Image processing device and image processing method

An image processing device comprising:

• a coarse histogram generator configured to receive first image data generated in response to detection of reflection of first light pulses generated by a light source that is directed to illuminate, and is reflected from, a target object and generate a first coarse histogram based on the first image data;
• a fine histogram generator in communication with the coarse histogram generator to receive the first coarse histogram and configured to generate a first fine histogram based on the first coarse histogram and second image data generated in response to detection of reflection of second light pulses generated by the light source from the target object;
• a depth information generator in communication with the fine histogram generator to receive the first fine histogram and configured to generate first depth information based on the first fine histogram;
• and
• a light source controller in communication with the depth information generator to receive the first depth information and configured to determine a first shot number of third light pulses and a second shot number of fourth light pulses based on the first depth information.

An image processing device, comprising:

• a coarse histogram generator configured to receive first image data generated in response to first light pulses reflected from a target object and generate a first coarse histogram based on first image data;
• a depth information generator in communication with the coarse histogram generator to receive the first coarse histogram and configured to generate first depth information based on the first coarse histogram;
• and
• a light source controller in communication with the depth information generator to receive the first depth information and configured to determine a first shot number of second light pulses and a second shot number of third light pulses based on the first depth information.