Time Division Based Band Pass Image Generation Method and Time Division Based Band Pass Image Generation System Capable of Generating Single-band Pass Images and Dual-band Pass Images

A time division based band pass image generation system comprising:

• an image sensor configured to acquire a raw image outputted from a color filter array;
• a signal decoding unit coupled to the image sensor and configured to acquire image information outputted from the image sensor and a plurality of timing signals;
• a band pass image processing unit coupled to the signal decoding unit and configured to generate a single-band pass image and a dual-band pass image during different time intervals;
• an image identification signal control unit coupled to the signal decoding unit and the band pass image processing unit and configured to generate an image identification signal;
• an image processing and exposure control unit coupled to the image sensor, the band pass image processing unit, and image identification signal control unit and configured to process the single-band pass image and the dual-band pass image separately and configured to control exposure parameters of the image sensor;
• an infrared light filling control unit coupled to the image sensor and the image identification signal control unit and configured to generate an infrared light control signal for controlling an infrared light filling device to generate an infrared light signal;
• and
• an image and identification signal output unit coupled to the image identification signal control unit and the image processing and exposure control unit, and configured to output image identification signals during different time intervals and configured to output a processed single-band pass image and a processed dual-band pass image;
• wherein the raw image is demosaicked by performing an interpolation process for generating a red channel image, a green channel image, a blue channel image, and an infrared channel image, the band pass image processing unit generates the single-band pass image during a first time interval according to the red channel image, the green channel image, the blue channel image, and the infrared channel image, the band pass image processing unit generates the dual-band pass image during a second time interval according to the red channel image, the green channel image, the blue channel image, and the infrared channel image, the red channel image, the green channel image, and the blue channel image comprise visible light information and invisible light information, the infrared channel image comprises invisible light information, and the first time interval and the second time interval are non-overlapped.