C# Image Deskew
Has anyone seen any image deskew algorithms in c#? I have found: http://www.codeproject.com/KB/graphics/Deskew_an_Image.aspx
but unfortunately, it doesn't do very much for images without text. I am specifically trying to auto deskew an image of a book with solid edges, but minimal text.
Has anyone seen anything that may be able to 开发者_C百科do this?
The basic algorithm is to use a Hough transform to find the lines and then try to make most of the lines horizontal. Here's some basic code http://www.sydlogan.com/deskew.html
For your situation, you might want to target the transform at a piece of the image you know might have the best information. For example if there's a page border -- I'd need to see an example to give better advice.
Disclaimer, I work at Atalasoft.
Our DotImage toolkit has it built in for .NET and is runtime royalty-free for desktop applications. Code would be:
AtalaImage img = new AtalaImage("imagefile.tif");
AutoDeskewCommand cmd = new AutoDeskewCommand();
AtalaImage resultImage = cmd.Apply(img).Image;
resultImage.Save("result.tif", new TiffEncoder(), null);
Or something similar for multipage or other types of images.
We show how to integrate it with our viewer control in this video (at 1:14)
http://www.atalasoft.com/products/dotimage/tutorials/capture/lesson4.aspx
The videos are part of a series of building a document scanning application:
http://www.atalasoft.com/products/dotimage/tutorials/capture/lesson1.aspx http://www.atalasoft.com/products/dotimage/tutorials/capture/lesson2.aspx http://www.atalasoft.com/products/dotimage/tutorials/capture/lesson3.aspx
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