Font size
WorksheetsCVP_E
Total questions: 61
Worksheet time: 42mins
Visible Light
430nm - 700nm
400nm - 750nm
450nm - 750nm
200nm - 1100nm
The light is represented as...
Particles
Frequency
Electromagnetic waves
Particles and Electromagnetic Waves
Light photons hitting a Silicon surface will dislodge electrons
Number of electrons released depends on intensity and wavelength
That is a...
(a)
60% QE = For every _ photons hitting a pixel, _ electrons are released
Write answer X,Y
(a)
CCD/CMOS
CMOS/CCD
CDD/CMOS
Imagers are Voltage Driven Devices
Light striking the pixel creates a voltage proportional to intensity
The voltage is sampled directly at the pixel, digitized on the imager and cleared for the next frame (picture)
The imager has a completely digital output
CMOS
CCD
Microlenses increase the photon collection area of the pixel and focus the photons into the photosensitive area (Good “Fill Factor” ) . All CCD designs use microlenses (Color & Monochrome )
What are the pros and cons of using microlenses?
A- Effectively increases the quantum efficiency of the pixel
B- Creates and angular sensitivity to the incident light ray
A - Con
B - Pro
A - Pro
B - Con
Horizontal lines are shifted down the sensor. Pixels are read out from a horizontal shift register through a common circuit. What kind of sensor is it?
(a)
What are the main problems of CCD?
(a)
A - It’s caused by pixels becoming saturated, and light spilling over into the vertical shift register while clocking out
B - Is known as the spread of charges to adjacent pixels due to over saturation of pixels. This makes some very bright spots in the image.
A - Blooming
B - Smearing
A - Smearing
B - Blooming
Allow exposure of the whole frame at the same time.
(a)
Which image was taken with Global Shutter?
A
B
What type of sensor works with Voltage?
CMOS or CCD
(a)
What type of lens format is ideal for a 1/8” sensor?
1/5”
1/3”
1/10”
1/8”
What are the two most common types of lens mounts on industrial vision systems?
(a)
Interlaced scanning
Scanning of first line, second line, third line, etc… until the entire frame is scanned
Scanning of odd-numbered lines, then scanning of even-numbered lines. Both fields are then combined to form the entire frame.
Spatial Noise
“Fixed Pattern Noise.” Constant non-uniformities in the image caused by bad sensor design, electrical noise, etc.
Anything besides light that causes a pixel’s value to change over time (temperature, ADC errors, etc.).
Shot Noise / Photon Noise
Dark Current Noise
Quantization Noise
Spatial Noise Examples
Temporal Noise Examples
The rate at which electrons are produced due to thermal effects.
How is this example of Temporal Noise known?
(a)
Bad sensor design and EMI are a Some Sources of...
(a)
The ratio of good signal caused by light to unwanted noise. What is the most important measure to know the quality of an image?
(a)
Industry standard for measuring image quality of digital cameras.
(a)
Type of software-level control you can manipulate on a camera to affect image quality
Gain
Exposure
Brightness
All
If you have a low light image, what can you do "first" to correct it?
(there may be more than one correct answer)
Exposure
Focus
Gain
Light intensity
F number
The length of time that the sensor is open for collecting ligh
(a)
The 1-bit image has 2 pixel values available and 8 bits has _ pixel values available
(a)
The measure of how well a camera can represent details when both bright and dark areas are present
Gain
Signal To Noise Ratio
Dynamic Range
All
Camera Link, Camera Link HS, GigE Vision, USB3 Vision, GenICam, CoaXPress, and IIDC2 are the 7 standard communication interfaces of a camera.
True
False
If it is necessary to have high speed and data transmission reliability, would you use Camera Link HS or Camera Link?
Camera Link HS
Camera Link
Area Scan
1CCD/3CCD
3CCD/1CCD
What kind of architecture of a linear scan is it?
(a)
What kind of architecture of a linear scan is it?
(a)
The Prism-Based Technology is one of two types of linear scans that exist. What is the other?
