How to convert UVYV to HSL?

[andrea_001]

 I want to apply the color threshold function of NI-Vision in HSL mode.

How can I convert a UVYV image to a HSL image? Would this conversion be faster then a RGB-to-HSL conversion?

[Filippo_Persia]

Dear Andrea,

I understand you want to switch from somekind of colormap called UVYV to HSL ? Unfortunately I don't know how this UVYV colormap works.

I do suspect UVYV is not supported by our vision module, searching "uvyv" in the Vision assistant help I find nothing, while I do find useful funcions for RGB and HSL.

I searched also in Wikipedia but I didn't find UVYV connected to RGB or HSL.
If you have a mathematical description of UVYV likely you can extract the transformation to and from HSL and then wirite the associated code.

Best Regards.

[andrea_001]

Dear Jon,

 thank you for your reply.

I have found the description of the UYVY in http://www.fourcc.org/yuv.php#UYVY (it is similar to the UVY format).

I am interested in this argument because I am considering the acquisition of a TheImagingSource firewire-camera, that use the UYVY image format. I saw that these kind of cameras are supported by the NI-firewire-driver. I wonder about the actual image format of the images acquired by this camera-driver set and passed to other Vision VI.

[Filippo_Persia]

HI Andrea,

two points

1-If you can connect your Firewire Camera to the PC and see a meaningful image/video in MAX ( measurement and automation explorer) you can use the camera successflully also with LabVIEW or any other Development Environment supported by the Vision Module.

2-If you are interested in recording ad playing AVI files I strongly suggest you searching for AVI in our developer zone .

For instance I was able to find these documents:

AVI Read Write With Data

Also this document may be useful

Streaming Images to Disk with NI Vision

Have a good Day

Message Edited by Jon_Snow on 09-02-2008 05:15 AM