Image to Sketch Converter

This Python script converts a given image into a pencil sketch using image processing techniques. It utilizes the numpy, imageio, scipy, and cv2 (OpenCV) libraries to achieve this effect.

Features

• Convert any image into a sketch using a few lines of Python code.
• The script uses grayscale conversion, image inversion, and Gaussian blurring to produce a realistic sketch effect.

Requirements

To run this script, you need to install the following Python libraries:

• numpy
• imageio
• scipy
• opencv-python

You can install them using pip:

pip install numpy imageio scipy opencv-python

How It Works

1. Grayscale Conversion: The script converts the image into grayscale using a weighted sum of the RGB channels.
2. Image Inversion: The grayscale image is inverted to create a negative effect.
3. Gaussian Blurring: The inverted image is blurred using a Gaussian filter to create a smooth transition between the light and dark areas.
4. Dodge Blending: The blurred image is combined with the original grayscale image using the Dodge blend technique, which results in a pencil sketch effect.

Usage

Place the image you want to convert into the same directory as the script and rename it to dog.jpg or change the img variable in the script to the image's filename.

Run the script:

python image_to_sketch.py

The output will be saved as sketchDog.png in the same directory.

Demo

What's Next?

Feel free to experiment with different images, tweak the Gaussian blur intensity, or even build a graphical user interface (GUI) to make the tool more user-friendly. The possibilities are endless—get creative and make this project your own!