Re: Shrinking a picture --- and it becomes blur !!

Duddits wrote:
> On Mon, 28 Apr 2008 23:39:48 -0700 (PDT), hsyq8xg@[EMAIL PROTECTED]
 wrote:
>> snip 
>>
>> Now my questions to all you Gurus as below ---
>>
>> 1.		Can you tell me of the best way to shrink a 8192X6144 size graphic
>> to
>> 		1024X768 size graphic without losing the interesting details?

Render the image to the size you want it in the first place. Then choose 
your JPEG compression parameters and chroma subsampling carefully and 
wisely to get the best size vs quality tradeoff. Several packages allow 
you to see the size and preview artefacts against the original.

Before any meaningful answer about downsampling is possible you are 
going to have to answer the question "what do I mean by an interesting 
detail".
>>
>> 2.		Which software do you recommend to carry out the shrinking
>> operation?
>>
>> Thank you all in advance !!!
> 
> IrfanView gives you a choice of 5 filters when resizing. Try each of
these
> until you get the desired results.
> http://www.irfanview.com

Downsampling by a factor of 8 in each linear dimension will necessarily 
have a pretty severe effect on the maximum spatial frequency of the 
original image that can be retained. There is no free lunch.

Regards,
Martin Brown
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