A Comparative Study of Human Thermal Face Recognition Based on Haar Wavelet Transform and Local Binary Pattern

Algorithm 1

LabelConnectedComponent(im).

//LabelConnectedComponent(im) is a method which takes//one argument that is an image

named if.𝑓(𝑥,𝑦) is the current pixel on 𝑥th row and 𝑦th column.

(1) Consider the whole image pixel by pixel in row wise manner in order to get connected

  component.Let 𝑓(𝑥,𝑦) be the current pixel position

  if (𝑓(𝑥,𝑦)==1) and 𝑓(𝑥,𝑦) does not any labelled neighbour in its 8-connected

  neighbourhood) then

    Create a new label for 𝑓(𝑥,𝑦).

 else

  if (𝑓(𝑥,𝑦) has only labelled neighbour) then

     Mark 𝑓(𝑥,𝑦) with that label.

 else

  if ( 𝑓(𝑥,𝑦) has two or more labeled) then

    Choose one of the labels for 𝑓(𝑥,𝑦) and memorize that these labels are equivalent.

(2) Go another pass through the image to determine the equivalencies and labeling each pixel

  with a unique label for its equivalence class.