Noise reduction for lightmap

A device, comprising:

• a noise detection module, configured to obtain a lightmap;
• and determine, by using each pixel in the lightmap as a target pixel, a noise reduction reference region corresponding to the target pixel in the lightmap, the noise reduction reference region comprising a reference pixel for noise reduction reference;
• a light module, configured to determine, for each reference pixel, a distance in three-dimensional space between the reference pixel and the target pixel;
• and determine a light contribution parameter value of the reference pixel to the target pixel based on the distance;
• and
• a noise reduction module, configured to obtain light data recorded for the reference pixel in the lightmap;
• and perform, based on the light contribution parameter value and the light data of the reference pixel, noise reduction on light data recorded for the target pixel in the lightmap, to obtain a noise-reduced lightmap.

A non-transitory computer readable medium that contains computer instructions that, when executed by one or more computer processors causes those processors to perform actions comprising:

• determining, by using each pixel in a lightmap as a target pixel, a noise reduction reference region corresponding to the target pixel in the lightmap, the noise reduction reference region comprising a reference pixel for noise reduction reference;
• determining a distance between the reference pixel and the target pixel;
• determining a light contribution parameter value of the reference pixel to the target pixel based on the distance;
• obtaining light data recorded for the reference pixel in the lightmap;
• reducing, based on the light contribution parameter value and the light data of the reference pixel, noise on light data recorded for the target pixel in the lightmap;
• and
• generating, based on the reducing, a noise-reduced lightmap.