scan for non-white pixels in the resulting image.
answered May 30 '18 at 11:49
jvbjvb
1,150413
answered May 30 '18 at 11:49
jvbjvb
1,150413
answered May 30 '18 at 11:49
jvbjvb
1,150413
answered May 30 '18 at 11:49
jvbjvb
1,150413
1,150413
add a comment |
add a comment |
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You could speed up a manual process by displaying a grid of page thumbnails, say a 5 high x 10 wide grid, so you could see 50 pages at a time. It would take just seconds to screen them, and delete blanks.
– fixer1234
May 31 '18 at 0:58
@fixer1234 Thanks. I updated my post to clarify.
– Greek - Area 51 Proposal
Aug 24 '18 at 2:00