Hdr images. Everything you ever wanted to know about dynamic range. What is HDR

On the left is a photo with a lot of contrast between lights and shadows. To do this, you need a camera that allows you to manual setting... If, in addition, it has a bracketing mode, it is much better as it automatically triggers 3 photos with different exposures without having to adjust the 3's parameters yourself.

We will also need a tripod or some sort of support point as we are going to shoot different photos that will be blended later. Although the most modern software automatically aligns them, keeping small differences between them, using a tripod, you will have confidence that the photo will be edited without any problems and, moreover, you will not lose the edges of the frame due to the alignment.

However, the more photos you take, the more you can cover. You just need to go to the camera and, as always, practice and experiment with different results. However, of course, there are many users who have not quite understood what it is and what results can be achieved with this option.

Before continuing, we must point out that we are not talking about something new, but about a technique that has long been used in the world of photography. Traditionally, this method has been based on the superposition of several negatives so that images are obtained with great clarity.

The name for dynamic range is due to the fact that the resulting image changes the amount of light it shows between the lightest and darkest areas. What the camera of our smartphone does to achieve this effect is to shoot several times with different lights in order to subsequently combine them into one result without saturating the light parts and not highlighting the dark areas.

Until smartphones appeared with built-in cameras and powerful processors... Perhaps in this case, the result is a bit surreal, as in the image above. The important thing to use this mode is light and that it has very different intensities throughout the scene. The best situations for getting good results are.

Landscapes with lights and shadows Sunsets Portraits against light. ... In the next image, we have a shadowed street and a very bright sky.





This will be of no use in images that are hue-dominated and provide uniform luminance. In scenes with motion, the results are even worse, because if something moves, the image will be blurry.

Luminosity or uniform tone Vivid colors Scenes with movement. ... But every time there is a trend towards standardization of the mode and nowadays in almost all camera applications, you will find it right on the screen with automatic mode.


There are also many apps that have this mode and can bring different results to the default app your smartphone has.

The human eye has a much greater ability to distinguish tones from most cameras. Our eyes are incredibly flexible: they can adapt to see the details of shadows and highlights in the same scene. Likewise, your camera is not flexible. On a sunny day, you can see through the window while still seeing the interior of the room you are sitting in. If you try to make an image that matches what your eyes see, it will either highlight the white sky or crush the details inside the room to black.

Dynamic range is a measure of the ability of a photographic sensor to record a variety of tones, from black to white. AND digital cameras gain dynamic and correct range. However, each camera is limited by the qualities of its sensor. Several images of the same scene are combined, each opening slightly differently to expand the dynamic range of the camera. For example, highlight details are taken from an exhibit or plaque, while shadow details are taken from another.

If done incorrectly, the resulting images can appear very unnatural, which is why some photographers discard the whole hand process. If you approach her with care and attention, you can create stunning images of scenes that would be impossible to capture without her.

This is a great technique if you are shooting landscape images in dynamic lighting conditions, but if you are trying to create a portrait in a studio it will not be very useful. To do this, he must be able to assess the tonal range of the scene he is trying to capture. You need to consider how dark the shadows are, how bright the highlights are, how you want them to appear in the final image, and if your camera can capture them to your satisfaction.

Diana Eftayha reviewed the analysis of the tonal range of the scene and the method of preliminary visualization of the resulting images. You take a couple of photos of the same scene, varying the exposure of each one. If the dynamic range of the scene is more than three images, you can use five, seven, or even more.

While it can be calculated, the exposure changes on its own, it's much easier to let your camera, outer spacing, or even your smartphone do it for you. This means you don't have to touch the camera when taking pictures, which avoids image blur and keeps your images sharp.

The exact process for combining different images depends on the program you are using, although for the most part it is completely automated. The software you will be using will take areas in more detail from your frames and combine them into a composite image. You can control how realistic or surreal you want the final image to be. After you combine different plates into one image, you can edit it just like with any other photograph.

The software you want to use is up to you. Capturing the images you want is usually done by changing the shutter speed between each shot. Any number of images can be combined with each other to create the final photograph, but three are the most common.

Be the first to know about new translations. Have you ever wondered why this incredible landscape is not depicted in a similar way in the photograph? What happens when you press a button to capture an image with your camera? Cameras alone cannot get such bumpy results.

Our eyes are the best cameras

There is no optical kit in the world that compares to our eyes. At least that's not something you can go up and down when recording your environment with a camera, for example. This means that whatever machine you use will not be able to accurately determine what your eyes are seeing.

Our optical assembly has the ability to practically compensate for the differences in brightness that exist in environment, which allows you to create a special "fit" for each point of view. Notice how each area has its own lighting settings.

The camera can't do it, no matter how advanced. When the sensor is capturing an image, these differences between light and shadow are not compensated for correctly, as it is possible to set the camera settings to only one point in the entire scene. This makes the image "dark", "medium" or "clear" when landscapes real life these three attributes almost always combine. Our eyes see it, but the camera doesn't. So what can you do to get a picture that comes close to reality?

That is, it is better to represent both darker and lighter areas by creating multiple specified points in one photo. Shadows and highlights are balanced and the result is more real. When you adjust image levels, you do something like this, as this setting allows you to adjust isolated areas of the image. However, doing this with a single image may not produce perfect results.

In the 1940s, a photographer thought about using multiple images at different exposures to create a single photograph with a huge dynamic range. In this way, you can create suitable dots for each area, depending on the brightness, and get impressive results and much more similar to reality.

There are programs that simulate this effect with photography only, but the results are inaccurate and often exaggerated and outdated. Record and collect these items: a manual exposure camera, a tripod or fixed mount, a landscape with large changes in brightness, and a suitable image editor.

Do you know what this feature is, what it is for, and what is the ideal time to use it? Well, let's find out everything in the next few lines. Technically speaking, this means the amount of light of varying intensities that can be recorded by a camera lens.

From there software smartphone cameras combine these photos into one, resulting in a final image that gains details that would be lost in low light conditions. Then, when activated, it will do all the work by automatically adjusting the exposure of the images. That is, you just have to click on the photo, and the result will be what should be more like what your eyes see and the less what the camera sees.

So, here are some tips on when you should use this feature to capture your images. Typically, large landscapes have large contrasts between sky and ground, for example, making it difficult for the camera to combine all the details in the same image.