PNG with No Alpha Channel?

Luis luis at anachreon.co.uk
Wed Jun 11 06:33:16 EDT 2008


What are you creating the png images with? I recall seeing different  
save options for png in The Gimp, can't recall them exactly now (I  
think you could strip out the gamma and the background from the save  
as well as setting the interlace).

Cheers,

Luis.


On 11 Jun 2008, at 09:49, Luis wrote:

> I take it exporting it as a gif and then converting back to a png  
> is a no-no...
>
> Cheers,
>
> Luis.
>
> On 10 Jun 2008, at 23:33, Trevor DeVore wrote:
>
>> On Jun 10, 2008, at 5:16 AM, Luis wrote:
>>
>>> 'pngcrush' (commandline option) can do this as well as  
>>> 'imagemagic' (also commandline).
>>>
>>> imagemagick: convert pic.png -background white -flatten +matte  
>>> pic_new.png
>>>
>>> Unless what you want to do is get it into indexed (palette) mode  
>>> and remove the alpha channel from there.
>>>
>>> png2pdf might be an option, it can take care of the alpha channel  
>>> and give you a pdf, which you can embed into a pdf
>>> (http://png2pdf.sourceforge.net)
>>
>> Thanks for the links Luis. I'm aware of the other tools out there  
>> that can do this but I'm hoping to not have to include another  
>> image library on Mac and Windows just to strip alpha channels from  
>> PNG files which is why I was hoping someone knew how to do it with  
>> Revolution.
>>
>> -- 
>> Trevor DeVore
>> Blue Mango Learning Systems
>> ScreenSteps: http://www.screensteps.com
>> Developer Resources: http://revolution.bluemangolearning.com
>>
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