How to measure Fixed Pattern Noise[FPN] in a dark image?

Matlab code for Fixed Pattern noise removal

01 February 2019 8,882 9 View

Is it possible to estimate noise in real time image?The code give below is correct or not?

function Sigma=estimate_noise1(I) [H W]=size(I); I=double(I); % compute sum of absolute values of Laplacian M=[1 -2 1; -2 4 -2; 1 -2 1]; Sigma=sum(sum(abs(conv2(I, M)))); % scale sigma with...

31 December 2018 3,306 0 View

How to measure illumination in a dark image?

Fixed pattern noise can be measured in the absence of illumination. How to prove the absence of illumination in an image?

31 December 2018 8,682 7 View

How to measure Fixed Pattern Noise[FPN] in a dark image?

FPN is the component of pattern noise measured in the absence of illumination.

31 December 2018 6,761 3 View

Physics: Why do we describe light by referring to its wavelength, but microwaves and radar pulses by referring to their frequency?

In physics, the description of the properties of light generally refers to its wavelength (nm), while in the range of microwaves and radio waves we refer to the frequency of a signal (e.g. kHz or...

03 March 2021 1,682 3 View

Could you recommend any books about Number Theory?

Beginner level books. High level books. Analytical Number Theory. Algebraic Number Theory. Combinatorical Number Theory. Books about partitions. Books about primes.

03 March 2021 7,174 5 View

Why should we choose deep learning to machine learning? Why is CNN better for image classification? Can I get Typical Answer?

What Characteristics makes CNN work better?

03 March 2021 1,458 4 View

What kind of intervention will be relevant to increase motivation among young sport trainees?

Any suggestion on what book to read is also welcome.

03 March 2021 1,646 4 View

Can we block unwanted images during the x-ray prediction?

i am try to classify the x-ray images. During classification , can i block unwanted images (except x-ray image).

03 March 2021 7,100 1 View

Is there a classification scheme for rock cavities or caverns with respect to their size and shape?

The range of forms and sizes of cavities in rock is very big. Is there a classification scheme for rock cavities regarding their size and shape?

02 March 2021 4,511 3 View

How the parameters (such as Mw, Chemical bonds, polymer bland and so on) affect the mechanic property of polymer (such as storage, loss modulus) ?

Anyone can recommend any books on such topics? Thanks in advance.

02 March 2021 8,457 2 View

No title

02 March 2021 932 1 View

Is there any effect of different colours of light (white, red, yellow, blue etc.) on the rate of photosynthesis? If yes, why?

Light is inevitable for the process of photosynthesis reaction. Naturally sunlight plays the vital role for this process. Light may be of different colours like white, red, yellow, blue etc....

02 March 2021 7,890 2 View

APA 7th In-Text citations with two references with three authors with the same surname, but four different author?

I have an issue with APA 7th in-text citation. II have two papers where the first three authors are the same, and the fourth is different. I am using the Mendeley desktop app, and automatically it...

02 March 2021 790 3 View