Digital Image Processing Important Questions

UNIT – I
DIGITAL IMAGE FUNDAMENTALS & IMAGE TRANSFORMS

Part-A--Two Mark Questions:

1. Define Image.How do you represent the digital images?
2. Define Pixel or picture elements.
3. Steps in DIP.
4. Elements of DIP.
5. Brightness adaptation and discrimination.
6. Difference between rods and cones.
7. Weber ratio
8. Mach band effect
9. Simultaneous contrast
10. List the hardware-oriented color models.
11. Sampling and quantization
12. Zooming and shrinking.
13. Moiré pattern
14. False contouring
15. Dither
16. Checker board effect

Part--B-Big Questions:

1. List the steps involved in digital image processing
2. Elements or components of DIP
3. Elements of Visual perception
4. Digital camera & Vidicon camera
5. Image sampling and quantization (How an analog image can be converted to digital?)
6. Image Sensing and acquisition devices 
   
   

UNIT – 2

Two Mark Questions:

1. Define image enhancement.
2. Gray level transformation
3. Contrast stretching & gray level slicing.
4. Thresholding
5. Histogram
6. Histogram equalization & specification
7. Smoothing filter
8. Sharpening filter
9. Spatial filter
10. Derivative filter types
11. Robert cross, Prewitt & Sobel operators
12. Unsharp masking
13. High boost filtering
14. Frequency domain filtering
15. Homomorphic filtering

Big Questions:

1. Histogram equalization
2. Histogram specialization
3. Spatial smoothing filter: Linear & Non-Linear
4. Spatial sharpening filter
5. Homomorphic filter

UNIT -3

Two Mark Questions:

1. Draw image degradation model.
2. Median filter
3. Order statistics filter
4. Inverse filtering
5. Wiener filtering/ LMS filtering
6. Blind image restoration
7. How edges are detected in an image?
8. Zero crossing property
9. LoG/Mexican hat function
10. Thresholding
11. Region growing, splitting and merging
12. Watershed segmentation
13. Catchment Basin (or) Watershed
14. Markers
15. How dams are constructed in watershed?
16. Drawbacks of Watershed

Big Questions:

1. Image restoration/degradation models
2. Spatial restoration filters: Mean, Order statistics and Adaptive
3. Frequency restoration filters: Band reject, Band pass, Notch and Optimum Notch
4. Restoration filter: Inverse and Wiener/LMS filters

UNIT-4

Two Mark Questions:

1. What is the need of Wavelet Transform?
2. What is MRA?
3. Difference between Lossless and Lossy compression.
4. Types of redundancy& its definition
5. Define compression ratio
6. Define block and instantaneous code
7. Huffman coding
8. Arithmetic coding
9. JPEG
10. MPEG
11. I – frame, P- frame and B-frame definition
12. Zig-Zag sequence
13. Vector quantization

Big Questions:

1. Lossless predictive coding
2. Lossy predictive coding: Vector quantization and transform coding
3. JPEG: Encoder& Decoder
4. JPEG 2000
5. MPEG

UNIT-5

Two Mark Questions:

1. Define chain codes
2. Define polygonal approximation
3. Define boundary segment
4. Name few boundary descriptors
5. Define shape numbers
6. Define texture
7. Define pattern and pattern class
8. Define regional descriptors
9. Topological descriptors
10. Fourier descriptors

Big Questions:

1. Chain codes
2. Polygonal approximation and MPP algorithm
3. Signature and boundary segments
4. Regional descriptors & topological descriptors
5. How the tree approach is used to describe different regions of an image?