Question

Consider a digital system that gives visually impaired an awareness of their surroundings. The system will detect objects and provide real-time feedback to the user according to the size, position and distance of the object. In addition, the system should detect street signs and posts.

1. Create the main engineering requirements for this system. (5 marks)

2. Based on the requirements, develop test cases for Unit Testing, Integration Testing and Acceptance Testing.

Hint: The order of the tests are from Unit to Acceptance tests.

Answer 1

1)The main engineering requirements for a digital system which gives visually impaired

an awareness of their surroundings is,

> For detecting target size, position and distance of the object we need to use radar.

> To detect street signs and posts we need to use Camera and image processing algorithms.

2)If we have all the above required devices

> Test cases fot unit testing

According to the configuration used radar will generate frames. By the reflections

from the object we Can find the distance.

It should detect multiple targets with accurate distance measurements

similarly, camera unit and corresponding

image Processing algorithm should clearly distinguish between Red, green and yellow signals

> Integration testing

Radas and Camera units are twod different units. while we integrate them Performance should be same.

Acceptance test

Finally the entire digital system is acceptable only if it detects all the targets without missing

any one.It should not miss predict then only then only the entire device is acceptable.