Abstract: A SAR ADC includes: a sample-hold (S/H) circuit sampling an input voltage to generate a S/H output signal; a DAC generating a DAC output signal; a comparator comparing the DAC output signal with the S/H output signal to generate a comparison output signal; a SAR combinational digital circuit group; a multiplexer circuit; and a plurality of registers for registering the comparison output signal as register output signals and outputting as an output signal of the SAR ADC. The SAR combinational digital circuit group generates a plurality of first and second SAR output signals based on the register output signals. The multiplexer circuit is controlled by on the register output signals to select among the first and the second SAR output signals as a plurality of multiplexer output signals for sending to the DAC. A capacitor coupling relationship of the DAC is controlled by the multiplexer output signals.

Abstract: A method for analyzing images includes: obtaining at least one brightness value of at least one area of an image of a scene; obtaining a brightness value of the same at lease one area of each of a predetermined number of previous images of the scene and calculating an average brightness of the same at lease one area of the predetermined number of previous images to obtain at least one average brightness value; comparing the at least one brightness value of the image with that of the predetermined number of previous images to obtain at least one brightness difference value; comparing the at least one brightness difference value with a first value and a second value; adjusting a reference background model according to a first adjustment mode or a second adjustment according to the comparison result.

Abstract: A method for analyzing images includes: obtaining at least one brightness value of at least one area of an image of a scene; obtaining a brightness value of the same at lease one area of each of a predetermined number of previous images of the scene and calculating an average brightness of the same at lease one area of the predetermined number of previous images to obtain at least one average brightness value; comparing the at least one brightness value of the image with that of the predetermined number of previous images to obtain at least one brightness difference value; comparing the at least one brightness difference value with a first value and a second value; adjusting a reference background model according to a first adjustment mode or a second adjustment according to the comparison result.