What is a Pepper Noise ?
Pepper noise, on the other hand, refers to random black spots or pixels occurring in a digital image. These pixels always possess the minimum intensity value of 0 as it does in an 8-bit grayscale image. Pepper noise is a type of noise that appears in digital images, similar to salt noise and is discussed together as “salt-and-pepper noise.” Specifically, pepper noise refers to the presence of black pixels (minimum intensity) scattered randomly throughout an image. In a grayscale image, pepper noise results in random pixels being turned to black (0) regardless of their original values.
Explanation: This image shows black pixels randomly distributed over the original image, representing pepper noise.
Types of Pepper Noise
- Isolated Pepper Noise: Occasionally very few black pixels can be found spread irregularly over an entire picture.
- Clustered Pepper Noise: In this form, bunches of black pixels are noticed forming aggregates there.
Difference between Salt Noise and Pepper Noise
Digital picture handling includes the unwanted alteration of pixel values in an image which degrades the visual quality and interferes with image analysis. Several types of noise are found in digital images with “salt-and-pepper noise” being one of them, often caused by mistakes during data transmission or when capturing pictures. This type of noise manifests as random white or black pixels on an image that look like salt and pepper sprinkled over it.
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