How to Avoid Digital Noise

You have your new camera and everything goes very well, until you start taking pictures in low light situations and you realize that a spice of granularity appears in the image that causes it to lose sharpness. That grain is digital noise.

What is digital noise

Noise is the headache of the digital age. There are different types of noise, but the most common are the luminance noise, caused by the lack of light, and the color noise, caused by the heating of the sensor which is best flight time drone .

A pixel is a color dot, and a set of pixels form an image. The noise appears when the color and light of some of those pixels are altered and that spoils them. If we enlarge a photograph to see it in more detail, we can see the altered pixels, especially in the darker areas.

How we can combat digital noise

We started with the first type of noise we mentioned, the noise of luminance.The first thing we have to take into account is the size of the camera sensor. Here’s why:

  • The sensor is formed by a surface of cells that react to contact with the light entering through the optics of the camera.
  • Each cell has light detectors, called photodiodes, which are responsible for converting light into electrical signal.
  • And that electrical signal becomes an image that is stored in the memory of the camera.

The problem is less frequent if the sensor of the camera is larger, because it has more capacity to capture the light and so you do not have to “invent” so much data. In addition, the pixels have more space to each other, and the higher the pixel density, the higher the likelihood of noise.

We have already spoken in other vlogs of the different types of sensors, from the medium format to the tiny sensors of some compact.The second thing that you have to take into account to have no noise in the image is the use of low ISOS, as long as the image is well exposed. The more we raise the ISO value, the more we amplify the signal and the more noise we will have.

Before raising the ISO you can adjust the aperture of the diaphragm.

In photography we have more margin and we can use the shutter speed and the diaphragm at the same time. But in video, the shutter speed is limited to 1/30, once we have reached the minimum speed we can resort to opening the diaphragm before resorting to ISO. You can also find a place where you can take advantage of natural light or, if you have artificial light, regulate the intensity.

Depending on the objective you can get more or less opening. We recommend those that allow you more. Today, for example, we recorded with a 16-28 mm Tokina that lets us open the diaphragm up to 3 in all its extension.The third tip is to avoid the dark areas in the picture. The sensor captures much better areas of light than shadows, so noise appears more easily in dark areas. If we avoid underexposing, the better. The noise produced by underexposure is more difficult to correct than the noise produced by raising the ISO.

It is best that you shoot in RAW if the camera allows. Being an uncompressed format, you’ll have more room to manipulate it in post production and retouch lights and shadows.There are cameras that have a noise reduction function, and also softwares like Photoshop or Premiere that have plugins with which it is possible to reduce the noise in post production, such as the denoiser effect of Premiere Color Suite and the Noise reduction in Photoshop. Although the truth is that they are not very recommendable, since this type of systems apply filters that impair in the quality of the image.

(Note: And they also require a lot of computer resources and at the time of rendering are slow and impractical processes. To give you an idea, once I applied the effect of reducing noise in a video of 50 minutes and it took me about 24 hours in Export, when normal would be about 40 minutes, depending on the power of the computer. It is best to prevent noise in the raw image).

As for the other type of noise that we have mentioned, the color noise, is caused by overheating of the sensor that normally occurs in prolonged exposures such as night photography. In this case what we have to do to avoid it is to wait between photography and photography so that the sensor does not get so hot. Or, as we have said, use the noise reduction tool that allows the camera.Well, we have given you a few tips to avoid noise, but you can also use it in aesthetic or artistic way.Do you have any other trick to avoid noise? Tell us your secrets, or anything else you want to tell us;)


How to Create Content for Your blog Easily

In order for your blog to be successful and you can increase visits, you must regularly post good content. But this is not always an easy task. Here I give you some ideas so you can create good content more easily … if you are tired, “blocked ideas” or do not have much time.Sometimes, bloggers can also have the famous “writer’s block”. It just happened to me this Friday when I had to release an article. I spent several hours thinking about interesting topics, and advanced several subjects, but without completing any with complete satisfaction. In my case (and I have read that is the best) I prefer not to throw anything to throw something of mediocre quality. This situation served as an inspiration for this article, to help them (and help me) when they have a “writer’s block”.

How to Create Content for Your blog Easily

Ask other bloggers for permission to copy some of their articles
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Of course, clearly mentioning the beginning of the copy, the name of the blog or author. In 80% of cases you will be authorized (in my case, I do). But be careful at least to choose good quality blogs. It just happened that I was going to copy an article that I found interesting, but when I read it in depth, it was not very clear, and to top it off it turned out to be a copy of Wikipedia! However, copying good articles can help us share these contents with our readers, without leaving them blank when we are “blocked”, we do not have time or are on vacation. There are so many articles on the web that your readers will not necessarily find them, unless you put them on your blog. But that yes, remember that what is worth more in a blog is originality. So keep your blog 95% with original content, that is, of your own creation. Ask other bloggers for permission to copy some of your articles.or you have another option copy someone else article and rewrite article and share on social media to use this tool Click this link to rewrite content

Translate articles from other languages.

Unfortunately in Spanish there are not enough good articles that you can find in English (or in French). So if you translate articles from English, you can allow your readers to know articles they suddenly would never find, or understand. Of course, you should also mention the author’s blog name and specify that it is a translation.

Update your old articles.

You can use your old items as a base for new ones. Suddenly there are some things to add, things that you forgot to write before. Suddenly there are news or modifications on the subject. This will allow your faithful readers to review the topic or update. And using keywords different from those of the first article, you will allow new readers, get to your blog and get to know you.

Make an article from comments on your blog or other blogs.

One of the “greatness” of a blog is in the comments. These enrich the articles of a blog. Although commenting on blogs in Spanish is not yet very expanded (you will find, on the other hand, many comments on blogs in English), when you get several comments from an article on your blog you can think of it as a source of information for another article. And if your blog still does not capture many comments, you can go to the most read blogs in Spanish. The comments of your readers may have enriched both the initial theme, which gives for an interesting article. Obviously you will not copy the comments to the letter. Comments are simply a source of information about what the market thinks, about reality, suddenly about examples, and they will serve as the basis for an article in which you put your own views on the subject.

Make an article from conversations in social networks.

The same thing you can do with the conversations in social networks, that is to say, with the interactions that exist between the netizens around a subject. For example, a Facebook post can lead to 20 reactions with interesting and enriching comments. Even better, a discussion in Linked In may have 30 or 50 comments that answer an interesting question, such as “When do you use Twitter?” Or “What Facebook strategies do you use?”. The forums also give you incredible information with which you could write thousands of articles. For example a travel agency or a tourism company can use as information base travel forums , beauty, maternity or couple, can serve you if you have a blog that talks about these topics.