(a)
Camera positioned off-axis to the inspected object creates unwanted halo effects (distortion in color registration). Different magnification for all spectral bands.
Drawback of tri-linear technology
Advantages of prism technology
Drawback of prism technology
Advantages of tri-linear technology
Reflected light is separated by wavelength through the optical beam splitter and sent to independent RGB CCD sensors simultaneously.
As a result, all CCDs capture the exact same point of the object at the same time.
What type of color line scan is it?
(a)
If you want to inspect a cylindrical object with a color line scanning camera, which camera would you choose?
Tri-Linear Camera
Prism-Based Linear Camera
Industrial PC-based, Smart Cameras/Smart Sensor and Hybrid Smart Camera, are the 3 types of ______ ______ that we can find in the market
(a)
How many pixels are needed?
Sub-pixel resolution must be X/Y th the desired tolerance
X = 100
Y = 1
X = 1
Y = 100
X = 1
Y = 10
X = 10
Y = 1
How many pixels are needed?
- Feature differentiation
Min. 3x3
Min. 8x8
Min. 2x2
Min. 5x5
How many pixels are needed?
- Feature location
Min. 6x6
Min. 3x3
Min. 4x4
Min. 5x5
How many pixels are needed?
- Defect detection
Min. 5x5
Min. 7x7
Min. 4x4
Min. 2x2
What kind of lens would you use to "eliminate" perspective?
(a)
What type of Lighting Techniques is it?
Diffuse dark-field
Diffuse bright-field
Direct dark-field
Direct bright-field
What type of Lighting Techniques is it?
(a)
• Sources: Focused LED linear array, focused or patterned lasers
• Uses: highlight geometric shapes, create contrast based upon shape, provide 3D information in 2D images
What type of Lighting Techniques is it?
(a)
• Sources: directed, diffused LED or fiber optic area
• Uses: produce more even illumination on specular surfaces, may reduce low contrast surface features, may highlight high-contrast geometric surface features depending on reflective angle
Diffuse backlight
Coaxial
Structured light
9 Generals Machine Vision Algorithms:
– Image transformation/geometric manipulation – Image enhancement/preprocessing – Connectivity – Edge Detection – Correlation – Geometric Search – OCR/OCV – Color processing
Which one is missing?
(a)
A- Scene
B- Sensor Size
C- Focal Length
D- Optic/Lens
E- Work Distance
A- Scene
B- Optic/Lens
C- Sensor Size
D- Focal Length
E- Work Distance
Work Distance (WD)
The ratio between the sensor size and the FOV
The distance from the front of the lens to the object
The maximum object depth that can be maintained entirely in focus
The ratio between the sensor size and the FOV
Depth Of Field (DOF)
Primary Magnification (PMAG)
Resolution
Describes the separation in intensity between blacks and whites.
(a)
Are capable of on-board processing
analog camera
digital camera
If you have to read a code on a cellophane surface, what lighting technique would you use?
Co-Axial Diffuse
Bright Field
Dark Field
Erosion or dilatation?
Erosion with connectivity 4
Dilatation with connectivity 4
Dilatation with connectivity 8
Erosion with connectivity 8
The maximum number of electrons that register a signal in a pixel
(a)
Number of electrons released depends on...
Wavelength
Intensity
Intensity and wavelength
Neither
What is the storage capacity of electrons in a pixel:
A - electrons – Small pixels
B - electrons – Medium pixels
C - electrons – Large pixels
A = 50,000
B = 10,000
C = 4,000
A = 5,000
B = 10,000
C = 50,000
A = 400
B = 1000
C = 5000
A = 4,000
B = 10,000
C = 50,000
What is the light particle called?
(a)
In a telecentric lens, if we vary the working distance, the magnification remains
True
False
You have to do a reading of a code, on a surface with cellophane, what lighting technique would you use?
Co-Axial Diffuse
Structured Light
Diffuse Backlight
What type of code allows to store more information?
1D CODE
2D CODE
