Re: Virtual Iris Show

I'm talking about the space taken up on the file system; these are high 
quality JPEG. The images are 24 megapixels.

Ken

On 2/24/2014 9:08 PM, John Jones wrote:
> Ken,
>
> When you say your JPEGs are less that 10MB, do you mean the size of the 
> JPEG fuel or the size when the JPEG is opened and decompressed.
>
> JPEG is a "lossy" compression algorithm and the amount of compression 
> affects the quality of the resorted image. The higher the compression the 
> smaller the resulting file and the lower quality the compressed image.
>
> John
>
> On Feb 24, 2014, at 7:52 PM, Kenneth Walker <kenww@astound.net> wrote:
>
>> Hi Bob,
>>
>> A couple points of image size:
>>
>> I have a high resolution camera and JPEGs are typically less then 10MB. 
>> Did you mean 10,000KB (same as 10MB) for a max file size rather than 
>> 10,000MB? "K" vs "M" makes a big difference.
>>
>> The size of a digital image is measures in pixels of width and pixels of 
>> height. Dots per inch is a display or print resolution. If you'll excuse 
>> an analogy, it's a bit like asking for gas and telling me your car uses 3 
>> ounces per mile. I can't tell how much gas you need without knowing how 
>> far you are driving. I don't know how many pixels you'd like without 
>> knowing how big you might print the picture. This is why Photoshop puts 
>> resolution together with size in inches (or cm, etc) under the grouping of 
>> "Document Size"; when you print, you can't have one without the other.
>>
>> As a photographer it is easier for me if you decide on a range of 
>> reasonable pixels sizes.
>>      • Suppose you want all photos capable of being printed with a size of 
>> 3 inches at 300 pixels per inch. 3 inches * 300 pixels per inch = 900 
>> pixels, or 900 by 900 pixels for a square photo.
>>      • Or maybe you expect your judges to use monitors at least 1200 
>> pixels high. You might request that pictures be at least 1200 by 1200 
>> pixels.
>>      • Maybe you'd like the option to print some of the pictures across 
>> the cover of the AIS bulletin at a high resolution: 12.5 inches * 600 
>> pixels per inch = 7500 pixels (although cameras for that size image cost 
>> tens of thousands of dollars; probably excessive for this contest).
>> Perhaps it would be reasonable to have something on the How to Enter page 
>> like "Images sizes should ideally be between 1200 by 1200 pixels and 3500 
>> by 3500 pixels". Or whatever range seems good to you.
>>
>> Ken
>>
>>
>>
>>
>




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