Sony Patents a Camera System That Fixes Colors When Two Different Lights Hit the Same Scene
A candlelit dinner table next to a fluorescent kitchen is a nightmare for any camera's color system. Sony has filed a patent for a way to handle exactly that kind of scene, where two different light sources are fighting each other.
What Sony's mixed-lighting color fix actually does
Imagine you're taking a photo in a room where a warm bedside lamp and a cool overhead light are both on at the same time. Your camera's automatic color adjustment (called white balance) usually picks one light source to calibrate against, which means everything lit by the other source ends up looking weirdly yellow or blue.
Sony's patent describes a system that tracks two separate light sources at once and builds a color correction recipe that accounts for both of them together. Instead of picking a winner, the camera blends the color profiles from each light source to produce a more accurate final image.
This kind of dual-light awareness could be useful in professional cameras, smartphones, or video equipment where mixed lighting is common but tricky to handle well.
How the circuitry blends two light-source color profiles
The patent describes an imaging apparatus with circuitry that does three things in sequence:
- Captures an image from the sensor as usual.
- Generates color conversion information by combining a first color setting parameter (tuned to one light source) and a second color setting parameter (tuned to a second light source). A color setting parameter is essentially a mathematical profile describing how a specific type of light shifts colors away from their "true" values.
- Outputs processed image data based on that blended color conversion.
The key idea is that instead of a single white-balance value, the system holds two independent light-source models and derives a combined correction from them. The claim is intentionally broad about how the two parameters are combined, which means the actual blending math could vary widely in implementation.
The circuitry language suggests this is meant to run in dedicated image-processing hardware, like the kind found inside a camera's image signal processor (ISP), rather than in post-processing software.
What this means for photography under mixed lighting
Mixed lighting is one of the most common and least-solved problems in everyday photography. When you're shooting under two light sources with different color temperatures, say a tungsten desk lamp and daylight coming through a window, current automatic white balance systems often pick one and let the other look wrong. Sony's approach of building a correction that models both sources simultaneously is a more principled fix.
For professional video and cinema cameras, where color accuracy is critical and reshoots are expensive, this kind of hardware-level dual-source correction could reduce the time colorists spend fixing mixed-light footage in post-production. For consumers, it could simply mean photos that look right on the first try.
This is a focused, practical patent aimed at a real problem that every photographer has bumped into. It's not a flashy AI feature, but color accuracy under mixed lighting is genuinely annoying, and a hardware-level solution is more useful than asking users to fix it manually in software. Sony's imaging division has the product lines (Alpha cameras, Cinema Line, Xperia phones) where something like this would fit naturally.
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The drawings
35 drawing sheets from US 2026/0222692 A1 · click any drawing to enlarge
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