What is a LUT (Look up table)

Understanding LUTs and Their Benefits

A LUT, or Look-Up Table, is a tool used in color grading to map one set of color values to another. It acts as a preset that applies specific color transformations to images or videos, ensuring consistent color grading, simulating film stocks, or creating particular aesthetics. LUTS are essential in video production, photography, and post-production for achieving a cohesive visual style.

How LUTS Work

LUTS function by transforming input color values into output values according to predefined settings. For instance, if an image features a certain shade of blue, the LUT can modify this shade to achieve a different color balance or mood.

Types of LUTs

  • 1D LUTS: These adjust individual color channels (red, green, blue) independently. They are simpler and often used for basic color correction.
  • 3D LUTs: These offer more complex transformations by adjusting the relationships between color channels. They allow for advanced color grading and effects, forming the basis of Simple LUTs.

Applications of LUTS

  • Color Correction: LUTS correct colors to meet desired standards, such as adjusting white balance or exposure.
  • Creative Grading: They serve as a foundation for applying various creative looks, such as cinematic or vintage styles, which are widely available online.
  • Matching Cameras: When using multiple cameras, LUTS help match their color outputs for consistent footage.

LUTS are popular for their ability to provide quick and consistent color grading, making them an indispensable tool for filmmakers, photographers, and video editors.

Filming in Log Profiles

Filming in Log profiles, including LOG, D-Log Log-M, and HLG formats, offers significant advantages in dynamic range, color grading flexibility, and final image quality.

  • Extended Dynamic Range: Log profiles capture a wide dynamic range, preserving details in both highlights and shadows. This is crucial for challenging lighting conditions, providing smoother gradations and more natural images.
  • Greater Flexibility in Post-Production: Log footage features a flat image with low contrast and saturation, ideal for extensive color grading. This flat base allows for precise adjustments and makes it easier to match footage across different cameras.
  • Future-Proofing: Many Log profiles record in 10-bit or higher, capturing more color information. This enhances the current project and ensures compatibility with future technologies and displays.
  • D-Log-M: Optimised for smaller sensors, DLog-M profiles are designed for devices with limited dynamic range, offering some benefits of Log profiles with easier post-production handling.

Benefits of Filming in the HLG Profile.

  • Enhanced Image Quality: HLG formats capture a broader range of colors and shades, resulting in vibrant, true-to-life images with greater depth and realism. They provide better contrast and brightness, fully utilizing displays capable of higher dynamic range.
  • Improved Viewing Experience: Filming in HLG ensures content looks its best on the latest displays. HLG is backward compatible with SDR screens, so content looks good on both SDR and HDR devices.
  • Real-Time Benefits: HLG profiles allow for impressive footage straight out of the camera, reducing the need for extensive post-processing. HLG produces natural-looking images with minimal adjustments.

Conclusion

Filming in Log profiles enhances dynamic range, color grading flexibility, and future-proofing, making it essential for professional and advanced amateur videographers. DLog-M profiles offer benefits for smaller sensors, while HLG profiles provide vibrant colors and better contrast, ensuring content remains relevant and visually appealing across different displays.

Simple LUTS are designed to work seamlessly with high-quality codecs such as ProRes 422 and 10-bit HEVC. They are optimised for:

  • High Bit Depth: Ensuring preservation of color information and smooth gradations, minimising banding and artifacts.
  • High-Quality Processing: Consistent performance across codecs, reducing the risk of compression artifacts and providing reliable color grading results.
  • Testing Across Real-World Scenarios: Ensuring compatibility with various shooting conditions and camera profiles, providing consistent results.
  • Professional-Level Results: Offering accurate color grading with creative flexibility and efficiency, compatible with major editing software.

Simple LUTS are rigorously tested and optimised to deliver professional-quality results, making them a valuable tool for filmmakers and editors working with high-quality codecs and diverse shooting conditions.