I'm not sure I understand the opening post.
As far as I am aware, image capture from screenshots is all sorted:
For full screen captures:- (a) If you press PrtSc (PrintScreen), then you get a screenshot image captured by the system (as per normal) and it is also held in the Clipboard,and
- (b) if CHS (Clipboard Help & Spell) is running, then you also simultaneously get the image saved into the CHS database, and
- (c) if SC (ScreenshotCaptor) is running, then you also simultaneously get the image saved to the default SC image capture folder, and when you open SC it presents that image ready for editing.
- (d) if the SC Toolbar is up, then one click does a full screen capture per (c) (and (b) applies also).
For partial screen captures:(i) if the SC Toolbar is up, then one click on the appropriate Toolbar button (or the relevant hotkey combo) takes care of it, and (b) and (c) above apply.
(ii) It gets even better if you are a OneNote user, because the OneNote capture tool sends clips straight to OneNote (and (b) also applies), where they are saved with metadata to a page in the default collection section, and any text in the image captured is OCRed and indexed for search and becomes metadata.
It all seems to be either one hotkey press (the relevant hotkey combo) or a single mouseclick, whichever way you look at it.
You can
add intermediate steps to this if you want - e.g., if you (say) wanted to view a screen clip in SC before moving on - but I don't see how you could
simplify it much further.