[Tool] Multi-column PDF files on 6 inch display. - Page 3

inew · 11-20-2008, 02:27 AM

Very impressive!

This kind of design style is just what I dreamed: I press one button and you do all the work!!!!!

From algorithm's point of view, I think the most interesting part is the algorithm that detects blocks of contents from the pdf layout. If the program can incorporate the algorithm that breaks lines, it will be able to break 1-page wide blocks to 1/2-page wide block. The program will be a star to handle academic papers then (what a desperate target?). There may be many small things need to be tweaked, but the major function (handle sing-column and double-column) is there.

And, please, please, please keep the current operation style. I understand that you experts like commend line a lot. But this types of clean and intuitive UI is very important to the newbies (Do I need some HCI refences to support this argument?).

At last, a small thing I think may make the output looks better: when segmenting the small block to fit into the 6'' pages, you may want to detect whether a cut may cross some content or not. If it does, we may need to move the cut a little bit higher. This is only a small problem. The current tool is fantastic at this stage.

Ulysses · 11-20-2008, 02:28 AM

Quote:

Originally Posted by Taesoo Kwon

I hope the problem will disappear after downloading the version 0.3.
If it continues to crash, please send me the PDF file to me by e-mail.

I tried 0.3 and it's perfect, thank you.

nrapallo · 11-20-2008, 07:35 AM

Quote:

Originally Posted by Ulysses

I tried 0.3 and it's perfect, thank you.

In a word: AWESOME!

In two words: VERY FAST!!

In three: Caritas' Reflow Works!!!

In four: Great Job Taesoo Kwon!!!!

'nuff said; try it, you'll like it!

nrapallo · 11-20-2008, 08:47 AM

Taesoo Kwon:

As a challenge, this is the first .pdf (see attachment below) I tried to convert to ebook (.html and images) that I was not successful in getting anywhere near a satisfactory result.

I tried converting it with early version of PDFRead and it did work quite well for me. That convinced me that .pdf to images was the only solution for complex .pdfs. It made me then request that color support be added to PDFRead v1.7; and that's why I'm involved with PDFRead v1.8!

I just tried to get two column output using PaperCrop 0.3 and this .pdf, but wasn't able to.

What algorithm would you suggest in getting this .pdf converted using a combination of reflow and/or two-column support?

Like I said before, a challenge!

Taesoo Kwon · 11-20-2008, 10:01 PM

Quote:

Originally Posted by nrapallo

I just tried to get two column output using PaperCrop 0.3 and this .pdf, but wasn't able to.
What algorithm would you suggest in getting this .pdf converted using a combination of reflow and/or two-column support?

That pdf file is really challenging. Current algorithm cannot correctly seperate non-convex regions overlapping both horizontally and vertically. There may exist good algorithms that can handle this case, but I don't know any of them at the moment. (I am not an expert in the field of document segmentation.) Also, such algorithm, if any, may probably increase processing time.

Of course, it is easy to segment the pdf file in a PDFRead-way (simply dividing a page into two regions.) I would include this over-simplified but robust segmentation method into PaperCrop as an option someday.

nrapallo · 11-20-2008, 10:15 PM

Quote:

Originally Posted by Taesoo Kwon

That pdf file is really challenging.

Yep, it is! Given that that .pdf is difficult to segment, I hope it doesn't discourage you. I was only trying to see if you may have had any insights on how best to tackle it's conversion.

Your program couldn't figure it out because it's not two-column but behaves like it is and reflow get confused with large blocks of center inset images.

I guess we'll leave it until version 0.4 ...

Thanks for trying!

Ulysses · 11-23-2008, 03:06 PM

Where are the pictures stored? I mean I don't see anything in a folder which is created together with PDF. Is there a way to get those pictures?

soilwork · 11-24-2008, 12:37 PM

Quote:

Originally Posted by Ulysses

Where are the pictures stored? I mean I don't see anything in a folder which is created together with PDF. Is there a way to get those pictures?

You can edit 'config.lua' to get image files instead of one PDF.
The option 'output_to_pdf' should be changed to 'false' as follows.

