On Sep 7, 2005, at 10:21 PM, [EMAIL PROTECTED] wrote:
One of these days you are going to define it so I understand it?
Exactly what
is a blown highlight?
Here are some ways to define and understand the term:
- A "blown highlight" is a highlight area where you wanted *some*
detail (like the subtle texture of a white shirt) but there is none:
it's basically blank white in the image.
- In Zone System parlance, a blown highlight would be a Zone IX
exposure that missed and overexposed by about a stop.
- In 8bit grayscale parlance, all pixel values in an image range
between 0 and 255. A blown highlight is any area where you wanted to
render some detail that has an average pixel value over 220. (I set
Zone IX areas to have pixel values between 185 and 220.)
Hope that helps. :-)
Godfrey
