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horitonztal lines remove Started by davidhan at 06-30-2008 7:34. Topic has 10 replies. LEAD Support Fo... » Developer » Image Processin... » horitonztal lines remove

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06-30-2008, 7:34 davidhan Joined on 06-26-2008 Posts 9 horitonztal lines remove Attachment: Images.zip Hi i am trying to remove a horitonztal lines and found some that the LineRemoveCommand.Wall is having some strange behaviour. I have attached the settings Overfilter Settings command.Type = LineRemoveCommandType.Horizontal; command.Flags = LineRemoveCommandFlags.UseGap; command.GapLength = 0; command.MaximumLineWidth = 6; command.MinimumLineLength = 60; command.MaximumWallPercent = 99; command.Wall = 7;   Normal Settings command.Type = LineRemoveCommandType.Horizontal; command.Flags = LineRemoveCommandFlags.UseGap; command.GapLength = 0; command.MaximumLineWidth = 6; command.MinimumLineLength = 60; command.MaximumWallPercent = 30; command.Wall = 7; Regards David        Report

06-30-2008, 9:35 Adam Boulad Joined on 09-16-2007 Posts 406 Re: horitonztal lines remove David, The LineRemoveCommand Class removes horizontal and vertical lines in 1-bit black and white image. The images that you sent me are not 1-bit black and white images. Adam Boulad LEADTOOLS Technical Support    Report

07-03-2008, 3:25 davidhan Joined on 06-26-2008 Posts 9 Re: horitonztal lines remove Attachment: Images.zip  Adam Boulad wrote: David, The LineRemoveCommand Class removes horizontal and vertical lines in 1-bit black and white image. The images that you sent me are not 1-bit black and white images. Hi Adam Boulad, Sorry i have re-attached the images with 1-bit black and white settings Here is the image filtering settings for the images inside the zip file. For img_after_OverFilter.TIF : command.MinimumLineLength = 65;               command.MaximumLineWidth = 6; command.MaximumWallPercent = 99; command.Wall = 7; For img_after_Normal.TIF : command.MinimumLineLength = 65;               command.MaximumLineWidth = 6; command.MaximumWallPercent = 99; command.Wall = 5; I do notice that the MaximumWallPercent  would affect the line removal, and would like to know if the Wall  height is related to the MaximumLineWidth ? any suggestion for the wall height settings? Regards David    Report

07-03-2008, 6:23 Adam Boulad Joined on 09-16-2007 Posts 406 Re: horitonztal lines remove David, The wall height is not directly related to the line width, but should be larger than the line width. If you specify a value of 5 for the wall, the maximum line width should be less than 5, because the wall must be larger than the line. If you want to get a description of all the settings in one help topic, see the API help file topic for the LINEREMOVE structure. Here's a link to the online version: http://www.leadtools.com/Help/LEADTOOLS/v15/Main/API/Dlldtyp/LINEREMOVE.htm Adam Boulad LEADTOOLS Technical Support    Report

07-03-2008, 6:58 davidhan Joined on 06-26-2008 Posts 9 Re: horitonztal lines remove Hi Adam Boulad, I did read the API help file and thats why for the wall height i put +1 from the MaxLineWidth. However from the image i sent to you , althought it still over filtering the "XXXXXX" word. Please advice.   Regards, David       Report

07-06-2008, 9:16 Adam Boulad Joined on 09-16-2007 Posts 406 Re: horitonztal lines remove David, I tried the following settings and the function removed the horizontal lines without the XXXXX word: Minimum length = 80 Maximum width = 3 Wall Height = 3 Max wall percent = 13 Please try these settings. Adam Boulad LEADTOOLS Technical Support    Report

07-08-2008, 2:39 davidhan Joined on 06-26-2008 Posts 9 Re: horitonztal lines remove Thanks Adam B, But from my earlier post my settings can removed the  horizontal lines without the "XXXXX" word already. See Below: Minimum length = 65;               Maximum width = 6; Wall Height  = 5; Max wall percent = 99;  I just don't understand that with increase of Wall Height to "7" , it will start to over filter the "XXXXX" word. Regards, David    Report

07-08-2008, 10:42 Adam Boulad Joined on 09-16-2007 Posts 406 Re: horitonztal lines remove David, So far, I don't have the exact conditions that trigger the problem at your side. Please re-attach the image that is actually given to to our toolkit for line removal (the 1-bit black and white image), and I will examine the case here using the values you sent. If I find a problem I can't solve, I will report it to our engineers. Adam Boulad LEADTOOLS Technical Support    Report

07-09-2008, 6:10 davidhan Joined on 06-26-2008 Posts 9 Re: horitonztal lines remove Attachment: over filter img.zip Hi Adam Boulad, I have re-attached the problem image and save it as  (the 1-bit black and white image). Let me clarify the questions we have: 1. We need to know the reason why when we have the following setting,  the "XXXXXX" pattern is regarded as horizontal line and the result is overfiltered. Minimum length = 65;               Maximum width = 6; Wall Height  = 7; Max wall percent = 99; 2. How does the application measure the wall height in case it is a slanting line come across the line going to remove (like this case)? 3. Is that in all occasion that the wall height should be equal or larger than line width? As you have provied an configuration sample in this case that the wall height is equal to the line width. Please revert in your earliest convenience. Regards David    Report

07-09-2008, 11:40 Adam Boulad Joined on 09-16-2007 Posts 406 Re: horitonztal lines remove David, I have reported this issue (The removal of XXXX) to our engineers under incident number 7118AMN, Please keep this number for future inquiry regarding this incident. I will update this forum post with changes regarding this incident. Adam Boulad LEADTOOLS Technical Support    Report

07-30-2008, 10:13 Adam Boulad Joined on 09-16-2007 Posts 406 Re: horitonztal lines remove David, Our engineers have marked this incident as 'Not a Bug' because the parameters are not appropriate. They have also provided us with the following notes: - The image is small and clipped from a larger image, this should be considered when filling the variables. For example, if you want to remove lines from a region, you must consider the original image dimensions and don’t consider region dimensions as your reference. - Minimum length should be more than 65. 65 is too small value especially in this image, because the letters are large relatively and we don’t want to remove lines form letters. - The Max wall percent of 99% is a drastic percentage here. - Also if you know that the lines always be framing the image you could use border remove function and it will work manifestly. - This is a very rare case (small image with large letters, joined Xs). Note: the default values in the main Demo work properly with this image. Adam Boulad LEADTOOLS Technical Support    Report

LEAD Support Fo... » Developer » Image Processin... » horitonztal lines remove

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