Code:

output_to_pdf=false

hansl · 12-01-2008, 04:22 AM

withdrawn

hansl · 12-08-2008, 05:10 AM

withdrawn

Taesoo Kwon · 12-13-2008, 12:52 PM

Sorry for a late response.
Hansl, could you please send me the PDF file to me? (taesoobear@gmail.com)
I may not be able to fix the bug soon but I will try when I have time.

hansl · 12-18-2008, 05:48 AM

Sorry, I removed the generated pdf.
I'm too busy currently to deal with the issue, but thanks for your reply.

hansl

=X= · 12-22-2008, 03:08 PM

I have a PDf with 300DPI images. I'd like to crop the PDF but keep the 300DPI. However PaperCrop is converting the image to 72DPI. Is there a setting that I can set to keep the DPI the same resolution as the original PDF (e.g. 300DPI) ?

Thank you,
=X=

Taesoo Kwon · 12-26-2008, 09:24 AM

Quote:

Originally Posted by =X=

can I keep the DPI the same resolution as the original PDF (e.g. 300DPI) ?

No, you cannot. Sorry.

=X= · 01-08-2009, 01:47 AM

I'm embarrassed to ask, but how do I get Caritas' Reflow to work. And how can I validate that it works.
=X=

12-01-2008, 04:22 AM	#39
hansl Zealot Posts: 112 Karma: 113786 Join Date: Jul 2008 Location: Germany Device: Sony PRS-T3S, CoolReader on 4'' Android phone	withdrawn Last edited by hansl; 12-18-2008 at 05:49 AM.

12-08-2008, 05:10 AM	#40
hansl Zealot Posts: 112 Karma: 113786 Join Date: Jul 2008 Location: Germany Device: Sony PRS-T3S, CoolReader on 4'' Android phone	withdrawn Last edited by hansl; 12-18-2008 at 05:49 AM.

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11-20-2008, 02:27 AM	#31
inew Member Posts: 15 Karma: 10 Join Date: Oct 2008 Device: PRS 500	Very impressive! This kind of design style is just what I dreamed: I press one button and you do all the work!!!!! From algorithm's point of view, I think the most interesting part is the algorithm that detects blocks of contents from the pdf layout. If the program can incorporate the algorithm that breaks lines, it will be able to break 1-page wide blocks to 1/2-page wide block. The program will be a star to handle academic papers then (what a desperate target?). There may be many small things need to be tweaked, but the major function (handle sing-column and double-column) is there. And, please, please, please keep the current operation style. I understand that you experts like commend line a lot. But this types of clean and intuitive UI is very important to the newbies (Do I need some HCI refences to support this argument?). At last, a small thing I think may make the output looks better: when segmenting the small block to fit into the 6'' pages, you may want to detect whether a cut may cross some content or not. If it does, we may need to move the cut a little bit higher. This is only a small problem. The current tool is fantastic at this stage.

11-23-2008, 03:06 PM	#37
Ulysses Member Posts: 11 Karma: 10 Join Date: Oct 2008 Device: Hanlin V3	Where are the pictures stored? I mean I don't see anything in a folder which is created together with PDF. Is there a way to get those pictures?

12-13-2008, 12:52 PM	#41
Taesoo Kwon Enthusiast Posts: 27 Karma: 163 Join Date: Nov 2008 Device: Kobo wifi	Sorry for a late response. Hansl, could you please send me the PDF file to me? (taesoobear@gmail.com) I may not be able to fix the bug soon but I will try when I have time.

12-18-2008, 05:48 AM	#42
hansl Zealot Posts: 112 Karma: 113786 Join Date: Jul 2008 Location: Germany Device: Sony PRS-T3S, CoolReader on 4'' Android phone	Sorry, I removed the generated pdf. I'm too busy currently to deal with the issue, but thanks for your reply. hansl

12-22-2008, 03:08 PM	#43
=X= Wizard Posts: 3,671 Karma: 12205348 Join Date: Mar 2008 Device: Galaxy S, Nook w/CM7	I have a PDf with 300DPI images. I'd like to crop the PDF but keep the 300DPI. However PaperCrop is converting the image to 72DPI. Is there a setting that I can set to keep the DPI the same resolution as the original PDF (e.g. 300DPI) ? Thank you, =X=

01-08-2009, 01:47 AM	#45
=X= Wizard Posts: 3,671 Karma: 12205348 Join Date: Mar 2008 Device: Galaxy S, Nook w/CM7	I'm embarrassed to ask, but how do I get Caritas' Reflow to work. And how can I validate that it works. =X=

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