Pixel processing with color component

The method of claim wherein

• checking whether said color component in said color space resulting in said smallest error causes any color channel of said pixel to fall outside of said allowed range comprises checking whether a luma component of said pixel resulting in a smallest error between i) a luminance determined based on said luma component and an original luminance determined based on original red, green and blue color components of said pixel or ii) red, green and blue color components determined based on said luma component and said original red, green and blue color components of said pixel causes any color channel of said pixel to fall outside of said allowed range;
• obtaining said value comprises obtaining a value of said luma component using said first function or said first look-up table if said luma component resulting in said smallest error does not cause any color channel of said pixel to fall outside of said allowed range;
• and
• obtaining said value comprises obtaining a value of said luma component using said second, different function or said second, different look-up table if said luma component resulting in said smallest error causes any color channel of said pixel to fall outside of said allowed range.

A device of processing a pixel in a picture, wherein

• said device is configured to check whether a color component of said pixel in a color space resulting in a smallest error between at least one color component in another color space determined based on said color component in said color space and at least one original color component of said pixel in said another color space causes any color channel of said pixel to fall outside of an allowed range;
• said device is configured to obtain a value of said color component in said color space using a first function or a first look-up table if said color component in said color space resulting in said smallest error does not cause any color channel of said pixel to fall outside of said allowed range;
• and
• said device is configured to obtain a value of said color component in said color space using a second, different function or a second, different look-up table if said color component in said color space resulting in said smallest error causes any color channel of said pixel to fall outside of said allowed range.