Tone consistency for camera imaging

An electronic device comprising:

• at least one processing device configured to:
• obtain a single frame image from a multi-frame processing pipeline;
• obtain a hardware image signal processing (HWISP) reference image;
• obtain luma components of the HWISP reference image and luma components of the single frame image;
• generate a gain curve based on data distributions of the luma components of the HWISP reference image and the luma components of the single frame image;
• apply respective gains to the luma components of the single frame image based on the gain curve to obtain modified luma components;
• obtain chroma components of the single frame image;
• apply a saturation gain to the chroma components of the single frame image based on the gain curve and the luma components of the single frame image to obtain modified chroma components;
• and
• combine the modified luma components and the modified chroma components to generate a final image.

A non-transitory machine readable medium comprising instructions that when executed cause at least one processor of an electronic device to:

• obtain a single frame image from a multi-frame processing pipeline;
• obtain a hardware image signal processing (HWISP) reference image;
• obtain luma components of the HWISP reference image and luma components of the single frame image;
• generate a gain curve based on data distributions of the luma components of the HWISP reference image and the luma components of the single frame image;
• apply respective gains to the luma components of the single frame image based on the gain curve to obtain modified luma components;
• obtain chroma components of the single frame image;
• apply a saturation gain to the chroma components of the single frame image based on the gain curve and the luma components of the single frame image to obtain modified chroma components;
• and
• combine the modified luma components and the modified chroma components to generate a final image.