Change resolution based on dpi in flex

Hi All ,
In my Flex Application , i am getting image for chart / process from java. Its working fine.
Now my new requirement is :
1) For the first time when getting image the default dpi should be : 72dpi
2) And i should have 2 more options to select 90dpi and 150dpi in flex
and when selecting these dpis , my chart/process resolution should change based on selected dpi in Flex.
Please helpp.....

SkR Pasha,
If I understand what you mean, there are two approaches you can take:
1) The easiest way is to just define 3 paths to images, each one being a different resolution:
var img1:String = lowResImage.gif;
var img2:String = medResImage.gif;
var img3:String = highResImage.gif;
Then load the one that is appropriate when the DPI changes.
2) Flex 4.5 includes support for multiple DPIs. First you get the current DPI:
FlexGlobals.topLevelApplication.applicationDP
Then you use the MultiDPIBitmapSource class to specify which image to use based on the DPI.
Here's an example that you can apply to a standard application (you don't need to write a mobile app to do it):
http://help.adobe.com/en_US/flex/mobileapps/WS19f279b149e7481c682e5a9412cf5976c17-8000.htm l
hth,
matt horn
flex docs

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Hi, Bearcat Annie. There are two problems here: 1) iPhoto 4.0.3 and earlier versions don't offer any direct way to change the dpi specification of an image, and 2) the teacher's dpi requirement has no meaning unless it's accompanied by an overall resolution limit, such as 640 x 480 pixels, 1024 x 768 pixels, etc. Has the teacher specified an upper resolution limit?

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First, DPI (dots per inch) is different to PPI (pixels per inch) despite the terms very often being wrongly interchanged. Photoshop works with pixels, not printer output dots.
http://www.google.com/search?q=dpi+v+ppi
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Hi,
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Happy Holidays
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Change resolution of image

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I only choose 300ppi as that is the value you choose in the original post. The smaller the image is when being printed the higher the ppi is
if you do not have resampled checked. Resampling allows photoshop to alter the actual pixels of the image.
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I do not want to use up more memory than necessary on my laptop. I also want to have the best quality image.
One more question: When scanning images myself, on my own scanner, for my Keynote presentations, would I be better off scanning them as JPEGs or TIFFs? I have been told that a TIFF is better because it is less compressed.
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