| compare_table | Compare values within tow arrays or matrices. Helper function for 'locate_ndl_in_hay()'. |
| count_val_freq | Helper function for 'compare_table()'. |
| get_os | Get OS name |
| hay2needle | Cut off a part of image from a whole image. |
| image2gray_matrix | Convert cimg class into grayscale xy matrix. Helper function for 'locate_image()'. Use grayscale to Speed up and to simplify code. |
| index2xy | Convert array index into xy location in matrix. Helper function for 'locate_ndl_in_hay()'. |
| install_screenshot | Install command line screenshot for Windows. |
| is_all_same | Helper function for 'locate_ndl_in_hay()'. |
| locate_image | Locate needle image position on a screenshot image. |
| locate_ndl_in_hay | Locate needle image matrix position in a haystack_image matrix. Helper function for 'locate_image()'. |
| screenshot | Take a screenshot. |
| screenshot_exists | Find screenshot exec file. |
| xy_pos | Get xy position of a value in a matrix Helper function for 'locate_ndl_in_hay()'. |