How to slice and put them back together

G’Mic newbie here.

I have a set of images, a timelapse, that spans a couple of hours.

I’ve been using imagemagick to slice the images and put them back into 1 image.

The problem, that I have, is that it assembles as slices

I’d like to have smooth transitions between each slice.

I am looking at G’MIC and the slice command it says:

``````slices
Arguments:

z0[%],_z1[%]

Description:
Keep only specified slices of selected images.``````
1. what is z0? what is _z1?
2. how do I assemble?
3. can I make a “smooth” merging of the slices?

Thanks

2 Likes

In G’MIC, the word slice is used in the context of 3D volumetric images, i.e. where an image has a width (size along the x-axis), a height (size along the y-axis) and a depth (size along the z-axis).
In that case, a slice J correspond to the 2D image defined by J(x,y) = I(x,y,z), where z is the slice number (going from 0 to depth - 1).

So, that’s completely different from what you are looking for.

Can you point me in the direction to create slices and reassemble them?

Thanks

Use `split x,16` , where 16 is the number of blocs you want at the end.

``````\$ gmic sp lena split x,16
``````

Then, to reassemble:

``````\$ gmic sp lena split x,16 append x
``````

Thank you for taking the time to help me.

Perhaps you should look at enblend for the transitions:
http://enblend.sourceforge.net/

Try using Hugin to smooth transitions betweeen slices

the Image ref is

slice the ref image using Imagemagick ( 4 vertical slices )

convert b.jpg -crop 4x1@ +repage output%02d.jpg

Then change EV for each slice using Darktable ( -2EV, - 1EV, 0.EV, +1EV)

Assemble the slices using Hugin

then use Hugin to smooth transition between slices

the result without any optimizations

Wow

This is will become my project for the end of the year (right now, we are moving).

Just a quick question, do the slices need some overlap?

Thank you very much

No, the slices don’t need some overlap