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CS105 Fundamentals of Artificial Intelligence
Group-project for Tangram Piece Matching and Recognition
Tangram is one of the most popular games to play with. You put figures of 7 pieces together (five
triangles, one square and one parallelogram). You must use all pieces. They must touch but not
overlap.
All seven tangram pieces consist of half square with this shape:
There are 32 half squares or 16 squares altogether. We could take the half triangle as the basic form, because the square built of all seven tangram
pieces has the simple length 4. There are only 13 convex figures that you can build from tangram pieces.
In this project, you are required to use AI search methods (uninformed search methods such as
Breadth First search, Depth First search, Iterative Deepening and Uniform Cost search) and
(Informed or heuristic search methods such as Greedy search, A* algorithm and Iterative Deepening
version of A* : IDA*) to perform pattern matching and recognition. For some figures, there are more
than one goal states that could be reached. You are given all these 13 figures with no lines drawn
inside each figure, i.e., they are figures with boundaries only (black box figures). You jobs are given
as follows:
1. Divide each figure into 32 half-square (triangle) areas, please consult “Tangram Convex Figures”. 2. Group these 32 areas into 7 larger areas: five triangles, one square and one parallelogram. The
area ratios should be 8:8:4:2:2:4:4 =4:4:2:1:1:2:2 =LT:LT:MT:ST:ST:SQ:PA
3. Setup problem formulation that is most suitable for solving this problem.
4. Use at least TWO uninformed and at least TWO informed search methods to solve this problem. 5. Implement these search methods in a computer system so that analyses of these methods could
be done. 6. Analyze the properties of these search methods in terms of completeness, optimality, time
complexity and space complexity to solve this problem. 7. You are required to form groups or team yourself. Each group should have 3-4 students. You are
advised to include in your team/group at least ONE student who knows how to do programming, any programming languages, Matlab, Python, C, C++ and/or Java etc. could be used. 8. Submit to me student names, ID and class (e.g., D1 or D2) of your team members NEXT WEEK
(week 5 in Wechat). Students forming a team should come from the same class (D1 or D2). 9. A user friendly interface should be provided. A system name/title is given, e.g, “A Pattern
Matching and Recognition System”. 10. A presentation and demonstration will be performed in weeks 14 and 15 using ZOOM. 11. Each group or team is required to have a 10-minute presentation which includes the
introduction, description of your method(s), problems you have solved, your contributions, what have achieved in your system and a demonstration of your project. 12. A clear, succinct, easy to understand user manual/guide on how to INSTALL and EXECUTE the
software (freeware or others) and your DEVELOPED system should be included in the report. 13. You are also required to submit a full report of your system to the email mentioned in point 14. The report should include the following information.  All your team members’ name, ID number and team number (to be assigned later) and
class (e.g., D1 or D2).  The problems you have solved.  Which uninformed or informed search methods you have used and why?