To capture the color that other image sensors miss,
Foveon X3® direct image sensors use three layers of pixels embedded in
silicon. The layers are positioned to take advantage of the fact that
silicon absorbs different wavelengths of light to different depths. The
bottom layer records red, the middle layer records green, and the top
records blue. Each stack of pixels directly records all of the light at
each point in the image.
Click here for an Interactive Tutorial
now, all other image sensors have featured just one layer of pixels,
capturing just one color per point the image. To capture color, the pixel
sensors in CCD and CMOS image sensors are organized in a grid, or mosaic, resembling a three-color
checkerboard. Each pixel is covered with a filter and records just one
color—red, green, or blue.
That approach has inherent drawbacks,
no matter how many pixels a mosaic-based image sensor might contain.
Since mosaic-based image sensors capture only one-third of the color,
complex processing is required to interpolate the color they miss.
Interpolation leads to color artifacts and a loss of image detail. Blur
filters must then be used to reduce color artifacts. The use of blur filters adversely affects
sharpness and resolution of the final image captured.
With its revolutionary process for
capturing light, Foveon X3 technology never needs to compromise on
quality, so you get sharper pictures, truer colors, and fewer
artifacts. And cameras equipped with Foveon X3 technology do not have
to rely on processing power to fill in missing colors, reducing
hardware requirements, simplifying designs and minimizing lag time
between one shot and the next.
Dollar for dollar, pixel for pixel, nothing compares to Foveon X3 technology.