discuss: flowcharts
Subject:
Re: Flowcharts
From:
Jaqui Greenlees ####@####.####
Date:
10 Apr 2005 14:49:18 -0000
Message-Id: <42593D56.6030607@telus.net>
Alex Nordstrom wrote:
> On Sun, 10 Apr 2005 07:29, Jaqui Greenlees wrote:
>
>>the alternative method to reduce file size is reduce dpi levels.
>>an image of 120 by 90 at 120 dpi is larger than 120 by 90 at 72 dpi.
>>
>>quality reduction doing this, but for web graphics the trade is
>>quality for download speed / file size. ( as you know )
>
>
> DPI is only a derived measurement expressing the pixel size divided by
> the print size. It has no direct relevance to raster images displayed
> on the screen.
>
> An image 100 pixels wide printed at 100 DPI will be one inch (2.54 cm)
> wide. An image 100 pixels wide printed at 72 DPI will be
> 100/72=1.39" (3.53 cm) wide. Regardless, 100 pixels will always require
> the same amount of memory.
>
> In other words, if you are setting the image size in terms of pixels
> (dots), then the number of dots (pixels) per inch only matters if you
> intend for the image to have a specific physical size.
>
check these out, they disagree with you.
http://www3.telus.net/jaqui/images/Splashscreen_Beta_w_Sun_Logo_100dpi.png
http://www3.telus.net/jaqui/images/Splashscreen_Beta_w_Sun_Logo_72dpi.png
while the 100 dpi is larger in real size for display, as you point out,
it is also larger with file size.
which supports my comment on dpi affecting file size.
Jaqui
