Hi Neil, Both forms of the book come up beautifully on the iPad; the online version in Safari and the downloaded PDF in iBooks. In portrait orientation they look strikingly clear and crisp. There was a bit of a delay when I scrolled forward many pages at a time as the smaller processor of the iPad raced to keep up, but after a delay of about 10 seconds the pages displayed as expected. Jumping to a random location in the book also incurred a 10 second or so delay but turning the pages at reading speed was not a problem.
The page numbering was the non-customised version -- that is to say page 6 of the text was page 12 in the thumbnails. Page 96 was still blurry. Cheers, Carlo On 01/01/2012, at 19:42 , Neil Houghton wrote: > Yes, The folder of JP2 files contains 136 images, of which 130 end up in the > pdf - so around 29 MB of the 30.2 MB total are compressed down to 4.2 MB > whilst keeping very good image quality - so the compression is VERY good. > > I can accept that Preview may need to uncompress the files to view them but > not only does it fail to recompress them, it actually expands them to 610 MB > - which seems ridiculous. > > As I said in a previous post: >> When I look at the properties of the pdf it says: >> PDF Producer: Recoded by LuraDocument PDF v2.28 - so this might be the >> program that did the page number magic ;o) > > I did a bit of looking around and it seems that it is the LuraDocument > program that does the compression: > <http://www.luratech.com/en/home/products/software-and-solutions-for-documen > t-processing/document-and-data-conversion-software/luradocument-pdf-compress > or.html> > > Some other online discussions suggest that the iPad may have trouble with > these highly compressed pdfs - I don't have an iPad yet - I think you do > Carlo? If so could you try viewing the original pdf and seeing if the iPad > can cope with it? > > The direct link to the pdf is > <http://www.archive.org/download/parishregister00brad/parishregister00brad.p > df> > > > Cheers > > > > Neil > -- > Neil R. Houghton > Albany, Western Australia > Tel: +61 8 9841 6063 > Email: n...@possumology.com > > > on 1/1/12 6:01 PM, cm at cm200...@gmail.com wrote: > >> It is interesting that the original JPEG files are actually bigger than the >> PDF. They must be using some type of compression. Perhaps Preview >> uncompressed >> the images and on saving failed to compress them again. >> >> Just idle speculation at this point. :-) >> >> C >> >> On 01/01/2012, at 17:49 , Neil Houghton wrote: >> >>> Hi Mike, >>> >>> Yes, I'm not sure what is happening. It isn't the page swapping because the >>> test I did before replying to Carlo was just opening the file in Preview and >>> then re-saving - without any page swapping. >>> >>> The original pdf creation was obviously very good - you can actually look at >>> the original scanned jp2 files and they are around 70MB worth - before >>> cropping etc - the cropped and straightened JP2s are 30MB worth and they >>> have compiled them into a 4.2MB pdf - with very good image quality. >>> >>> However the 610.4 MB file that Preview produces does seem excessive!!! >>> >>> >>> Cheers >>> >>> >>> Neil >>> -- >>> Neil R. Houghton >>> Albany, Western Australia >>> Tel: +61 8 9841 6063 >>> Email: n...@possumology.com >>> >>> >>> >>> on 1/1/12 5:18 PM, Mike Fuller at blis...@tpg.com.au wrote: >>> >>>> I'm running Mac OS 10.6.8. >>>> >>>> I was intrigued by your file sizes Neil so I tried saving a PDF book (52 >>>> pp) >>>> from Preview. >>>> >>>> Original size - 5.1MB - quality good >>>> Saved size - 4.9MB using no quartz filter - quality equally good >>>> Saved size - 1.9MB using reduce file size in quartz filter - quality >>>> relatively poor. >>>> >>>> Another scanned magazine (192 pp) >>>> >>>> Original size 83.3MB - quality good >>>> Saved size - 83.3MB using no quartz filter - same quality >>>> Saved size - 10.1MB using reduce file size - quality very poor >>>> >>>> So what was happening with your file sizes? (which I realise is what you >>>> were >>>> asking originally). I haven't tried swapping pages between copies yet - >>>> maybe >>>> later tonight and I'll let you know the results. I probably won't explore >>>> the >>>> numbering dilemma at this stage. >>>> >>>> Curiouser and curiouser >>>> >>>> Mike Fuller >>>> >>>> >>>> >>>> On 01/01/2012, at 4:03 PM, Neil Houghton wrote: >>>> >>>>> A further update - even though the file size has doubled - applying this >>>>> filter does significantly reduce the image quality. >>>>> >>>>> I may end up just keeping both copies of the book - it feels "wrong" but I >>>>> do get all pages in maximum image quality for less than 9MB in total ;o( >>>>> >>>>> Cheers >>>>> >>>>> >>>>> >>>>> Neil >>>>> -- >>>>> Neil R. Houghton >>>>> Albany, Western Australia >>>>> Tel: +61 8 9841 6063 >>>>> Email: n...@possumology.com >>>>> >>>>> >>>>> on 1/1/12 2:05 PM, Neil Houghton at n...@possumology.com wrote: >>>>> >>>>>> Hi Carlo, >>>>>> >>>>>> That's a good tip, thanks - I DID know about this but didn't actually >>>>>> think >>>>>> of it! - and I can't even blame the bubbles, they came later ;o) >>>>>> >>>>>> As a simpler test/comparison of this, I tried two things: >>>>>> 1. I opened the 4.2MB file in Preview and then just did a "Save as" with >>>>>> no >>>>>> file changes or filters applied: Resulting file size was 610.4 MB. >>>>>> 2. I then did the same with the "Reduce file size" filter applied: >>>>>> Resulting >>>>>> file size was 9.8MB - still well more than double the original file size >>>>>> - >>>>>> but MUCH better than 610MB!! >>>>>> >>>>>> While it would be NICE to end up with the original 4.2 MB file size, I >>>>>> could >>>>>> certainly live with the 9.8MB one. Now, if I could just solve the >>>>>> thumbnail >>>>>> re-numbering issue... >>>>>> >>>>>> >>>>>> Cheers >>>>>> >>>>>> >>>>>> >>>>>> Neil >>> > > > -- The WA Macintosh User Group Mailing List -- > Archives - <http://www.wamug.org.au/mailinglist/archives.shtml> > Guidelines - <http://www.wamug.org.au/mailinglist/guidelines.shtml> > Settings & Unsubscribe - > <http://lists.wamug.org.au/listinfo/wamug.org.au-wamug> -- The WA Macintosh User Group Mailing List -- Archives - <http://www.wamug.org.au/mailinglist/archives.shtml> Guidelines - <http://www.wamug.org.au/mailinglist/guidelines.shtml> Settings & Unsubscribe - <http://lists.wamug.org.au/listinfo/wamug.org.au-wamug>
