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Anti-Aliasing

Pedro Aug 30, 2011 03:37PM EDT

Is there a way to turn off anti-aliasing when saving using ImgXWriteImage?

3 Data Techniques Responses and 2 Community Responses

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DTI Support  Data Techniques Employee Aug 30, 2011 03:39PM EDT

Hello,

There is no antialiasing when you call ImgXWriteImage. It writes the exact image data it receives when you call it. Perhaps you are saving as JPG which is a lossless format which will cause artifacts in the image due to the compression ?

Thanks for your interest in our products and please let us know if you have any questions.

Sincerely,
Sean
Data Techniques Support

Up 8 Rated Down
Pedro  Data Techniques Employee Aug 30, 2011 03:50PM EDT

I have a PDF file that contains just black text. When viewing the PDF in Photoshop, the edges of the black text are jagged when zooming into the text, which is what I expect. Only black pixels exist.

However, when I open that PDF file using the ImgOpenSoloEx() function, immediately write the ImgMan handle received to file using the ImgXWriteImage() function as a PCX file, and then open the PCX file in Photoshop and zoom into a character, I see various shades of gray pixels around the border of the characters, which seems to indicate that anti-aliasing is being applied at some point.

I would like to avoid getting those shades of gray pixels around the text. Is there something I can do to achieve this?

Up -1 Rated Down
DTI Support  Data Techniques Employee Aug 30, 2011 03:53PM EDT

Hello,
OK, the text is being antialiased when you import the PDF file. The ImageMan PDF Import Addon will do that so the text is more readable on display, there is not a way to disable that in the current builds. I've added that as a request for a future release.


Up 8 Rated Down
Pedro  Data Techniques Employee Aug 30, 2011 04:51PM EDT

What's the likelihood that the request will be implemented? Is there a possible timeframe available? This is currently affecting our customers who want to print their images in CMY+K with our printers, meaning all black data will be printed using just black toner. Because of the anti-aliasing, they're seeing an CMY outline around the text.

Up 5 Rated Down
DTI Support  Data Techniques Employee Aug 30, 2011 04:53PM EDT

Hello,

I cant give you a timeframe at this point, Can you send us one of the PDFs in question so we can have a look ?

Thanks for your interest in our products and please let us know if you have any questions.

Sincerely,
Sean
Data Techniques Support

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