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Image Processing Lab Tasks

Task 1: Grayscale Image Operations

(a) Decrease Spatial Resolution

• Take a grayscale image of size 512x512.
• Decrease its spatial resolution by half every time.
• Observe changes when displaying in the same window size.

(b) Decrease Intensity Level Resolution

• Decrease intensity level resolution by one bit up to reach its binary format.
• Observe changes when displaying in the same window size.

(c) Illustrate Histogram & Single Threshold Segmentation

• Illustrate the histogram of the image.
• Perform single threshold segmentation observed from the histogram.

Task 2: More Grayscale Image Operations

(a) Brightness Enhancement

• Take a grayscale image of size 512x512.
• Perform brightness enhancement of a specific range of gray levels.
• Observe the result.

(b) Power Law & Inverse Logarithmic Transformation

• Differentiate the results of power law & inverse logarithmic transformation.

(c) Find Difference Image

• Take a grayscale image.
• Find the difference image between the original & the image obtained by the last three MSBs.

Task 3: Image with Salt-and-Pepper Noise

(a) Average & Median Spatial Filters

• Apply average & median spatial filters with a 5x5 mask.
• Observe their performance for noise suppression in terms of PSNR.

(b) Average Filter with Different Mask Sizes

• Apply an average filter with (3x3, 5x5, 7x7) mask.
• Observe its performance in terms of PSNR.

(c) Harmonic & Geometric Mean Filter

• Apply harmonic & geometric mean filter on the noisy image.
• Compare their performance with PSNR.

Task 4: Image with Gaussian Noise

(a) Frequency Domain Filtering

• Apply 4th order Butterworth & Gaussian low-pass filter.
• Analyze their performance quantitatively.

(b) Ringing Effect of Ideal Low-Pass Filter

• Display the ringing effect of the ideal low-pass filter of different radii on the image.

(c) Edge Detection

• Perform edge detection on the noisy & clean image using ideal & Gaussian high-pass filters.

Task 5: Binary Image Morphological Operations

(a) Erosion & Dilation

• Perform Erosion & Dilation operations.

(b) Opening & Closing

• Perform Opening & Closing operations.

(c) Boundary Extraction

• Extract boundaries using morphological operations.