Capturing Color
regrettably , each photosite is colorblind . It only keeps track of the total intensity of the lightness that strikes its Earth’s surface . to get a full people of colour image , most sensors usefilteringto look at the Christ Within in its threeprimary colors . Once the camera tape all three color , it combines them to make the full spectrum .
There are several direction of record the three colors in a digital camera . The high quality television camera use three separate sensing element , each with a different filter . Abeam splitterdirects light to the different sensors . Think of the Light Within entering the camera as water menstruate through a pipage . Using a ray of light splitter would be like dividing an identical amount of pee into three dissimilar pipe . Each sensing element find an very look at the image ; but because of the filters , each sensor only responds to one of the principal colour .
The advantage of this method acting is that the television camera record each of the three colors at each pixel location . regrettably , cameras that use this method incline to be bulky and expensive .
Another method acting is torotatea serial publication of crimson , low and green filter in front of a individual sensing element . The detector records three separate effigy in speedy succession . This method also provides info on all three colors at each pixel position ; but since the three prototype are n’t take at precisely the same bit , both the camera and the target of the photo must stay stationary for all three readings . This is n’t practical for outspoken photography or handheld cameras .
Both of these method work well for professional studio apartment cameras , but they ’re not necessarily practical for perfunctory snap . Next , we ’ll reckon at filtering methods that are more suited to small , effective camera .
