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Samsung Log Video

1. Understanding Log Filming

Log filming is a technique used to capture video with a wide dynamic range. This means that the camera’s sensor records luminance of both very dark and very bright areas.

In standard filming, the dynamic range is compressed to fit a specific format, whereas log filming retains more image data. This preserved data allows greater flexibility during post-production, particularly in color adjustments, enabling more cinematic and visually appealing results.

The following are some of the main advantages of log filming:
1) Cost effectiveness: High-quality videos can be produced without a need for expensive high-end equipment.
2) Time efficiency: The filming process to achieve a desired look is simplified, reducing production time.
3) Flexibility in post-production: Improved options for controlling colors, shadows, highlights, color tones, and other image data.

When light passes through a lens and reaches the camera's sensor, each pixel on the sensor captures the light’s intensity at that point. This data is then digitized by the camera’s image processor.

The camera records light more precisely than the human eye perceives it. For example, if you increase the number of candles in a dark room from one to three, a camera will record that the light intensity has tripled. However, the human eye will perceive the increase as less than triple, approximately 2.5 times brighter. This difference is because our eyes perceive light on a relative scale. If the number of candles increases from two to three, it feels like an increase of one candle, which is only a 50% increase (half of two).

Cameras measure light intensity in a linear calculation, while human vision is more logarithmic. To make video footage look more like what we see with our eyes, a "gamma" correction curve is applied to the video. This curve converts the linear data to a logarithmic scale. This means that the range of darker tones (shadows) is expanded while the range of brighter tones (highlights) is compressed, making the dark areas more detailed and the bright areas less overwhelming.

As a result, a typical log footage appears flat and washed-out, because the contrast is reduced. To achieve the desired visual style for a video and enhance the colors and contrast, a pre-defined set of color adjustment values known as LUT (Look-Up-Table) is applied to the footage during post-production.

2. Filming and Color Correction in Samsung Log

1) Samsung Log

Today, we're living in an era of personal media, with platforms like Reels and Shorts enabling greater self-expression through videos. Often, content creators edit their videos to reflect their unique style rather than using the auto-corrected footage as is.

Log filming is a technique that offers a greater editing flexibility for users who want their videos to stand out. Trying to give a unique look to a video that already has a fixed color design is difficult, like trying to paint over an already sketched and colored painting. With Samsung log filming, the footage includes all the data necessary for users to create their own visual styles.

Previously, log filming was generally considered a feature available only in professional, studio-grade cameras. But now, log filming is available for anyone using Samsung Log, which offers a 10-bit HEVC codec to enable better accessibility to codec compatibility and storage.

Samsung Log has designed a log curve that offers both extended tonal range in low-light areas and smooth highlight gradation without banding. With Samsung Log, we aim to provide professional-level quality for experts and accessibility for general users.

Figure 2-1 Samsung Log video examples

2) Samsung Log - Start Filming

Log filming is supported by Pro Video mode by default. To use Log filming in Video mode, go to Camera settings, navigate to Advanced video options, and tap Log filming to “On”. In Log filming options, you can choose whether to enable Log filming for lens switch.

Pro video mode: Simply select the Log quick setting to begin Log filming.

Video mode: Select Camera settings > Advanced video options > Log > Video and Pro video modes to add Log filming to Quick settings in Video mode.
This is recommended if you find the manual controls difficult or need to switch lenses during filming.

Figure 2-2 Samsung Log video - Recording

3) Samsung Log - Exposure Monitor

You can easily check exposure during log filming with Samsung Log’s exposure monitoring features, such as zebra pattern and false color. Zebra pattern is displayed in areas where the exposure is greater than the preset value (70~100), making it easy to see overexposed areas.
False color marks all areas in different colors based on the grade of exposure: red for overexposure, light green for correct exposure, and purple for underexposure. This allows you to see overall exposure at a glance and helps set appropriate exposure settings. You can turn these features on or off before or during recording.

Figure 2-3 Samsung Log video - Exposure monitor

4) Samsung Log - Editing on a Mobile Device

You can convert log videos to a standard color profile using the Edit suggestions menu in the Gallery application.
You can also adjust brightness, contrast, and color values individually as well as apply filters using video editing programs, if further editing is necessary.
※ Compared to automatically processed videos filmed in Video mode, Samsung Log offers greater editing flexibility to enable more detailed shadow expressions and customized color tones.

Figure 2-4 Samsung Log video - Color correction

5) Samsung Log - Editing Videos on PC

For more advanced editing, you can download LUT profiles from Samsung Log and continue editing in video editing programs on PC such as DaVinci Resolve or Premiere Pro. There are two profiles available: 1D LUT and 3D LUT.

3. Samsung Log Profiles and LUT

4. Samsung Log Support Information

Support Information	Samsung Log
Filming device	All Galaxy S25 series models (S25, S25+, S25U)
Resolution	All rear camera resolutions 8K30, 8K24, UHD120, UHD60, UHD30, UHD24, FHD120, FHD60, FHD30, FHD24, HD30
Codec	10bit HEVC
Modes	Pro Video mode Video mode (the Log option needs to be enabled in Camera settings)
Lens	All rear camera lenses (UW, W, T, ST)
Pro Video mode filming options	Manual controls - Exposure monitor (Zebra pattern, False color)
Storage options	Option to save in external storage (SSD) ※ The option is supported via the Camera Assistant application.

※ The aforementioned details concerning eligibility criteria, features, and/or other relevant matters, may be subject to modification in accordance with Samsung's policies.