Essentials of Digital Image Processing

Aug 21, 2024

Digital Image Processing Lecture Notes

Introduction

  • Overview of digital image processing.
  • Focus on multiple choice questions related to the basics of image processing.

Key Questions and Answers

Question 1: Fast, Precise, and Flexible Technique

  • Correct Answer: Digital image processing is the technique that is fast, precise, and flexible.

Question 2: Image Function A(x,y)

  • A represents: Amplitude of the image.
  • X and Y: Spatial coordinates.
  • A(x,y) represents: Intensity level (amplitude).

Question 3: Define Pixel

  • Definition: Pixel is the element used to represent a digital image.

Question 4: Grayscale Dynamic Range

  • Correct Term: Dynamic range spanned by grayscale.

Question 5: Number of Gray Values

  • Correct Option: Integer power of 2.

Question 6: First Step in Image Processing

  • Correct Answer: Image acquisition.

Question 7: Size of Monochromatic Television Image

  • Typical Size: 512 x 512.

Question 8: Next Step After Compression

  • Correct Answer: Morphological processing.

Question 9: Step Before Color Image Processing

  • Correct Answer: Image restoration.

Question 10: Total Steps in Image Processing

  • Total Steps: 10 steps.

Question 11: Function of Segmentation Unit

  • Correct Answer: Partitioning an image into constituent parts or objects.

Question 12: Process of Assigning Meaning to Objects

  • Correct Term: Interpretation.

Question 13: Resolution Calculation

  • Resolution of 1024 x 1024 Images: Multiply (result in C).

Question 14: Value of k

  • Given: L = 2^k; Total levels (L) = 8.
  • Calculated: k = 3.

Question 15: Display of Digital Images

  • Displayed as: Discrete set of intensities.

Question 16: Definition of m and n in Image Size

  • m: Number of rows.
  • n: Number of columns.

Question 17: Meaning of DPI

  • DPI stands for: Dots per inch.

Question 18: Bit Required to Encode Pixel Value

  • Known as: Bit depth.

Question 19: Bits Required to Store an Image

  • Calculation Formula: m x n x k (size of image).

Question 20: Color Attribute Describing Pure Color

  • Correct Term: Hue.

Question 21: MRI in Imaging

  • MRI stands for: Magnetic resonance imaging.

Question 22: Output of Image Sensors

  • Produces: Voltage waveform.

Question 23: Representation of Black and White Pixels

  • Matrix: Black = 0, White = 1.

Question 24: Computer Generated Images

  • Known as: Synthetic images.

Question 25: Intensity Levels in 8-bit Images

  • Total Levels: 2^8 = 256.

Question 26: Digitizing an Image

  • Required Steps: Sampling and quantization.

Question 27: Sampling Definition

  • Defined as: Digitizing along the coordinate plane.

Question 28: Quantization Definition

  • Defined as: Digitizing the amplitude value.

Question 29: Quality of Digital Image

  • Determined by: Number of samples and discrete gray levels.

Question 30: Notation for Adjacent Component

  • Notation 0 1 signifies: Next adjacent component, second sample along the first row.

Question 31: Bit Calculation for Digital Image

  • Given: m = n = 32; L = 16; Total Bits = 4096.

Question 32: Measure of Pure Color Dilution

  • Correct Term: Saturation.

Question 33: Image Processing Step for Extracting Components

  • Correct Answer: Morphological processing.

Question 34: Labeling Objects in Image Processing

  • Correct Step: Object recognition.

Question 35: Rows in Digital Image

  • Known as: Vertical resolution.

Question 36: Type of Image with Artificial Colors

  • Known as: Pseudo color images.

Question 37: Bits Required for True Color Image

  • Total Bits: 24 bits.

Question 38: Storage Requirement for Binary Image

  • Calculation: 1024 x 1024 binary image = 1048576 bits (A is correct).