Dynamic tone mapping method, mobile terminal, and computer readable storage medium

A mobile terminal, comprising:

• a memory, a processor, and a dynamic tone mapping program stored on the memory and executable on the processor, the dynamic tone mapping program when executed by the processor performing the following operations:
• pre-generating a tone mapping look-up table which comprises a plurality of tone mapping data groups, wherein each of the tone mapping data groups comprises a dynamic range and an average brightness, and the dynamic range and the average brightness in each of the tone mapping data groups are debugged based upon hardware parameters, and each of the tone mapping data groups corresponds to maximum brightness information and average brightness information;
• acquiring maximum brightness information and average brightness information of a frame to be displayed on a display terminal;
• inquiring a tone mapping data group in the tone mapping look-up table based on the acquired maximum brightness information and the acquired average brightness information of the frame to be displayed;
• and
• calling the inquired tone mapping data group and transforming a tone mapping by the dynamic range and the average brightness of the inquired tone mapping data group on the frame to be displayed on the display terminal, wherein
• the operation of “inquiring a tone mapping data group in the tone mapping look-up table based on the acquired maximum brightness information and the acquired average brightness information of the frame to be displayed”, further comprises:
• determining whether the acquired maximum brightness information and the acquired average brightness information have a correspondence with the dynamic range and the average brightness of the tone mapping data group in the tone mapping look-up table;
• and
• if yes calling the inquired tone mapping data group and transforming the tone mapping by the dynamic range and the average brightness of the inquired tone mapping data group on the frame to be displayed on the display terminal, and
• if no, determining whether the maximum brightness information and the average brightness information is replaceable by another maximum brightness information and another average brightness information having adjacent values which has a correspondence with one of the tone mapping data groups.

A non-transitory computer readable storage medium, wherein a dynamic tone mapping program is stored in the computer readable storage medium, and the dynamic tone mapping program when executed by a processor performs the following operations:

• pre-generating a tone mapping look-up table which comprises a plurality of tone mapping data groups, wherein each of the tone mapping data groups comprises a dynamic range and an average brightness, and the dynamic range and the average brightness in each of the tone mapping data groups are debugged based upon hardware parameters, and each of the tone mapping data groups corresponds to maximum brightness information and average brightness information;
• acquiring maximum brightness information and average brightness information of a frame to be displayed on a display terminal;
• inquiring a tone mapping data group in the tone mapping look-up table based on the acquired maximum brightness information and the acquired average brightness information of the frame to be displayed;
• and
• calling the inquired tone mapping data group and transforming a tone mapping by the dynamic range and the average brightness of the inquired tone mapping data group on the frame to be displayed on the display terminal, wherein
• the operation of “inquiring a tone mapping data group in the tone mapping look-up table based on the acquired maximum brightness information and the acquired average brightness information of the frame to be displayed”, further comprises:
• determining whether the acquired maximum brightness information and the acquired average brightness information have a correspondence with the dynamic range and the average brightness of the tone mapping data group in the tone mapping look-up table;
• and
• if yes, calling the inquired tone mapping data group and transforming the tone mapping by the dynamic range and the average brightness of the inquired tone mapping data group on the frame to be displayed on the display terminal, and
• if no, determining whether the maximum brightness information and the average brightness information is replaceable by another maximum brightness information and another average brightness information having adjacent values which has a correspondence with one of the tone mapping data groups.