Practice Flashcards
When viewing specular surfaces with a light, the angle of reflection of light is equal to the angle of _____?
Incidence
Based on the equation for the smallest achievable spot size (d) of a lens – d=2.44lambdaf/#, what happens to the spot size as the wavelength decreases?
AI in machine vision systems often refers to?
What can affect the performance (resolution) of a lens in the real world?
Wavelength
F/#
Working Distance
All of the above
Key prerequisite(s) in advance of performing the machine vision systems design are?
1.Preparing functional requirements and system requirements
2. Developing a preliminary bill of materials.
3. Selecting Vendors for key components.
4. ID specific image processing tools for the application
What is one disadvantage of using a color image with a Bayer Color filter pattern?
- Not true color
- Color interpolation is needed
- Each pixel has just one color
- Spectral response depends on the design
When capturing an image of a still scene, you find it to be a bit dark. What camera parameter should you increase first to increase the brightness of the image, but keep the best quality?
Exposure
What is spatial calibration?
- Allows user to take real measurements from image based on pixel locations.
- Corrects for distortions introduced by lens and camera position.
When imaging diffuses red print on a white diffuse background, such as paper, green LED illumination will generally produce?
In managing a machine vision project, how many sample parts are required for a successful design?
LED illumination sources for machine vision….
- T1 3/4 the standard
- Surface mount
- High current
Which of the following changes as the f# is changed on a lens?
- Depth of Field
- Light throughput
- MTF
- All of the above
What makes a lens “object space telecentric”?
Chief Rays are parallel
Out of the following Digital camera interfaces, which has the highest potential bandwith?
Camera Link HS
