Method for capturing image during video recording and electronic device

An electronic device, comprising a touchscreen, a memory that is non-transitory, a camera, a display, and one or more processors, wherein the touchscreen, the memory, the camera, and the display are coupled to the processor, the memory stores computer program code, the computer program code comprises computer instructions, and when the computer instructions are executed by the processor, the electronic device performs operations comprising:

• receiving a first operation of a user, wherein the first operation is used to trigger the electronic device to start recording a video;
• displaying a viewfinder screen in response to the first operation, wherein the viewfinder screen displays a preview image stream, the preview image stream comprises n frames of preview images, the preview images are obtained based on n frames of first images collected by the camera of the electronic device after the electronic device receives the first operation, the viewfinder screen further comprises a snapshot shutter, the snapshot shutter is configured to trigger the electronic device to take a snapshot, the n frames of the first images are stored in a first buffer queue of the electronic device, n≥1, and n is an integer;
• receiving a second operation of the user;
• stopping recording the video in response to the second operation;
• saving the video;
• when the camera collects a qth frame of a first image in the n frames of the first images, receiving a third operation performed by the user on the snapshot shutter;
• and
• performing, in response to the third operation, image processing on the qth frame of the first image saved in the first buffer queue to obtain a captured image;
• periodically performing image processing on k frames of the first images buffered in the first buffer queue to obtain a second image, wherein k≥1, and k is an integer;
• wherein the performing, in response to the third operation, image processing on the qth frame of the first image saved in the first buffer queue to obtain the captured image comprises:
• performing, in response to the third operation, image quality enhancement on a fourth image by using a latest frame of second image obtained when the electronic device receives the third operation, to obtain the captured image, wherein the fourth image is one frame of image in the video whose time information is the same as time information of the qth frame of the first image;
• wherein the image quality enhancement comprises image super-resolution;
• and
• resolution of the second image and the captured image is higher than resolution of the qth frame of the first image.

A non-transitory computer-readable storage medium, comprising computer instructions, wherein when the computer instructions are run on an electronic device, the electronic device performs operations comprising:

• receiving a first operation of a user, wherein the first operation is used to trigger the electronic device to start recording a video;
• displaying a viewfinder screen in response to the first operation, wherein the viewfinder screen displays a preview image stream, the preview image stream comprises n frames of preview images, the preview images are obtained based on n frames of first images collected by a camera of the electronic device after the electronic device receives the first operation, the viewfinder screen further comprises a snapshot shutter, the snapshot shutter is configured to trigger the electronic device to take a snapshot, the n frames of the first images are stored in a first buffer queue of the electronic device, n≥1, and n is an integer;
• receiving a second operation of the user;
• stopping recording the video in response to the second operation;
• saving the video;
• when the camera collects a qth frame of a first image in the n frames of the first images, receiving a third operation performed by the user on the snapshot shutter;
• and
• performing, in response to the third operation, image processing on the qth frame of the first image saved in the first buffer queue to obtain a captured image, wherein performing the image processing on the qth frame of the first image comprises performing image processing on m frames of the first images to obtain the captured image, wherein the m frames of the first images comprise the qth frame of first image, m≥1, and m is an integer,
• wherein, the image processing on the m frames of the first images to obtain the captured image comprises image processing in a RAW domain and image signal processor (ISP) image processing, the image processing in the RAW domain is image processing performed in RAW color space, the ISP image processing is image processing performed by using an ISP of the electronic device, and image quality of the captured image is better than image quality of the qth frame of the first image,
• or wherein the image processing on the m frames of the first images to obtain the captured image comprises the image processing in the RAW domain, the ISP image processing, and encoding processing, and the image quality of the captured image is better than the image quality of the qth frame of the first image.