Real-Time Hand Gesture Recognition Using Finger Segmentation

Algorithm 1

The method of producing the palm mask.

Input: A Group of points sampled uniformly from the circle

Find the nearest boundary point of one sampled point (𝑋,𝑌) (refer to (1))

Step 1. Acquire a pixel (𝑥,𝑦) around the sample point (𝑋,𝑌)

        𝑥=cosangle∗𝜋180∗rad+𝑋

        𝑦=sinangle∗𝜋180∗rad+𝑌

angle 𝜖 [0,360] and rad 𝜖 [1,𝐿] (𝐿 is the image size)

Step 2. If the value of the pixel is 0 i.e. 𝑃(𝑥,𝑦)==0,

goto Step 3. Otherwise, increase rad and angle with a step of 1 and then go to Step 1

Step 3. Check the values of 8 neighbors of the pixel (𝑥,𝑦), if it holds

  ∀𝑃(𝑥+𝑑𝑥,𝑦+𝑑𝑦)==0, (𝑥+𝑑𝑥,𝑦+𝑑𝑦)∈𝑁_(𝑥,𝑦)

𝑁_(𝑥,𝑦) is the set of 8 neighbors of the pixel (𝑥,𝑦).

Insert the point (𝑥+𝑑𝑥,𝑦+𝑑𝑦) into the array of palm mask points.

Step 4. Increase rad and angle, and then goto Step 1

(i) Continue to search the nearest boundary point of another sampled point until all

 the sampled points are scanned.

(ii) Connect all the points recorded in the array of palm mask points to yield the palm mask.