how to estimate the CPU speed and RAM for an Imaging system

[zma2007]

Hi, everybody..

I am new to this forum and also very new to Machine Vision Field..

Pls help me..

We are developing a machine vision system  for industrial application. The basic function will be saving the image,saving video, displaying real time image and also saved image and videos. We will add some basic measurement functios later. So, for this kind of simple applicatios, we intend to use Single Board computer with appropriate camera. However, we are lack of idea to choose the camera and aquisition system. And hoping that I will some idea from this forum...
**Is there a way to evaluate the minimum specifications for the aquisition hardware for eg. CPU speed, video memory, RAM, etc..?
**example, if we use 1.3 megapixel RGB USB camera, and would like to display 30 fps, how can we calculate the CUP speed needed and RAM needed for such kind of system?
**if we use other camers, FireWire GigE or Camera Link or Analog Camera, how can we calculate the specs?
**Any idea of how to choose appropriate camera?

zma2007

[DOC-doc]

Hi,

For the RAM size it is easy : 1 image in your case is around 4 Mo. I guess you can do you application with around 10 image (including 1 for display), which means 40 Mo. Plus say 20 Mo for the appplication and data and you are around 60 Mo.

To optimize the CPU speed :
1 - if you use a USB, or regular firewire, it will take around 60 to 70 % of CPU load to acquire and display at 30 FPS for a 2 MHz CPU with integrated VideoCard.
2 - If you use the NI firewire card or Cameralink card, they do DMA access and you get your picture 30 fps 1.3 Mpix for less than 10%, depending on the videocard.

So in you case, if you want to save the images and video, I would go with a NI firewire card (maybe IEEE1394b), and chose a high speed Hard drive.

Cheers