Any suggestions on how to "onion skinning"?

Ian Wood revlist at azurevision.co.uk
Thu Nov 29 06:14:30 EST 2007


Oh dear. Wikipedia strikes again. :-(

Those percentages are for very specific purposes and are NOT what is  
generally used in conversion to greyscale. The article isn't really  
*wrong*, but it doesn't bear much resemblance to most real-life usage.

Ian

On 29 Nov 2007, at 10:56, Luis wrote:

> From Wikipedia: http://en.wikipedia.org/wiki/Greyscale
>
> 'Converting color to grayscale
>
> To convert any color to its most approximate level of gray, first  
> one must obtain the values of its red, green and blue (RGB) primaries.
>
> Then, add 30% of the red value, 59% of the green value, and 11% of  
> the blue value, together. Regardless of the scale employed (0.0 to  
> 1.0, 0 to 255, 0% to 100%, etc.), the resultant number is the  
> desired gray value, such that a new RGB color would have red,  
> green, and blue values equal to the new number. These percentages  
> are chosen due to the different relative sensitivity of the normal  
> human eye to each of the primary colors (less sensitive to green,  
> more to blue).'
>
> Cheers,
>
> Luis.




More information about the Use-livecode mailing list