Re: Decimal precision in Photoshop's info palette
Re: Decimal precision in Photoshop's info palette
- Subject: Re: Decimal precision in Photoshop's info palette
- From: Giordano Galli <email@hidden>
- Date: Sat, 20 May 2006 10:05:55 +0200
On May 20, 2006, at 6:13 AM, Marco Ugolini wrote:
In 16-bit Lab the results are even *more* imprecise, if that makes any
sense!
If I manually enter L* 73, a* -28, b* -25 into the Color Picker in 8
bits,
after I fill the document and run the script I get {class:Lab color,
value_L:72.94, value_a:-28.0, value_b:-75.0}.
But if I enter those same value in 16-bit mode, the values that the
script
retrieves are {class:Lab color, value_L:72.94, value_a:-27.61,
value_b:-74.79}: *less* precision! What's the meaning of that?
I don't know about the Applescript, but judging from the 16-bit
readouts of the Info palette it seems to me that Photoshop's
picker is still using 8-bit precision. Testing with your colour
I get:
+73 -> 23,901 / 32,768 = 0.7294 * 255 = 186
-28 -> -3,534 + 16,384 = 12,850 / 32,768 = 0.3922 * 255 = 100
-25 -> -3,148 + 16,384 = 13,236 / 32,768 = 0.4039 * 255 = 103
giordano
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