Turn on suggestions
Auto-suggest helps you quickly narrow down your search results by suggesting possible matches as you type.
Showing results for
Topic Options
- Subscribe to RSS Feed
- Mark Topic as New
- Mark Topic as Read
- Float this Topic for Current User
- Bookmark
- Subscribe
- Mute
- Printer Friendly Page
Odd and even field are very different from each other even though the object is not moving
miethe
Member
06-08-2007 10:13 AM - edited 06-08-2007 10:13 AM
Options
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report to a Moderator
hi,
even though the object I am imaging with an analog camera is not moving, I get lines that reminicent of an image of a moving object, where the interlacing of the odd and the even field causes double exposure. This is the most obvious in the areas of the image with a change from a dark to a light part.
One way to solve this problem is to only use one field and multiply the vertical enlargement by 2. But this way I am loosing part of the information.
the attachments give jpgs of
o the interlaced frame with a vertical expansion of 3 -> lines
o the even field only with a vertical expansion of 6 -> smooth image with less information
This problem started arrising when I changed from Labview 7.1 to 8.2, but using the older version of the program with 7.1 gives the same problems.
I am using a PCI 1405 framegrabber with a JAI A50 camera
The sensitifity of the two fields seems to be different. Is there any way to correct this?
regards,
miethe
even though the object I am imaging with an analog camera is not moving, I get lines that reminicent of an image of a moving object, where the interlacing of the odd and the even field causes double exposure. This is the most obvious in the areas of the image with a change from a dark to a light part.
One way to solve this problem is to only use one field and multiply the vertical enlargement by 2. But this way I am loosing part of the information.
the attachments give jpgs of
o the interlaced frame with a vertical expansion of 3 -> lines
o the even field only with a vertical expansion of 6 -> smooth image with less information
This problem started arrising when I changed from Labview 7.1 to 8.2, but using the older version of the program with 7.1 gives the same problems.
I am using a PCI 1405 framegrabber with a JAI A50 camera
The sensitifity of the two fields seems to be different. Is there any way to correct this?
regards,
miethe
Message Edited by miethe on 06-08-2007 05:14 PM
Download All
Virus scan in progress. Please wait to download attachments.
DOC-doc
Active Participant
06-08-2007 10:32 AM
Options
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report to a Moderator
Hi Miethe,
I would say that this is a hardware problem, something with your drivers : when you updated to Labview 8.2, you got labview 8.2 drivers and cannot got back to the labview 7.1.
So now you have to fight to find the right hardware configuration :
check you have the latest versions of the camera files for your model, and update them if necessary.
To test if the problem comes from the drivers and camera file, run MAX : if you can get a good picture, it means the problem comes from your soft.
Cheers
I would say that this is a hardware problem, something with your drivers : when you updated to Labview 8.2, you got labview 8.2 drivers and cannot got back to the labview 7.1.
So now you have to fight to find the right hardware configuration :
check you have the latest versions of the camera files for your model, and update them if necessary.
To test if the problem comes from the drivers and camera file, run MAX : if you can get a good picture, it means the problem comes from your soft.
Cheers
06-11-2007 07:05 AM
Options
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report to a Moderator
Hi doc-doc,
thanks to your help I could solve the problem. I checked the drivers. I already have the newest driver: NI-IMAQ 3.7.
It turned out that I had not initialized for the right camera file in MAX. This is something I did when I first got the camera. The camera file got disconnected by updating to 8.2 . I selected it by left clicking on your camera in MAX under the IMAQ card and selecting
thanks to your help I could solve the problem. I checked the drivers. I already have the newest driver: NI-IMAQ 3.7.
It turned out that I had not initialized for the right camera file in MAX. This is something I did when I first got the camera. The camera file got disconnected by updating to 8.2 . I selected it by left clicking on your camera in MAX under the IMAQ card and selecting
Open Camera and choosing the right camera file.
All the stripes are gone now and the problem is solved.
thanks again
Miethe
DOC-doc
Active Participant
06-11-2007 10:16 AM
Options
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report to a Moderator
My pleasure to help you !
