Expand color range selections to up or down only

[abolfazl29032603daba]

for example i selected some areas like following: 

 

Now i want to expand above selections to following: 

 

If have any trick or script for this, please provide here.  

I hope you fully understand what I mean because this was the simplest possible explanation. 

[Bojan Živković]

There is built-in expand function to expand selection but without control to limit sides of expansion.

I will tag scripters that may help you: @c.pfaffenbichler @Stephen Marsh @jazz-y @r-bin @Chuck Uebele 

If you want to expand manually then use Transform Selection and drag side that you want to expand.

[Stephen Marsh]

@abolfazl29032603daba 

So, firstly you want to turn multiple selections that may have any arbitrary shape, into a rectangular selection at the same bounding area... But you still wish to retain separate selections, not have them merged.

Secondly you want to expand the centered selection in the height a given distance in pixels.

Probably both together, but I see it as two separate main steps from a scripting point of view (not to mention needing to work on each separate selection one at a time).

[Stephen Marsh]

The following script from @c.pfaffenbichler will create a rectangular selection from the bounding area of an arbitrary selection.

https://community.adobe.com/t5/photoshop-ecosystem-discussions/how-can-i-automatically-create-a-rect...

Multiple selections would be combined/merged, so the script would need to be more complex than above.

EDIT:

It appears that this has been partly answered in one of your previous topics – https://community.adobe.com/t5/photoshop-ecosystem-discussions/how-to-convert-color-range-selections...

[abolfazl29032603daba]

The following script from @c.pfaffenbichler will create a rectangular selection from the bounding area of an arbitrary selection.

https://community.adobe.com/t5/photoshop-ecosystem-discussions/how-can-i-automatically-create-a-rect...

By @Stephen Marsh

tnq but it not working for me and converted following selections to full image size selection! 

 

It appears that this has been partly answered in one of your previous topics – https://community.adobe.com/t5/photoshop-ecosystem-discussions/how-to-convert-color-range-selections...

By @Stephen Marsh

no it is only for left side of chart images, even in left side of chart images it make rectangular selection on all of characters and not each character one by one!