Thus Grey scale is just a numerical representation of brightness for one small spot on the array. Another useful camera term is resolution. The resolution of a camera can be thought of as the accuracy or as its ability to reproduce the same image or view. This resolution is directly proportional to the number of pixels on this light striking surface. A mini camera with a stated resolution of 256 x 256 array will have better resolution than a 128 x 128 array.
Higher resolution means greater accuracy when measuring or viewing an object.
This means the pixels or spots are more numerous and generally closer together thus the ability to gather light or intensity information from a given source is more accurate. Once all this information is set in a storage area on the back of each pixel, it is then gathered up and processed. Most CCD arrays use some type of multiple rows shifting in a serial fashion in a form of a data stream. This process repeats until all the rows are transferred off the chip. The data is then reconstructed by some additional electronics into what is called composite video.