Method for displaying image in photographing scenario and electronic device

A mobile device, including computer-executable instructions, that when executed by a processor, cause the processor to carry out at least the following operation:

• activating a color camera and a camera application on an electronic device;
• activating a video recording function;
• capturing a first original color image by the color camera;
• determining, automatically, whether the first original color image includes an image of a first object;
• dividing, in response to a determination that the first original color image includes the image of the first object, the first original color image into a first region associated with the first object and a second region that does not include the first object;
• generating a first image based on the first original color image by keeping color pixels of the first region and converting color pixels of the second region to grayscale pixels;
• displaying, through the camera application, the first image, wherein the first image includes a color region associated with the first object and a grayscale region that does not include the first object;
• displaying, through the camera application and in response to a determination that the first original color image does not include any image of the first object, a second image generated based on the first original color image, wherein the second image is a grayscale image;
• and
• generating, in response to a user input, a video including at least one of the first image or the second image.