A method implemented by one or more computing devices, the method comprising: receiving a request for video communication; determining whether to perform a blurring operation for a video image of a first user; and in response to determining that the blurring operation is to be performed for the video image of the first user, obtaining the video image of the first user, performing the blurring operation for the video image of the first user; and displaying a blurred video image of the first user in a video dialog window of a second user terminal, wherein, while the first user and a second user conduct video communications with each other, the method further comprises: determining a region of operation corresponding to operation information in response to detecting an operation on the video image of the first user, wherein the operation on the video image of the first user defines a portion of the video image that is to be displayed clearly, the operation being performed on the blurred video image of the first user displayed in a video dialogue window of a first user terminal or the video dialog window of the second user terminal; and while displaying the video image of the first user, performing the blurring operation only on a portion of the video image of the first user that is outside of the region of operation to gradually transition between the blurred image and a partially blurred image as the respective user performs the operation on the video image. receiving a request for video communication; determining whether to perform a blurring operation for a video image of a first user; and in response to determining that the blurring operation is to be performed for the video image of the first user, obtaining the video image of the first user, performing the blurring operation for the video image of the first user; and displaying a blurred video image of the first user in a video dialog window of a second user terminal, wherein, while the first user and a second user conduct video communications with each other, the method further comprises: determining a region of operation corresponding to operation information in response to detecting an operation on the video image of the first user, wherein the operation on the video image of the first user defines a portion of the video image that is to be displayed clearly, the operation being performed on the blurred video image of the first user displayed in a video dialogue window of a first user terminal or the video dialog window of the second user terminal; and while displaying the video image of the first user, performing the blurring operation only on a portion of the video image of the first user that is outside of the region of operation to gradually transition between the blurred image and a partially blurred image as the respective user performs the operation on the video image. obtaining the video image of the first user, performing the blurring operation for the video image of the first user; and displaying a blurred video image of the first user in a video dialog window of a second user terminal, wherein, while the first user and a second user conduct video communications with each other, the method further comprises: determining a region of operation corresponding to operation information in response to detecting an operation on the video image of the first user, wherein the operation on the video image of the first user defines a portion of the video image that is to be displayed clearly, the operation being performed on the blurred video image of the first user displayed in a video dialogue window of a first user terminal or the video dialog window of the second user terminal; and while displaying the video image of the first user, performing the blurring operation only on a portion of the video image of the first user that is outside of the region of operation to gradually transition between the blurred image and a partially blurred image as the respective user performs the operation on the video image. determining a region of operation corresponding to operation information in response to detecting an operation on the video image of the first user, wherein the operation on the video image of the first user defines a portion of the video image that is to be displayed clearly, the operation being performed on the blurred video image of the first user displayed in a video dialogue window of a first user terminal or the video dialog window of the second user terminal; and while displaying the video image of the first user, performing the blurring operation only on a portion of the video image of the first user that is outside of the region of operation to gradually transition between the blurred image and a partially blurred image as the respective user performs the operation on the video image.