Gamma questions pertain to non-linear responses in the display chain. The application, adjustment or compensation for gamma, as well as the consequences of doing or not doing so are common subjects.
Questions tagged [gamma]
164 questions
0
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1 answer
clarifying gamma topic (in general)
I understand gamma topic but maybe not 100% and
want to ask somebody to answer and clarify my
doubts.
As I understand
there is a natural linear color space where color
with value 100 is exactly four times brighter then color
with value 25 and so…
grunge fightr
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0
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0 answers
Adding Gamma noise to an image without using imnoise function in matlab?
I have added 6 different type of noise to an image without using imnoise but still there is one type that i couldn't find anywhere, The Gamma noise!!!
how could i add Gamma noise to an image without imnoise??
If you had the answer of the first…
Rman Edv
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1 answer
What to do if tgamma() function is not defined?
I am trying to use tgamma() from the standard library. When I try to compile, I get the error message:
Call to undefined function tgamma
I have the directive #include . I use Embarcadero C++ Builder XE3, which claims to support C++11…
user2300944
- 77
- 9
0
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1 answer
GL_FRAMEBUFFER_SRGB_EXT banding problems (gamma correction)
Consider the following code. imageDataf is a float*. In fact, as the code shows it consist of float4 values created by a ray tracer. Of course, the color values are in linear space and I need them gamma corrected for output on screen.
So what I can…
apartridge
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-1
votes
2 answers
How to do Gamma Distribution in Python?
So when using excel there is a function for gamma distribution function over there, I'm doing =GAMMADIST(B2,$K$2,$K$3, TRUE) which is nothing but GAMMADIST(x, alpha, beta, cumulative), here B2 is nothing but my first value of data, K2 and K3 are my…
Akilesh
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-1
votes
1 answer
How do I stop my Printscreen screengrabs from being washed out?
I am using a PowerShell command to screengrab a window by using a bat file as follows:
powershell -c "Add-Type -AssemblyName System.Windows.Forms; [System.Windows.Forms.SendKeys]::SendWait('%%{PRTSC}')"
However, the resulting image is washed out as…
Graham3D
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-1
votes
1 answer
Unable to publish Super set dashboard
I have a VM where super set is installed able to create the dashboard and when dashboard is published
and when clicked on share dashboard getting a link as shown http://localhost:8088/r/8
but to access the published dashboard from VM named…
dhana lakshmi
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-1
votes
1 answer
Matlab Error: Index in Position 1 exceeds array bounds
I am attempting to create a gamma distribution in MATLAB; however, I keep receiving the error:
Index in Position 1 exceeds array bounds (must not exceed 100).
Assuming I am reading this correctly, it is referring to variable M that is simply =…
TryingToMath
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votes
2 answers
Invert gamma correction in python
I would like to use
import cv2
def adjust_gamma(image, gamma=1.0):
# build a lookup table mapping the pixel values [0, 255] to
# their adjusted gamma values
invGamma = 1.0 / gamma
table = np.array([((i / 255.0) ** invGamma) * 255
…
gen2
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-1
votes
1 answer
Texture taken from Item: can I make its filtering be gamma-correct?
If this was a texture that I created, I'd simply make its internalFormat be GL_SRGB. But I'm passing a Qt Quick Item foo into my custom QQuickFramebufferObject GL code, where I take foo->textureProvider()->texture() and use that texture to…
Stefan Monov
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votes
2 answers
gamma distribution in R
I would like to plot a gamma distribution in R where the scale paramter (alpha) stays the same but the convolution paramter changes (all in 1 graph).
I know dgamma but don't really know what the x argument means. I would like to just draw the…
user3069326
- 575
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- 10
-1
votes
1 answer
order of parameter for stat functions
I have the following code to estimate the parameters of gamma distribution, generate some reall data with estimated parameters and do kstest:
alhpa, beta, loc=gamma.fit(my_data)
real_data=gamma.pdf(my_data, alpha,loc,beta)
stat, pval = kstest…
Amir
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-2
votes
1 answer
Histogram on R studio
I am trying to create a histogram of a variable with superimposed the lines of the 2 gammas distribution and the mixture of those two.
But when I insert the following code:
hist(age, breaks = 50,freq = FALSE)
…
LJS
- 11
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-3
votes
1 answer
Creating a Noisy Image and Removing Noise Using randg Gamma Law in Matlab?
I want to add Multiplicative Gamma Noise to a image using "randg" function in Matlab and remove that noise. We have to keep in mind that the noise should have mean 1 and level 4. It should follow Gamma law ( with Gamma Probability Distribution…
unique_CODER
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