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Question

Question

OCRing Photographs

asked on October 13, 2015

Before we upgraded to 9, we use to be able to OCR photographs & it showed "All" instead of "None" in the OCR column.  Now when you try to OCR photographs it gives 2 errors:

"error reading file. /  (6408)" & "error preparing page for OCR / (404)"

Why is this happening?
 

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Replies

replied on October 13, 2015

The resolution might be too high or too low for the OCR engine, what are the dimensions and DPI of one of the problematic images? You can see those in the file properties:

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replied on October 13, 2015

Here are the stats

Capture 2.PNG
Capture.PNG
Capture 2.PNG (22.39 KB)
Capture.PNG (24.18 KB)
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replied on October 13, 2015

It's just weird that we are doing nothing different with our photograph taking or downloading.  And now that we upgraded to 9 from 8, that the OCR doesn't work any more on photographs.

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replied on October 13, 2015

The OCR engine changed between version 8 and 9. The problem appears to be that the DPI is 1.

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replied on October 13, 2015

They normally start out with this dpi.  I just exported that image from Laserfiche.

Capture 3.PNG
Capture 3.PNG (5.43 KB)
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replied on October 13, 2015

Is there anything I can do before I import the photographs so that they will OCR?

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replied on October 13, 2015

If you really think it's a DPI metadata issue at the file level causing the OCR problem that's easy to test. Just grab a copy of exiftool and you can set the dpi to anything you want - it doesn't change the actual image at all.

Geoff

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replied on October 13, 2015

It seems like a problem with the camera software that generated the images. They come out of Laserfiche at 96 dpi because it detects the incorrect resolution during export.

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replied on October 13, 2015

Just to be clear, was the 1dpi image the one you imported into laserfiche? Did the image go through any processing since it came from the camera?

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replied on October 13, 2015

No, it's more like that 96 dpi capture shot I put up.

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replied on October 13, 2015

It's probably just the upgrade.  Nothing different has happened with the cameras or the loading process.  And it's not that there is much or anything to be OCR'd on photographs.  It was just bugging me.  So I thought I'd hop on & see if there was anything to do about it.

 

 

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replied on October 13, 2015

It sounds like you're saying that 96 dpi images are changed to 1 dpi on import. That's definitely unexpected and not desired. At this point, it's probably best you take this up to your reseller and Tech Support since it would be easier to figure out what's going on if we had sample images.

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replied on October 14, 2015

I've tried converting all the images to a multi-paged pdf & then importing that PDF into Laserfiche & everything works now.  It's one extra step, but at least the OCR now works.  It's doubled the dpi from 96 to 192.

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