Video enhancement method and device

A video enhancement device, comprising:

• a processor and a memory, a set of program codes being stored in the memory and the processor executing the program codes stored in the memory to implement the following operation:
• sequentially acquiring each frame in a video;
• for each current frame, determining attribute information, which reflects a moving state or luminance, of the current frame, searching a preset mapping relationship between attribute information and a control parameter to obtain a control parameter of the current frame, and executing a video enhancement operation on the current frame by using the control parameter of the current frame;
• or,
• for each current frame, dividing the current frame into multiple regions, determining attribute information, which reflects a moving state or luminance, of each region, searching a preset mapping relationship between the attribute information and the control parameter to obtain a control parameter of each region, and executing a video enhancement operation on the current frame by using the control parameters of all the regions in the current frame;
• wherein the attribute information comprises at least one of:
• a Quantization Parameter (QP), a scenario type and a luminance value;
• wherein the control parameter comprises at least one of:
• a contrast control parameter, a definition control parameter or a noise reduction control parameter;
• wherein a value of the control parameter may be set to be multiple levels, when the control parameter is regulated to a certain level, executing a video enhancement operation on the current frame by using the value corresponding to the certain level;
• or executing a video enhancement operation on the current frame by using the values corresponding to the certain level of all the regions in the current frame;
• wherein the processor executes the program codes stored in the memory to implement the following operation:
• calculating a difference between the control parameter of the current frame and a control parameter of a previous frame, and judging whether an absolute value of the difference exceeds a specified threshold value or not;
• if the absolute value of the difference exceeds the specified threshold value, calculating a new control parameter according to the control parameter of the previous frame and the threshold value, and executing a video enhancement operation on the current frame by using the new control parameter;
• and if the absolute value of the difference does not exceed the specified threshold value, executing a video enhancement operation on the current frame by using the control parameter of the current frame;
• or
• wherein the processor executes the program codes stored in the memory to implement the following operation:
• before executing a video enhancement operation on the current frame by using the control parameters of all the regions in the current frame, for each region i in the current frame, judging whether an absolute value of a difference between a control parameter of a neighbouring region and a control parameter of the region i exceeds a specified threshold value or not;
• if an absolute value of a difference between a control parameter of at least one neighbouring region and the control parameter of the region i exceeds the specified threshold value, calculating a new control parameter according to a preset algorithm, and determining the new control parameter as the control parameter of the region i;
• and if the absolute values of the differences between the control parameters of all the neighbouring regions and the control parameter of the region i do not exceed the specified threshold value, keeping the control parameter of the region i unchanged.