Algorithm 1 Welding noise generation method (WNGM)

1:procedure WNGM($src\text{\_}image$) 2:    $process\text{\_}img\leftarrow \mathrm{zeros}\mathrm{of}\mathrm{the}\mathrm{same}\mathrm{size}\mathrm{as}src\text{\_}image$ 3:    $process\text{\_}img\leftarrow$ArcLightSpatter($process\text{\_}img$) 4:    Add smoke noise 5:    Apply Gaussian blur to the image 6:    $src\text{\_}image\leftarrow src\text{\_}image+process\text{\_}img$ 7:    return $src\text{\_}image$ 8:end procedure 9:function ArcLightSpatter($image$) 10:    Generate random linear light streaks 11:    Rotate and truncate the light streaks 12:    Apply Gaussian blur to the streaks 13:    return $image$ 14:end function