Benefits of Digital
Digital camera technologies and standards offer equivalent and superior camera options compared to analog cameras. In general, with digital standards, you can
- Use sensors with higher resolution, frame rates, and pixel depth
- Perform partial image sensor readouts
- Configure camera attributes more easily
- Synchronize and integrate inspections with lower latency
- Interconnect cameras through hubs
Choosing a Digital Standard
You can choose from a variety of digital standards. Table 1 compares the digital options to analog.
Table 1. Comparison of Analog with Digital Technologies
How the Change Affects Application Software
When moving from analog to digital cameras, consider how the following two options may affect your application software code:
- Option A: Camera Link, which also uses NI-IMAQ image acquisition drivers, so it requires minimal changes, if any, to code.
- Option B: Consumer buses that use NI-IMAQdx, which is a separate driver, but, as you can see from the diagrams below, it features a one-to-one correlation with NI-IMAQ driver functions.
Figure 2. The One-to-One Correlation between the NI-IMAQ and NI-IMAQdx Drivers as Seen through the Similarities in the LabVIEW Function Palettes
Figure 3. This LabVIEW VI is performing image acquisition and thresholding using (a) NI-IMAQ and (b) NI-IMAQdx.