how to realize highpass filter and lowpass filter

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This topic and its replies were posted before the current version of LEADTOOLS was released and may no longer be applicable.

#1 Posted : Tuesday, November 3, 2009 8:48:33 PM(UTC)

wjh0574

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Posts: 16

hello all:

i use the leadtools 13 and coder with VC .i want to know if there are have highpass filter and low pass filter function in the leadtools or how can i realize highpass filter and lowpass filter.
thank you very much.

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wjh0574


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#2 Posted : Wednesday, November 4, 2009 6:17:54 AM(UTC)

Adnan Ismail

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Posts: 3,022

Was thanked: 2 time(s) in 2 post(s)

Our engineers added L_HighPassFilterBitmap function to LEADTOOLS v14.5 and later versions of LEADTOOLS SDK. This function was not available in LEADTOOLS v13.

Other functions were also added after v13, such as L_AllocFTArray and L_FrqFilterBitmap (v14), which allow you to perform frequency filtering of the image.

If you like to try these functions, you can download the free evaluation edition of LEADTOOLS v16.5 from our site.

#3 Posted : Wednesday, November 4, 2009 3:16:24 PM(UTC)

wjh0574

Groups: Registered
Posts: 16

hello Adnan Ismail:
thank you very much! i'll use leadtools v16.5.we also buy the the leadtools v16.5.
have a nice day!
----------------------
wjh0574

#4 Posted : Sunday, February 21, 2010 9:51:06 PM(UTC)

GRAVURE SYSTEMS

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Posts: 5

Good Morning
we just downloaded your version 16.5
I used search on your documentation to find the function L_HighPassFilter with no result.
Please help

Rainer

#5 Posted : Monday, February 22, 2010 2:42:56 AM(UTC)

Adnan Ismail

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Posts: 3,022

Was thanked: 2 time(s) in 2 post(s)

Rainer,
If you open our LEADTOOLS Raster Imaging C DLL help file, copy and paste the following string in the search tab text box or in the Index tab:
L_HighPassFilterBitmap
A shortcut to the help file can be found here:
[LEADTOOLS 16.5] folder\Shortcuts\C DLL\01 Raster Imaging Help.lnk

Also, this is a link to our online documentation for this topic:
http://www.leadtools.com/help/leadtools/v16/main/api/Dllref/L_HighPassFilterBitmap.htm

#6 Posted : Monday, February 22, 2010 9:17:06 PM(UTC)

GRAVURE SYSTEMS

Groups: Registered
Posts: 5

Hello Adnan Ismail,

Thank you very much for your fast reply, it was very helpfull for us. Please allow us to contact you for further questions.

Regards

Rainer

#7 Posted : Tuesday, February 23, 2010 4:18:54 AM(UTC)

Adnan Ismail

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Posts: 3,022

Was thanked: 2 time(s) in 2 post(s)

Rainer,
Feel free to contact us anytime you have a question about our toolkits and products.
If your question is not a follow-up for the same issue above, please open a new forum thread for it. You can also email your question to our free support service support@leadtools.com or consider using our other support features explained on this page:
http://www.leadtools.com/support/supportoptions.htm

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