How can I reflect then detect a certain line in image?

How can I reflect the line number (1) and move it (after reflection) until detect the line number (2) which is identical to it, Note that the image is raster.

[faten Ahmed]

can I reflect the line in raster formate??? or must convert the image to vector formate???

[darova]

Do you have coordinates of a gray line?

[faten Ahmed]

Yes

[darova]

Good

[faten Ahmed]

?????????

[darova]

Please attach all necessary data