Image devices including image sensors and image signal processors, and operation methods of image sensors

An image device comprising:

• an image sensor including,
• a plurality of pixels configured to output first analog signals and second analog signals, the first analog signals corresponding to a first exposure time and the second analog signals corresponding to a second exposure time, the second exposure time being shorter than the first exposure time,
• an analog-to-digital converter configured to convert the first analog signals and the second analog signals to obtain digital signals including a first image and a second image, and
• first processing circuitry configured to,
• receive information about a white balance gain from an image signal processor,
• generate a pre-processed image by performing pre-processing on the first image based on the information about the white balance gain, and
• generate a third image by performing motion compensation based on the pre-processed image;
• and
• the image signal processor including second processing circuitry, the second processing circuitry being configured to perform white balancing on the third image from the image sensor based on the white balance gain to obtain a white balanced image.

An operation method of an image sensor, the method comprising:

• detecting a motion region based on a first image and a second image to obtain a detected motion region, the first image corresponding to a first exposure time and the second image corresponding to a second exposure time, the second exposure time being shorter than the first exposure time;
• determining a weight for the detected motion region;
• generating a pre-processed image by,
• obtaining information about a white balance gain from an external image signal processor, and
• performing signal pre-processing on the first image based on the information about the white balance gain, the signal pre-processing including,
• using brightness information of the first image and color information of the second image to generate the pre-processed image, or
• clipping maximum values of color channel data of the first image based on a plurality of threshold values to generate the pre-processed image;
• and
• outputting a third image based on the pre-processed image and the weight.