Illustration
To reconstruct a full color image from the data collected by the color filtering array, a form of interpolation is needed to fill in the blanks. The mathematics here is subject to individual implementation, and is called demosaicing.
In this example, we use Adobe Photoshop's bicubic interpolation to simulate the circuitry of a Bayer filter device such as a digital camera.
The image below simulates the output from a Bayer filtered image sensor; each pixel has only a red, green or blue component. The corresponding original image is shown alongside the demosaiced reconstruction at the end of this section.
| Bayer filter samples | ||
| Red | Green | Blue |
A digital camera typically has means to reconstruct a whole RGB image using the above information. The resulting image could be something like this:
| Original | Reconstructed |
The reconstructed image is typically accurate in uniform-colored areas, but has a loss of resolution (detail and sharpness) and has edge artifacts (for example, the edges of letters have visible color fringes and some roughness).
Read more about this topic: Demosaicing
Famous quotes containing the word illustration:
“An illustration is no argument,—nor do I maintain the wiping of a looking-glass clean, to be a syllogism;Mbut you all, may it please your worships, see the better for it.”
—Laurence Sterne (1713–1768)
“Each truth that a writer acquires is a lantern, which he turns full on what facts and thoughts lay already in his mind, and behold, all the mats and rubbish which had littered his garret become precious. Every trivial fact in his private biography becomes an illustration of this new principle, revisits the day, and delights all men by its piquancy and new charm.”
—Ralph Waldo Emerson (1803–1882)
“What is character but the determination of incident? What is incident but the illustration of character?”
—Henry James (1843–1916)