Fast RGB to HSL convertion?

[andrea_001]

How is it possible to speed up the software convertion from RGB to HSL?

I found that this is a very time demanding task (about 70 msec on my PC). Is it possible to have such a convertion in less than 20 msec? Maybe a multiprocessor computer could solve the problem?

[Chuck_81]

Hi andrea,

I need some more information in order to better help you. For example:

• In which language are you programming? LabVIEW, CVI, VB6?
• Which function are you using? I suppose it's the IMAQ Cast Image....

If you're working in LabVIEW, the following example could be a common benchmark test:

How Do I Convert a Color Image to Grayscale?

Hope this helps,

Best Regards,

Fabio

[andrea_001]

Hi Mario,

 I am working with LabView+Vision 8.0. Actually I need to apply a color threshold with HSL as "method". I found that this thresholding takes a long time to perform the task if the input image is an RGB-image; I guess that this is because this function first convert the image in the HSL-format, in fact casting the image first in the HSL-format and passing this HSL-image to the color-threshold function results in very little time demand from the thresholding function, but it is now the cast-image function that takes a long time to perform (about 60-70 msec on my PC).

Thank you for any kind of suggestion.