Using Logitech QuickCamPro 9000 -- custom VI for ScreenCapture from

[iowa]

Using Logitech QuickCamPro 9000 -- have problem with quality of the outputted pictures

1) Using Logitech QuickCamPro 9000

2) Created VIs (attached as QCP9000.ScreenCapture.zip)

SMU_Driver.zip

3) Take a look on: "QCP9000 Snapshot.vi"

-- When using this VI the outputted picture are of corrupted quality See attached: "QCP9000 - picture.from.VI.JPG"

-- while actual WebCam picture is crystal clear. See attached: "QCP9000 - picture.from.WebCam.JPG"

I don't know what I have done wrong in my "QCP9000 Snapshot.vi".

Please let me have your expert feedback or ideas for improvement.

Thank you,

Alex

By the way this camera is Low cost and of amazing quality (for the price):

Logitech QuickCam® Pro 9000 -- <http://www.logitech.com/index.cfm/webcam_c...56&cl=us,en#>

The one with image-perfect detail and clarity. Carl Zeiss® optics and autofocus keep images razor-sharp, even in extreme close-ups.

Technical Specifications

Carl Zeiss® lens - German Optics!

Autofocus system

Ultra-high resolution 2-megapixel sensor with RightLight™2 Technology

Color depth: 24-bit true color

Video capture: Up to 1600 x 1200 pixels (HD quality) (HD Video 960 x 720 pixels)

Frame rate: Up to 30 frames per second

Still image capture: 8 million pixels (with software enhancement)

Built-in microphone with RightSound™ Technology

[crelf]

QUOTE (iowa @ Sep 10 2008, 01:08 AM)

2) Created VIs (attached as QCP9000.ScreenCapture.zip)

You wrote the VIs? Did you write the DLL too? Can you tell us where to get it (or maybe upload it)?

Do you know about the free http://sine.ni.com/nilex/DisplayLinkAction.do?id=163NILEX' target="_blank">NI-IMAQ for USB Cameras toolkit?

[sam]

You are not parsing the [Rows] in [image Array] correctly if my memory serves correctly. From the picture it seems that you are for example taking every other pixel,which will give you a compressed stubby image.

[iowa]

QUOTE (sam @ Sep 10 2008, 05:25 PM)

You are not parsing the [Rows] in [image Array] correctly if my memory serves correctly. From the picture it seems that you are for example taking every other pixel,which will give you a compressed stubby image.

How do I fix it?

Thank you,

Alex

[sam]

The problem resides in the Driver that you are using. You should ask the creator of the driver. Another thing I can think of is playing the bit count, 8, 16, 14, 24 ....

if you can not change the driver, you can rearrange the array yourself as I can see that you are getting the image array and saving it to file. Remember the Array is in RGB. and use ArrayInterleave and ArrayDecimate.

QUOTE (iowa @ Sep 10 2008, 03:11 PM)

How do I fix it?

Thank you,

Alex

[iowa]

QUOTE (sam @ Sep 10 2008, 10:09 PM)

The problem resides in the Driver that you are using. You should ask the creator of the driver. Another thing I can think of is playing the bit count, 8, 16, 14, 24 ....

if you can not change the driver, you can rearrange the array yourself as I can see that you are getting the image array and saving it to file. Remember the Array is in RGB. and use ArrayInterleave and ArrayDecimate.

Nice ideas.. Thank you.

http://lavag.org/old_files/monthly_09_2008/post-12065-1221083262.jpg' target="_blank">

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[Irene_he]

You can also check what is the webcam's color space, is it RGB or YUV or any other format. That will also affect your output image data array. You can play to select RGB format (Logitech usually always provide this format), see if results are better.

Irene