Determining a final exposure setting automatically for a solid state camera without a separate light metering circuit

摘要

An embodiment of the invention is a method of generating a final exposure setting, including, (a) selecting one of a number of predetermined exposure settings as a current exposure setting for a solid state camera having a camera imager, (b) generating a captured scene by the camera imager using the current exposure setting, (c) selecting according to an automated search methodology another one of the exposure settings to be the current setting in response to the captured scene being underexposed or overexposed, and, (d) repeating (b) and (c) until the captured scene is neither underexposed or overexposed.

主权项

1. A method for generating a final exposure setting, comprising:
selecting an initial exposure setting for a solid state camera having a camera imager; capturing a sample scene by the camera imager using the initial exposure setting; checking the sample scene for clipping, wherein clipping occurs when a preset number of pixels in the sample scene have a maximum or minimum value; and reducing a sample window in response to determining that clipping did occur.