I want to buy NI cam for my machine vision system

Question

Dear member
I need to buy a NI cam to use it in my machine vision system that is used to in recognition of screws head like in second figure
the problem is that my web cam is not able to produce high quality image
so I need no but NI cam high quality
I need only  NI cam  with USB cable, not a  NI smart cam with processor
what is your suggestion please??
best regards
hi ?Q>

Answer 1

AdnanZ wrote:
For your industrial machine vision application, you would be better off with an industrial protocol like the Gigabit Ethenet (GigE) or USB 3.0 cameras. You should have a look at Basler's Ace line of cameras (scroll down and have a look at the Gigabit Ethernet and USB 3.0 tabs).
Althought there are advantages to USB 2.0 (cost effectiveness, USB 2.0 ports available everywhere), it is still the least standardized and least popular camera bus considered. The one obstruction to the widespread adoption of USB 2.0 for vision applications is the lack of a hardware specification for video acquisition devices. Each vendor has to implement its own hardware and software design, which means that a special driver must be written to connect each USB 2.0 camera to each different software package. As a result, IEEE 1394 is much more prominent in vision applications. Also, most image acquisition drivers for USB 2.0 use utilities like DirectShow to acquire images into the PC. While these tools work well, they are a burden on the CPU. As a result, USB 2.0 image acquisition can be processor-intensive. Utilities like DirectShow also do not provide any type of interface for triggering or communication. Because of this, without a special driver, it is very difficult to synchronize USB cameras with each other or the rest of a system.
GigE Vision and USB 3.0 Vision are built to avoid this (by using GenICam) and are supported by National Instruments' Vision Acquisition Software. If you have to choose between GigE and USB 3.0, just remembe that GigE is good for longer cable lengths (100m v/s 8m for USB 3.0) and works well with multiple camera. Otherwise, USB 3.0 has better bandwidth (350MB/s v/s 125MB/s for GigE) and is plug and play (no extra power required).
Before you choose the camera, try to undestand what resolution and fps you need depending on your application, and then select the camera.
To get the right lens, you need to know the CCD size of the camera, and working distance and field of view of the object. Working Distance is the distance from the front of the lens to the object and Field of View (fov) is defined by the smallest rectangle of sides x and y which contains the object at the object plane. You need to use these to calculate the focal length and then choose the right lens.
Also, be sure to select the right lighting. Metaphase has some good products.
Wherever you are based, you should be able to find a local vendor for the camera, lens and lighting. Be sure to do the due diligence. You should, then, be able to get a good image for your application.
thank for your information share
is CCD size=pixel size?? what ccd mean ,is thier other type,what ccd advantage??
also
i have buy camera with specific focal length then if i add lens with 14 mm focal is the total length will default focal+lens focal (14)?
what is the effect of focal length and pixel size on images??
best regards
hi ?Q>