Image acquisition apparatus including a plurality of image sensors, and electronic apparatus including the image acquisition apparatus

A method of controlling an image acquisition apparatus including a plurality of image sensors, the method comprising:

• acquiring a first image and a second image from a first image sensor having a first wavelength band and a second image sensor having more channels than the first image sensor and having a second wavelength band comprising the first wavelength band, respectively;
• registering the acquired first and second images to obtain a registration image;
• and
• performing color conversion on the registration image by using an illumination value estimated from the second image,
• wherein the performing color conversion further comprises:
• dividing the first image into one or more first regions and dividing the second image into one or more second regions respectively corresponding to the one or more first regions;
• estimating a respective illumination value for each of the one or more second regions;
• performing the color conversion on each of the one or more first regions by using the estimated illumination values, and
• when a difference between illumination values respectively estimated for adjacent second regions of the one or more second regions is greater than or equal to a first threshold value, adjusting any one of the illumination values of the adjacent second regions to adjust the difference to be less than the first threshold value.

An image acquisition apparatus comprising:

• a first image sensor comprising a first filter and configured to acquire a first image based on a first wavelength band;
• a second image sensor comprising a second filter, having more channels than the first image sensor, and configured to acquire a second image based on a second wavelength band comprising the first wavelength band;
• and
• a processor configured to:
• receive the first image of an object from the first image sensor and the second image of the object from the second image sensor;
• and
• based on the received first image and the received second image, generate a white balanced first image of the object by eliminating an influence of illumination reflected by the object,
• wherein the processor is further configured to:
• divide the first image into one or more first regions and divide the second image into one or more second regions respectively corresponding to the one or more first regions;
• estimate a respective illumination value for each of the one or more second regions;
• perform the color conversion on each of the one or more first regions by using the estimated illumination values, and
• when a difference between illumination values respectively estimated for adjacent second regions of the one or more second regions is greater than or equal to a first threshold value, adjust any one of the illumination values of the adjacent second regions to adjust the difference to be less than the first threshold value.