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README.md

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-Assignment 2
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-Basic Image Processing Fall 2021
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-General rules
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-This is the second Assignment. There will be two more Assignments during the semester.
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-Point value:   **20 points**, which is 20% of the total assignment points. Deadline:   **October 25, 2021 23:59:59** (late submission until Oct. 27)
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-This is a not-guided exercise. The description of this assignment is general and does not focus on the details as in case of the Lab exercises.
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-The main task is to provide a good, reasonable solution. You may code “freely” (only minimal restrictions on file names and outputs are given).
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 Problem formulation
 
 You have to write a custom data processing (optical pattern / data recognition) program that can straighten a rotated page of text, can identify optical markers in the page and can digitize the handwritten data
 
 **Input:**  an image showing a possibly rotated page of a questionnaire **Output:**  the digitized data
 
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 Tasks to do
 
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 1. stores the digitized value in an accumulator (an array)
 1. after each image is processed, returns the statistics of the votes.
 
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 Key results to be presented:
 
 You may code freely, as there are not so many restrictions on what to use. However, please create the followings:
 
 1) A function named processor which takes and argument (image matrix) and returns the digitized data (a 4×2 matrix containing ones at places where the corresponding circles contained an X)
 1) A script that iterates through all images in the input folder, applies the processor function to each of them and summarizes the results.
 
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 Key results to be presented:
 
 Further details of the processor function:
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 whether this circle contains a cross or not
 
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 Figure 1
 
 ![](Aspose.Words.15f83814-b7ae-4230-9234-5b5ad2783846.001.jpeg)
 
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 Figure 2
 
 ![](Aspose.Words.15f83814-b7ae-4230-9234-5b5ad2783846.002.png)
 
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 Figure 3
 
 ![](Aspose.Words.15f83814-b7ae-4230-9234-5b5ad2783846.003.png)
 
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 Console output after the processing is complete
 
 ![](Aspose.Words.15f83814-b7ae-4230-9234-5b5ad2783846.004.png)
 
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 There is no code package for this assignment.
 
 All scripts and functions must be written entirely by you.
 
 Download the image to be processed from here: <https://beta.dev.itk.ppke.hu/bipa/assignment_02>
 
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 Submission & hints
 
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 **Check the upcoming slides for hints!**
 
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 Hint 1
 
 Start by applying an RGB to grayscale operation and then an edge finding operation. You may consider using the built-in edge function with an appropriate method and additional parameters.
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 The angle of this line is the same as the rotation of the image. See the figure in the next slide!
 
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 Hint 1
 
 ![](Aspose.Words.15f83814-b7ae-4230-9234-5b5ad2783846.005.jpeg)
 
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 Hint 3
 
 The Hough method can be modified in order to find circles instead of lines. Use the equation of the circle:
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 In this Assignment, the radius of the circle can be considered known, so the Hough space can (and should) be 2D.
 
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 Hint 4
 
 Identify the relationship between the circles by the position of their centers. Use this info to identify which circle corresponds to which answer option.
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 E.g. a Laws-like filter (or a simple convolution) can be used to detect whether the content looks like an X or not. Any other methods (e.g. Fourier based) can be good too.
 
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-Grading
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-The final score of this assignment is the sum of the following points:
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-The script filename is correct, it’s a script, function exists, name is correct 2 points Script processes all images in the input folder 1 point
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-Edge finding exists, chosen method and its parameters are OK 1 point
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-FFT of the edge image exists, maxima values are used for rotation angle 2 points Image is straightened using the angle in the previous point, Fig.1 exists 1 point Hough space exists, has correct dimensions and type 2 points Hough algorithm is for circles, it works as expected, Fig.2 exists and looks good 2 points Found circles are cropped as requested, exactly 8 circles are found 2 points Cross detection works as expected, Fig.3 exists and looks good 2 points Function returns a 4×2 boolean matrix, values are OK, accumulation is OK 2 points
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-The script shows a summary after the processing is done 1 point
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-Code quality (readability, understandability, good comments and structure) 2 points **TOTAL:**      **20 points** 17
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-Contact
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-If you have any further questions regarding this assignment, contact
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-**Márton Bese NASZLADY** 
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-via **Teams** (in private chat) or write an email to naszlady@itk.ppke.hu
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-**THE END**
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