Often I create PDF's from screencaptures.
In case of a series of sequential screencaptures I wish to use the combine files to PDF (context menu option).
On the other hand, in cases of single screenshots, or just a very few, I use the create PDF from Clipboard.
It strikes me that the quality of the resulting 'binder1.pdf' is slightly lower than those ones created using the Clipboard option.
This may have some effects on text recognition.
Above are both 200% zoom, hopefully it shows the difference.
Can this be avoided with some preference.
Note: I donot mind the size of the file, for me the best quality counts.
oh, btw, under binder options file size is set to large. makes no difference.
If you would set your screen capture app to use PNG or Tiff instead of JPEG you would avoid this.
This is a result of the compression used for JPEG files. JPEG is a Lossy Format and each time its compressed and re-saved you get this.
Even just the act of opening to a view a JPEG decompresses the file and when quit recompresses the file. Each time it is recompressed detail is lost.
Once or twice there is little perceptible effect. but after 8-10 times the effect begins to happen.
When I see a File that looks like your second example Ican tell its JPEG file without even looking at the extension
Thanks. Maybe I should be ashamed, maybe not..,
but in fact it would be the very first time I would be using PNG actually.
Whilst writing this I checked JPG vs PNG and stumbled over
Which is pretty much what you meant.
That said, I did a test. Scanned an invoice using PNG at 300dpi.
a) create PDF from file
b) add page from clipboard.
both zoomed at 200%
Still the create PDF from file is a bit 'blurry' - how do you say - artifacts.
Looks as if Acrobat is using JPEG compression itself (though not quite as badly).
First thing to check.
If you take just one of these PNG files and use Create PDF from file (not From Multiple Files), do you see the same effect? If so, go back into create from file and click Settings. For Color be sure to use ZIP.
"Problem" still remains, also with a single file.
Settings.. eh .. where?
Create PDF from file, opens Explorer, you mean the "Settings..." above the filenamebox?
That is greyed out, no matter what file I select, the png file or any earlier jpg's.
maybe I should you maximum quality here?
By the way, the png sizes are a bit bigger than the jpg (same scan)
|Test PNG 150 dpi 24bit color - 05-08-2013 16-33-25.png||671.744|
|Test PNG 300 dpi 24bit color - 05-08-2013 16-35-47.png||2.781.184|
|Test JPG 300dpi-05-08-2013 17-18-13.jpg||253.952|
(need to check out now, will revert on your response tomorrow)
More... set the Grayscale settings too if your scans are not colour (they might appear as greyscale or colour in PNG).
More...if you are NOT doing OCR, but scanning for screen viewing and printing, 200 dpi is probably plenty; more would be extravant on disk space. Scanning at monochrome will make by far the smallest but you might want a higher resolution. Carry on with the experiments, it's always worth doing a random selection of originals before committing to a big pile of paper.
Below find the steps I do with screencaptures, when creating it from clipboard.
Create from clipboard
Tools->Text Recognition->In this file
PDF Output Style: searchable Image (Exact)
Then when doing a search, the text is found.
Obviously, this depends on the quality of the original quality of the input.
As for using PNG->ZIP: my mistake, I did not scroll up in the selection, ahum.. saw only JPEG Maximum and didn't notice the ZIP higher up the list. Sorry.
I have given it a few tries now, with this ZIP-thing and it works wonderful!
Even at 800% I see no difference between this and the PDF from clipboard.
Initially I assumed that saving, no matter what best settings, from clipboard to file, resulted in a minor quality loss, which normally is so minor that usually nobody cares.
I will indeed switch to PNG now
MANY THANKS indeed for your advice, it is truly appreciated!!