Project-5.pdf

Department of Electrical Engineering and Computer Science

CIS/EEC 693

Computer Vision

Summer 2021

Project 5

(Due date: 06/16/2021)

In many of computer vision applications, the gray levels of pixels belonging to the object are

substantially different from the gray levels of the pixels belonging to the background. Therefore,

image thresholding technique is instrumental to the success of many image processing

applications. As the input images might be taken at different times of the day, a fixed threshold

may not work for different illumination conditions. For this reason, an adaptive thresholding

method needs to be incorporated automatically. Otsu has developed a comprehensive statistical

technique to find the best threshold for an image. He proposed a criterion for maximizing the

between-class variance of pixel intensity to perform image thresholding. This method is accurate

for images which contain two distinct classes. On the other hand, to efficiently find the optimal

threshold the adaptive progressive thresholding (APT) approach is used as an extension of the

Otsu’s technique.

1. Write a program to implement the Otsu’s adaptive thresholding technique. Obtain the
optimum threshold for segmenting the region of interest (dark object region with respect to a

bright background) and create a binary image. Test and evaluate the algorithm on sample

images of different types (single object, multiple objects, different lighting and backgrounds

etc., see Project-Data)

2. Write a program to implement the adaptive progressive thresholding (APT) technique.
Obtain the optimum final threshold for segmenting the region of interest (dark object region

with respect to a bright background) and create a binary image. Test and evaluate the

algorithm on sample images of different types (single object, multiple objects, different

lighting and backgrounds etc., see Project-Data)

Notes:

• The project should be implemented in Python.

• Only one single file should be submitted through Blackboard for evaluation, which includes:

✓ The project report that includes the methodology, equations used, implementation
results and discussion, conclusion, appropriate technical references, etc.

✓ The program codes along with the dataset used for testing and validation.

• Late submissions will not be accepted.
• Email submissions will not be accepted.