lightroom – Where does this noise come from and how to get rid of it?

I'm using Darktable as my RAW processing software. In the darker images that have been taken with an ISO of 800 or more, I often find big problems with luminance noise.

The next two images (one of clouds and one of pure sky) are cuts from a recent photo I took. Clearly there is some noise, especially in the second image.
Raw clouds
Sky Raw

After making some standard editions, such as changing the exposure and adding contrast, the noise becomes more noticeable as you can see in the next two images. Here, the color reduction was already applied, but nothing for the luminance.
Clouds in Darktable (without denoise)
Sky in Darktable (without denoise)

And finally, this is what the Darktable noise elimination filter does of this. There are heavy artifacts that are possibly worse than the original noise.
Clouds in Darktable (denoised)
Sky in Darktable (denoised)

Those devices have a look similar to that of a phone camera when you take an image too dark, so I guess it's not a completely dark problem that I'm here with.

When I tried to replicate something similar in Adobe Lightroom, the noise elimination was much better (see the next two images). Apparently, it is possible to implement a better noise elimination procedure in theory.
Clouds in Lightroom
Sky in lightroom

I wonder, is there a step that I'm missing in my editing workflow that makes these artifacts are there or is it just an incorrect algorithm that Darktable uses and there's nothing I can do to improve the image?

HUAWEI P20 LITE -ANE- LX2J. I can not get rid of this configuration process

I tried different shortcuts using the default Launcher when switching from one side to another, for easier access to some string files.
"Please keep in mind that my phone has been configured correctly for months and works very well"
At that time I also had the Play Store application called "Shortcut Creator" open in the background, so I'm not sure which hidden direct access I activated in particular … but now I can not get rid of it. I've deleted the cache of the Android package, I've even let it run for a reasonable period of time, many times to see what would happen and guessed it … it just stays there in the notifications.

tl; dr
Basically, I agreed to something I do not know and I can not get rid of this notification or the windows that follow, I touch them. images..

Sorry, guys, they do not let me upload screenshots of photos, so here they go, please take a look.

After kicking it, this happens, but the phone is fully functional and the restart does everything except make money.

Device Information

hardware – Do video cards store personal information? Should they be destroyed by getting rid of them?

I realize that this question sounds a bit ridiculous, but I realized that I really could not ask any questions. I'm in the process of getting rid of some of my old computers, and I know I need to destroy the hard drives.

With this in mind, I also need to get rid of an AMD Radeon graphics card that came with a Dell PC that I bought in 2012. It's pretty big and the thought crossed my mind. Could this also contain part of my personal information? Do I need to destroy this along with my old hard drives?

Looking for replacement to get rid of GoDaddy

Hello!

A quick history of my situation: my name is Ellie and I used to have a blog of 10,000 to 15,000 visits / month in which various beauty products were reviewed. I started with eHost in April 2016. Some time later, they finished and moved all their clients to JustHost. Let me tell you that the first year with them was C H E A P. The second year was the most expensive thing I bought. It was about 200 euros a year! Yes, it was not written anywhere that it would be so high or that I even bought the premium hosting (absolutely useless hosting, my blog was only starting with a maximum of 100 visits). In 2018, I wanted to transfer to GoDaddy. So I bought the domain transfer and 10 years Cheap accommodation in linux. But JustHost claimed that they were not the registrars of my domain, eHost claimed that it was JustHost, JustHost claimed that it was DomainRegistry that did not even offer that.

Blah, blah, blah, for short, I lost my domain name of 15 K and I had to buy a new one.
Therefore, with a new domain that nobody knows and everything, I was fine during the first half of the year with the cheap accommodation until I got more than 5 to 10 people on the site at the same time. Well, now I'm stuck with 9 more years of prepaid hosting, I'm not willing to pay for an update for the next 9 years (if only the Deluxe gave me something useful and not just several domains in the same time). accommodation ass).

So I need to find a new hosting provider, for the same money that I currently have the hosting, I found Cloud Hosting on ResellerClub what already seems much better (2GB of RAM instead of the 512MB of laughter). Is that a good option or is there another? I do not want a VPS hosting because I need a cPanel. Also, my website is based on WordPress.

The second question: can I somehow sell my full GoDaddy account? I know that the accommodation itself is locked in the account, but I do not want the account either, so I'd like to get rid of it.

Thanks for the answers and help

Lighting: How to get rid of the brightest dark areas of the object when taking a photo or editing it later?

It's costing me a bit to take pictures of my drawings in pencil. I recently published a question about noise and blur.

The point is that my art looks much better on paper, but when I take pictures, I see the following problems:

  1. Loses contrast
  2. Dark tones become less bright (which should not be)

See the photo taken here:

enter the description of the image here
The darkness of the stain marked by Green Line It is very close to my real drawing, but the same darkness becomes brighter in many other places (marked by red). And some white spots. (imperfections in the drawing), which are less visible in the real drawing, is highlighted more here (see yellow circle).

One possible reason may be that there is too much light. (I'm not sure, I attach a picture of the lights in my room below) which is causing the brightness or some camera settings is wrong.

And if the light in the room diminishes, the dark spots become less bright and better, but the photo in general becomes darker. What is bad again.

Here is the information of the photo:

enter the description of the image here

Here is another picture., using the natural light of the window, in which the left part is better but the right part becomes brighter.

enter the description of the image here

Here is the picture of 2 lights in my room. I placed the illustration (size A3) on the mirror that is in the center of the image.

My camera is Nikon B500 point and shoot camera.

So, the small sensor is the reason for it? Or is the light too much or less?

And if I want to reduce these problems (the brightest points, one side is better, the other is brighter) using Photoshop, is it possible to do it?

enter the description of the image here

Lighting: How to get rid of the brightest dark areas of the object while taking a picture from a camera point and shoot?

