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Unlike simply using any inspection monitor on set to judge the effectiveness of a video image, false color uses the pixel data directly from the camera sensor to establish the integrity of the values present in the video file. How can filmmakers best utilize false color to have a positive impact on their next project

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Then, selecting an f-stop based on the color reaction.įor false color apps that plug into Adobe Premiere and DaVinci Resolve, visit for trial apps and full licensed versions for sale. F-stops are determined by evaluating the image on a monitor. However, it does not actually tell you how bright your light sources are, how many foot-candles are present on a film set, or what f-stop will expose your subject correctly. Image courtesy: Time in Pixels website Limitations of the false color overlayĪny false color overlay tells you how bright objects are on a screen using the IRE scale.

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Average skin tone on most humans happens between 55 and 70 IRE respectively. Using both a false color monitor, and a waveform monitor in conjunction would provide the best understanding of image exposure in an active shooting environment. Initially, it can be hard to get used to which colors represent which IRE levels from 0 to 100%. Darker subjects or scenes may render best at 40 to 48 IRE in order to keep other values in check, like shadows and highlight details. However, white skin renders best at 60 to 70, while brown skin may show better at 48 to 52 IRE. On a traditional waveform monitor the “flesh line” is at 55 to 60 IRE. Knowing the proper IRE value range for flesh is key. Graphic by the author Properly exposing for your subject

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Usable highlights will show as yellow.Ī series of false colors used to represent the different zones on a waveform Image courtesy: Manhattan LCD The Zone System compared to the IRE “zones” for exposure on a waveform monitor. This zone is also referred to as the “clipping” zone.

Values in the 100 to 108 range of the false color scale, represented by the color red, demonstrate “super-white” areas where no color shading or details. These areas have no light and no color information in the file.

Values in the 0 to 7% range, represented here in white, are known as “super-black” values. So, a good skin tone might appear bright purple (or pink), light grey, or green respectively, according to the reference chart. Proper skin tone registers anywhere from 42 and 78 IRE depending on the reflectance. “Middle grey,” or 18% grey (as in a grey card) falls between 48 and 52 IRE. That’s where no detail remains in the highlights at all. As the IRE value approaches 100, the details retained in the highlights of the image become less and less – until the point of clipping. Looking at luminance levelsĪ typical scene will register luminance values between 10 and 85 IRE with absolute black residing below 10%, and absolute white values residing between 86 and 96%. Therefore, the appropriate false color scale must be memorized to be effective in a practical work environment. Commonality is expected, but not always present.

False “colors” are arbitrarily assigned by brand. Notice the Arri system doesn’t use any grey values for flesh, or a white or purple value to indicate super-black. It creates a more “visual” relationship between objects in frame, and their relative brightness. This is an Arri Alexa false color IRE scale from the camera’s on-board menu system.

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