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PostProcessor v1.0 released!

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rob
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PostProcessor v1.0 released!

Post by rob » 24 Jun 2009, 18:08

This is the release of PostProcessor v1.0, an operating system independent program which takes images directly from your camera and converts them (hopefully) to nice deskewed, dekeystoned color and black-and-white images.

Download the zip file, and unzip wherever you want. The instructions are in the README.html file. READ THEM! Besides how to run the program, the instructions also give very important requirements for your camera images.

If you find any images that are not handled properly by PostProcessor, send them to me at the address in the Troubleshooting section of README.html.

I'll be releasing the source code later, at SourceForge, as soon as I decompress from writing and testing 9,000 lines of code.
Attachments
PostProcessor-1.2.zip
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Re: PostProcessor v1.0 released!

Post by rob » 25 Jun 2009, 16:09

Source code is now available here at SourceForge.
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jrichards
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Re: PostProcessor v1.0 released!

Post by jrichards » 26 Jun 2009, 18:04

On both windows and OS X I get the same error.

This is the Error:

Exception in thread "main" java.lang.NullPointerException
at java.util.Arrays.sort(Arrays.java:1079)
at postprocess.Main.main(Main.java:641)


Not sure what I am doing wrong. Here is the command that I run:

java -Xmx1024M -jar PostProcessor.jar L IMG_6550.JPG

When I run it I am in the same directory as the PostProcessor.jar file.

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Re: PostProcessor v1.0 released!

Post by rob » 26 Jun 2009, 19:26

Instead of:

java -Xmx1024M -jar PostProcessor.jar L IMG_6550.JPG

You need to specify the directory that IMG_6550.JPG is in:

java -Xmx1024M -jar PostProcessor.jar L some_directory
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Re: PostProcessor v1.0 released!

Post by rob » 27 Jun 2009, 12:01

I've released PostProcessor 1.1, and updated the file at the beginning of this post.

This version allows you to process a single image, or an entire directory of images. I added this feature because what jrichards was trying to do was perfectly reasonable :)
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Re: PostProcessor v1.0 released!

Post by jrichards » 27 Jun 2009, 18:22

I am still running into problems for some reason. Now when I run the command it starts to execute and then fails. Here is the output:

jason-richardss-macbook:PostProcessor-1.1 jasonrichards$ java -Xmx1024M -jar PostProcessor.jar L /Users/jasonrichards/Desktop/Test/
Reading IMG_6548.JPG...done. (lefthand page)

Binarizing expanded image...

Determining skew and projection...
Cleaning page and greeking text...
Locating page and text block outlines...
Processing original image...
Page luminosity = 0.09952426
Binarizing page...
Exception in thread "main" java.lang.IllegalArgumentException: negative border added!
at jleptonica.PIX.addBorderGeneral(PIX.java:352)
at postprocess.Main.process(Main.java:579)
at postprocess.Main.main(Main.java:662)
jason-richardss-macbook:PostProcessor-1.1 jasonrichards$



Here is the picture that I am trying to process:
IMG_6548.JPG
(286.54 KiB) Downloaded 2749 times

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Re: PostProcessor v1.0 released!

Post by rob » 27 Jun 2009, 19:54

Excellent (sort of). I'll take the image and see if I can improve the code!
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Re: PostProcessor v1.0 released!

Post by rob » 27 Jun 2009, 20:34

OK, there are a few problems with the image. Taking the pictures again will help:

1. Make the page fill more of the frame. The bigger the page, the better the final processed image. Try to make the page be at least 75% as tall as the entire image.

2. Insert a black piece of paper between the front and back covers and the text block. The problem here is that the shiny and colorful dust jacket is confusing the algorithm into thinking it is part of the page. In fact, this is probably a good idea for any hardcover book, and again will make the final image much better.

I can solve #1 within the program easily, but you will still end up with a worse final image. #2 is much harder, because now there are four categories for the program to look for: background, page, reflection, and dust jacket. Lots of work, and I'd have to contemplate the situation for a few weeks to figure out a solution. Or wait until 2025 for human-level AI (or so Ray Kurzweil says).

So try those and see what happens. I'll probably add the above suggestions to the README if they work for you!
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Carlos Pombo
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Re: PostProcessor v1.0 released!

Post by Carlos Pombo » 29 Jun 2009, 16:50

@ rob
Thank you so much.
Tested your PostProcessor release 1.1
It works almost perfect with text pages without pictures. Can I to suggest you a very small adjustment?
Processor crops text too tight. Have tested pages with a small skew view (less than 90º orthogonal photo view) and found that processor crops last letter/letters from longer lines due to skew and found also some clipping in last bottom line. Can you manage crop to not be so tight? 2, 3 or 4 millimeters tolerance outside of actual crop maybe.

Now; unfortunately for me I need to work with high quality reproduction of color books.
What I'm doing now is to shot RAW, to use Adobe bridge to crop Left and Right pages (need to reposition crop individually for each page). After go to Photoshop to tune page densities with Levels tool fixing Black point and cleaning whites recording this as an Action and then go back tom Bridge to batch process L/R pages.
A tool like yours with crop function alone it was a fantastic gift for photographers like me.

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Re: PostProcessor v1.0 released!

Post by rob » 29 Jun 2009, 17:46

Hi Carlos,

Can you send me a sample page that shows the overtight cropping? I think adding a small margin would help, but I need to know why the text was cropped too much.

Thanks!
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