I need to measure the area in a JPEG

My JPEG is 600 x 600 dpi.
It includes a ruler and a cross section of a part, The background is black. The surface I am concered with border on the black background; it is the "white" outline of the part. I need to find the "AREA" of this collection of "WHITE" color.Like the shell of a 2D egg.
How do I do this?
It would be great to configure the SCALE reference for the picture, drag a "SELECTION" box over the area, use a "EYE DROPPER" selection tool to click on the white of the outline, and click on "MEASURE" as in Photoshop.
It didn't work in Photoshop and I'm asking if Illustrator can calculate the area?
What steps are involved?
Is it aslo possible to measure Max Width and Max Height?
What Adobe product would work?
Thank you

cadsvc,
You may try this way (depending on version), working in points/pixels:
1) Place a copy of the image in a new document;
2) Filter/Effect>Colors>Inverse to turn the desired area black;
3) Click the border of the area with the Live/Auto Trace Tool, and Select the resulting area (with the black arrow);
4) If the area has undesired holes in it, Object>Compound Path>Release and delete the paths of the former holes;
5) See the W and H values in the Transform panel/palette;
6) See the area in the Info panel or use the free Telegraphics Pathearea filter, see below.
http://www.telegraphics.com.au/sw/
Edit: Seemingly, the Telegraphics website no longer shows it, but you can find it under Graffix Path Area here:
http://dzineblog.com/2010/09/10-popular-free-plugins-and-shareware-for-adobe-illustrator.h tml

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[svn:fx-trunk] 8531: If using an embedded font, need to measure the text with it so that if auto-sizing, the correct amount of space is allocated.

Revision: 8531
Author:   [email protected]
Date:     2009-07-13 12:25:57 -0700 (Mon, 13 Jul 2009)
Log Message:
If using an embedded font, need to measure the text with it so that if auto-sizing, the correct amount of space is allocated.
QA Notes:
Doc Notes: SDK-22205.
Reviewers: will be Gordon
Ticket Links:
    http://bugs.adobe.com/jira/browse/SDK-22205
Modified Paths:
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Revision: 8531
Author:   [email protected]
Date:     2009-07-13 12:25:57 -0700 (Mon, 13 Jul 2009)
Log Message:
If using an embedded font, need to measure the text with it so that if auto-sizing, the correct amount of space is allocated.
QA Notes:
Doc Notes: SDK-22205.
Reviewers: will be Gordon
Ticket Links:
    http://bugs.adobe.com/jira/browse/SDK-22205
Modified Paths:
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I need to measure the area in a JPEG

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