The phrase "a matrix metering" is correct and usable in written English.
It can be used in contexts related to photography or camera settings, specifically when discussing a type of exposure metering system.
Example: "The camera features a matrix metering system that evaluates the entire scene for optimal exposure."
Alternatives: "evaluative metering" or "matrix exposure measurement".
What you want to do in capturing a silhouette, is to use matrix metering, because this approach takes into account all available light and averages the result to set your camera's aperture and shutter speed.
Active D-Lighting — reproducing brightness as you see it In settings with strong contrast, Active D-Lighting, used in combination with 3D Matrix Metering II, determines an exposure by utilizing a gradation of highlights, detects lost shadows, then reproduces them after digital processing.
The new EXPEED 2 TM image‐processing engine fuels the enhanced performance of the D7000 along with a new 39‐point AF system and groundbreaking new 2,016 pixel RGB 3D Matrix Metering System to deliver amazing image quality in a variety of shooting conditions.
But the programmed exposure modes and the Matrix metering system check out unless an AF Nikkor is used.
What Nikon used to call AMP metering (Automatic Multi-Pattern metering) is now called Matrix metering.
According to Schiller, it also does autofocus matrix metering.
Apple also touts the new iPhone 5S' as having autofocus matrix metering with 15 focus zones.
Additionally, Nikon's exclusive 3D Color Matrix Metering II helps to ensure accurate exposures, even in the most challenging lighting conditions.
Active D-lighting system 3D Color Matrix Metering II (this and the above thing are replacements for post-processing, which is both fun and rewarding, so no need for 'em) Stop-motion movie mode (probably fun).
Matrix metering is mainly used in high-end digital still cameras whereas this technology is not very suitable for video cameras due to its complexity and stability for dynamic scenes.
