IMAQ supports 4-channel CCD cameras?

Current color cameras have 3 channels R, G and B, but the image generated RGB is 32-bit, which means there is an another 8 bits that are not used, correct?

I don't know how IMAQ driver includes all channels of a pixel in an RGB image? Support 4-channel CCD cameras?

Hello Robert and MengHuiHanTang,

By default, NEITHER-IMAQ framegrabbers RGB 32 bit mode ignores the alpha channel.  However, if you write your files from camera, as if the camera is out four taps of 8-bit (monochrome), then the framegrabber will acquire data in a single image monochrome, four times as wide.

If you choose the file attached camera (assuming 512 pixels high and 2048 pixels of RGB, monochrome 8192 pixels wide) wide, then a single image of the framegrabber will plans red, green, blue and alpha image-by-side, as in the joint .png (each plane color of the camera is output a constant pixel value).

You may also interlace RGB and alpha planes by replacing "NumCameraXZones" 1 and "NumCameraTapsPerXZone" by 4 and acquire again (you will have to perhaps refresh or come back if you use MAX).  That would put the red, green, blue and IR pixel-by-side in the picture.  Your image would be still 4 x wide.

The trick is that the acquired image is monochrome, but you certainly can still get all the data.

(It's kind of hard to explain without a whiteboard.  Let me know if that makes sense.

I think that camera JAI you cited above is a linear scan camera... you need to change the 'ScanType' in the 'CGI' camera 'Area' file, and you may need to adjust the size of the image in order to acquire this camera.

Let me know how it works.

Robert, do you see value DMA - including the alpha in an ordinary RGB image plan?  I don't think that there is a way to pull the plane an image color in LabVIEW alpha, but I could be wrong.

-Daniel

PS The forum wouldn't let me upload a file .icd (unknown extension).  Download the .txt file and rename it to your hard drive.

Tags: NI Hardware

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