
@C1@c@b@_ Image Merge

     To merge/concatenate two or more images to form a single image.

@b Interaction

    Click on Image2M to load the image to be merged.

    Click on the appropriate alignment buttons for the merging location.
    By default, images are concatenated with empty region filled with a
    fill color, changeable by clicking on the FillColor button. 

    The slider on the bottom of the control panel controls the separation
    from the current image, thus a negative value will merge the image into
    the current image. For the overlapping part, by default, the new image
    overwrites the current image. Click on the top/bottom button to
    change this default.

    Other operations for the overlapping part is possible by clicking
    on the topmost box on the right side of the control panel. Current
    operations include (A: current image. B: image to be merged)

@f    OverWrite: B
@f          Add: Min(B+A, 255)
@f          Sub: Max(B-A, 0)
@f         Diff: Abs(B-A)
@f          XOR: B^A
@f         Mask: B?B:A

    Exchange A&B when top/bottom setting is bottom. 

    The auto placement can be disabled by click on the Manual button,
    then use  mouse, ijkl or arrow keys to change the merge location.

    Click on Merge button to initiate merging. By default, all alignment
    is against the original image. To update alignment referenc, click
    on UpdateSize button.

    Click on Done to finish.

@b  Note
    1. Resulting image will always be in RGB.
    2. You can merge the same image repeatedly.
    3. The size update can be a little tricky, for example, to concatenate
       four identically sized images, the only way (without manual
       placement) to do it is to concatenate the first two then update
       size, do the remaining two without size update.
