Page 230 - AI Ver 1.0 Class 9
P. 230

Pixel It—Learning-Based Approach



        "Pixel It" is an example of a machine learning approach which is used in computer vision applications. The
        graphics or images created in computers are pixel-based images. It shows how the computer classifies the
        images and reads them.
        Let us do an activity that helps us to understand how the images are processed, classified by the computers.



                         Task                                                                  Experiential Learning



             Let us start with an activity. Follow the instructions step-by-step as mentioned below:
                • Cut out the matrix from the page given below or draw the same on a blank page with 6x6 square
                blocks.

                • Write an uppercase letter on this matrix. The height of the letter should be equal to the height of this
                matrix. In other words, it should start from the bottom line of the matrix till the top line. You can write
                any capital alphabet in any handwriting.
                • Now, colour the boxes on which the lines of that letter have fallen.
                • After this, cut out horizontal stripes of the matrix such that it goes from 1–2, 2–3, 3–4, 4–5, 5–6 and 6–7.

                • Now, paste all these stripes together to form a single paper string. Make sure that the last block should
                neither be over the first block of the next line nor should there be any gap in between the first and the
                last blocks.
                • Now, find those students in your class who have chosen the same letter as you.
                • Put their paper strings under your string and add up all the coloured blocks to get a series of numbers.
                A block without colour counts as 0 while the coloured ones count as 1. If a column has 3 coloured
                boxes, the summation turns out to be 3.

                • Now, get another student whose letter is different from yours. Put his paper string under your multiple
                strings (of same alphabet) and see if the pattern of coloured blocks are the same or not.
                • Also, go to other groups and check if their summation series of numbers is the same as yours or not.
                • Note down your observations in the end.

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