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Crowd support wanted for adding metadata to READ_PNG and WRITE_PNG [message #93610]

Sun, 04 September 2016 20:11

andrewcool777
Messages: 27
Registered: November 2012

Junior Member

Hi All,

The PNG image format is a wonderous thing. Lossless, but with user selectable variable compression, 8 or 16bit image data, and most importantly, the ability to
have user-defined metadata!

Yet for some reason, in their infinite wisdom, RSI never provided the functionality to read or write the metadata when they wrote the routines! :-(

I run a number of airglow cameras, provided by the great guys at Keo Scientific,
and the images are saved as PNG files, with a basic set of metadata. Now I've been able to write IDL code to extract that metadata, and write PNG files with (extended, modified) metadata, as reported previously, but it's quite (read _very_) slow, and would definitely be better off done within the IDL Read_PNG and Write_PNG routines!

However, as I'm the only IDL user on the planet to request this feature, I'm told by Harris Support that it won't happen unless more users put their hands up and
say "Me too, please!"

So here's my plea to you. If you think it might be a Good Thing to have IDL's
own PNG routines handle the reading and writing of user supplied metadata, please
submit a Feature Request to support@harris.com to this effect.

Many Hosannas will be said in your name for doing so...

Regards,

Andrew Cool
www.skippysky.com.au (for all your astronomy weather forecast needs...)

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[Message index]

		Crowd support wanted for adding metadata to READ_PNG and WRITE_PNG By: andrewcool777 on Sun, 04 September 2016 20:11
		Re: Crowd support wanted for adding metadata to READ_PNG and WRITE_PNG By: markb77 on Tue, 06 September 2016 04:26
		Re: Crowd support wanted for adding metadata to READ_PNG and WRITE_PNG By: Dick Jackson on Tue, 06 September 2016 08:31
		Re: Crowd support wanted for adding metadata to READ_PNG and WRITE_PNG By: andrewcool777 on Mon, 26 September 2016 17:25
		Re: Crowd support wanted for adding metadata to READ_PNG and WRITE_PNG By: Markus Schmassmann on Tue, 06 September 2016 04:48
		Re: Crowd support wanted for adding metadata to READ_PNG and WRITE_PNG By: andrewcool777 on Mon, 26 September 2016 17:33
		Re: Crowd support wanted for adding metadata to READ_PNG and WRITE_PNG By: penteado on Wed, 07 December 2016 16:54

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