It's costing me a bit to take pictures of my drawings in pencil. I recently published a question about noise and blur.

The point is that my art looks much better on paper, but when I take pictures, I see the following problems:

  1. Loses contrast
  2. Dark tones become less bright (which should not be)

See the photo taken here:

enter the description of the image here
The darkness of the stain marked by Green Line It is very close to my real drawing, but the same darkness becomes brighter in many other places (marked by red). And some white spots. (imperfections in the drawing), which are less visible in the real drawing, is highlighted more here (see yellow circle).

One possible reason may be that there is too much light. (I'm not sure, I attach a picture of the lights in my room below) which is causing the brightness or some camera settings is wrong.

And if the light in the room diminishes, the dark spots become less bright and better, but the photo in general becomes darker. What is bad again.

Here is the information of the photo:

enter the description of the image here

Here is the picture of 2 lights in my room. I placed the illustration (size A3) on the mirror that is in the center of the image.

My camera is Nikon B500 point and shoot camera.

So, the small sensor is the reason for it? Or is the light too much or less?

enter the description of the image here

[ Politics ] Open question: I am a color democrat and I believe that affirmative action is flawed and it is time to get rid of it.

I think it's time to abolish it. What you think? .

lens – Why is the fungus formed on the lenses and how to get rid of it?

For all the following: YMMV *, caveat emptor, no responsibility is assumed for the advice given, you decide if you try at home. It can even work :-). Note that the damage may already be fatal and / or that fatal damage (to the lens) may occur along the way. The best attitude is to consider the lens as a punishment now, and anything you can get from it through the following methods is an advantage.

The fungus in a lens will be forever degrade the image but The amount of degradation can be invisible to mere mortals or can make the lens completely unusable by any standard. Often, even a very significant lens defect visually, such as a chip or a scratch, will not be instantly obvious in the final images for a casual observer. Experts will usually be able to detect almost any defect (or say they can – mere mortals will not be able to tell if they are correct :-)). In addition, the configuration of the lens will affect how much a given defect affects a particular image.

In some cases, the advice given in 1a and 1b below will transform the results from generally unacceptable to generally acceptable. In other cases they will not. Just trying will tell you how good a method will be.

The best advice (but too late :-() is to never let it happen.The fungus only grows in damp conditions.Keep your lenses in a dry and well-ventilated place with desiccant sachets.

If it is inside the lens, there are two options (apart from the deletion). Unfortunately, although either of them can work, none works well.

  • 1 (a) The brightness of UV (ultraviolet) light in the lens over a prolonged period will "discourage" the fungus, how well and how long it is uncertain. The simple act of leaving a lens with the iris completely open on a window ledge facing the sun in a dry place for weeks or months can produce good results. Plug the lens on the back and tilt it so that the sun shines on the lens during the sunniest parts of each day. (Note that the sun shines directly along or near the lens axis may Focus the light on the end cap and melt it; it's unlikely, but check the point and the degree of focus.) I tried this procedure with an extremely old Minolta 50mm f1: 1.4. Manual lens and achieve tolerable results. I simply left the lens as indicated above for many months and, when I looked again, I discovered that the presence of mold had been substantially reduced.

    1 (b) the light of a germicidal A UV lamp (short wavelength) can be used instead of sunlight. This type of light can blind or damage your eyes permanently if observed for prolonged periods and can cause "eye bow", a painful but usually temporary eye inflammation. This does not mean that you should not use such lights at all, simply that they should be used with due respect. These lights are available from many sources for many purposes and can have a very low cost.

    Note that UV light "black light" is not suitable for this purpose. It is longer wavelength and is not very active biologically.

    Also note that short-wavelength high-energy UV light (which is the reason you are using it) of germicidal UV lamps will also degrade other materials, such as some plastics and other miscellaneous materials, including, possibly, parts of a plastic lens housing. This depends on the material, the distance, the light energy and the exposure time. YMMV, but keep in mind the emptor, that is, know that you are using a tool with sharp blades and without protection (although you can not see them) and use it with due caution.

    All of the above can take some people away from germicidal UV lamps. If so, that's good. They are an excellent and useful tool, but they are not suitable for the use of careless or unthinking people.

  • 2. Disassemble and clean. If the lens is so degraded that it can not be used and if the above method does not work well enough, the lens must be dismantled. If the lens is otherwise a "cancellation" and you are mechanically competent, you can try it yourself. Reassembly of a lens capsule is considered an expert task and realignment in reassembly may require arcane knowledge. They are still in business and they cost money to use.

    The fungus often attacks the surface coatings of the lens and can etch the glass itself, so the lens can be degraded significantly or fatally. How much is the tbd of May / May / May applied in your case. A little lens cleaning works very well indeed. An amateur and a good MTR test will probably tell you something has happened, but the results can be very tolerable in practice.

    You will find articles on the internet about lens cleaning methods. I read an article by Zeiss or Leitz that suggested that cigarette ash is an excellent fine cleaning compound (!!!).



Added: member 19602 made this comment, since it is gone and comments can also add it to my response.

On April 7, 2013, once member 19602 said:

  • I can tell you with absolute certainty that Leitz's recommendation is not a sealed container with desiccant but an area with constant air circulation. I used to be with Leitz Germany.

[ Politics ] Open question: When AOC said that we need to get rid of the cows within 10 years or the world is doomed, was she suggesting a mass extermination?

[ Politics ] Open question: When AOC said that we need to get rid of the cows within 10 years or the world is doomed, was she suggesting a mass extermination? .

How do I get rid of the sliding feature in the mobile for the pages of a single WooCommerce product?

On mobile devices, is there any way to eliminate the function that allows you to slide your finger to scroll through the product images? I just want users to be able to touch the thumbnails and show the main image.