On 04/06/14 01:58, Paul Emsley wrote:
On 02/06/14 21:32, George Devaniranjan wrote:
Hi COOT users,
I was looking at the COOT tutorial and saw the following explanation:
/*"It can be educational (even useful at lower resolutions) to
sharpen or blur a map. This can be achieved with the sharpening tool
Calculate -> Map Sharpening.... By default, the maximum and minimum
sharpness is +/- 30Å^2, this can be changed (in this case to 80)
using:*/
/*
*/
/*(set-map-sharpening-scale-limit 80)"
*/
On COOT, I see it now goes to +/-200, meaning the current minimum and
maximum sharpness is +/-75Å^2
??
In the COOT mail archives I found the following reply by Paul Emsley:
*/It scales all amplitudes (whichever you chose when you read in the
mtz file) by the application of a negative (or positive) B-factor. So
the scale factor is a function of resolution and nothing more (at the
moment)./*
*/Paul./*
So just to clarify, the sharpen/blur sliding ruler scales ALL
original B-factor's by an identical value and the it ranges from +/-75??
I think your confusion is due to the out-of-date documentation.
For me, the sliders go to + and - 200... which is the range of B
sharpness available - by default.
The sharpness of a map can be adjusted with reference to a model.
Oh dear - that's not right.
I meant to type say that sharpness of a map is adjusted without
reference to a model :-/
Paul.
