Zobrazení zdroje stránky PixInsght Poznnamky


=== PIXELMATH ===

[https://rikutalvio.blogspot.com/2023/02/pixinsight-cuda.html  GPU acceleration]

Stretch
<pre>

sin(max(0,ln(($T+(1/(exp(stretch)-1)))*(1-exp(-stretch)))/stretch+1)*pi()/2)^contrast
stretch=9; 
contrast=1.5


sin(max(0,ln(($T+(1/(e^stretch-1)))*(1-e^(-stretch)))/stretch+1)*pi()/2)^contrast




sin(max(0,(log($T)+stretch)/stretch)*pi()/2)^2
stretch=4.1

sin((ln($T)/stretch+1)*pi()/2)
stretch=8.25
</pre>



Huble palet


* [https://www.youtube.com/watch?v=_6in5Kvo95s&t=10s Normalized Narrowband Version-5 for Pixinsight Pixelmath]

<pre>
R
((O*H)^~(O*H))*H+~((O*H)^~(O*H))*O

G 
(O^~O)*S + ~(O^~O)*H

B
O
</pre>


<pre>
R/K: (0.5*S)+(0.5*H)
G: (0.2*H)+(0.8*O)
B: O
</pre>

=== SSWEIGHT ===


<pre>
(35*(1-(FWHM-3.008)/(4.003-3.008)) + 5*(1-(Eccentricity-0.3663)/(0.5712-0.3663)) + 10*(1-(Noise-107.6)/(117.5-107.6)))+50

FWHM<2.5 && Eccentricity < 0.8

FWHM<2.5 &&  EccentricitySigma < 2


10 + 2 *(FWHMSigma / -3) + (EccentricitySigma / -3) + (SNRWeightSigma /3)

2* (FWHMSigma / -3) + (SNRWeightSigma /3)


SNRWeight




ASI294
3.9999

2350	0.4064
1550	0.6161
750	1.2733
524     1.8225
500	1.9100
300	3.1834
135	7.0741
85	11.2354
50	19.1001



ASI1600 
4.9600

2350	0.3335
1550	0.5057
750	1.0451
524     1.4958
500	1.5676
300	2,6127
135	5.8060
85	9.2213
50	15.6761




</pre>)