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Introduction

Image processing is a powerful tool that allows us to manipulate and enhance digital images in various ways. One common technique used in image enhancement is contrast stretching, thresholding, and clipping. These techniques are employed to improve the visual quality of images by adjusting their brightness and contrast levels.

Contrast Stretching

Contrast stretching is an Image Enhancement method which attempts to improve an image by stretching the range of intensity values.

A Contrast Stretching Transformation can be achieved by:

1. Stretching the dark range of input values into a wider range of output values: This involves increasing the brightness of the darker areas in the image to enhance details and improve visibility.

2. Shifting the mid-range of input values: This step involves adjusting the brightness levels of the mid-tones in the image to improve overall contrast and clarity.

3. Compressing the bright range of input values: This process involves reducing the brightness of the brighter areas in the image to prevent overexposure and highlight clipping, resulting in a more balanced and visually appealing image.