Use setBackend instead of ConvertToCpu workaround

Change the convertion to backend 'cpu' from a custom function converToCpu in the database to the generic setBackend().

Content :

• Remove the call to convertToCpu in database, its definition & tests.

However it raises a problem on the layout of the data between different backends. In the current code the resulting tensor with backend 'cpu' have layout [N,H,W,C] instead of [N,C,H,W].

• Use format HWC for OpenCV tensor and change format when converting to CPU backend.

added LanguageC++ label

requested review from @olivierbichler and @pineapple

assigned to @thibaultallenet

added StatusWIP label

@thibaultallenet Looks like this MR is outdated, yet the convertCpu is still there. Is there any chance to quickly finalize this MR now that there is data layout support in core?

closed

reopened

changed the description

removed StatusWork in Progress label

added StatusReview Ready label

marked this merge request as ready

enabled an automatic merge when all merge checks for f4e82ab8 pass

mentioned in issue #1 (closed)

canceled the automatic merge

mentioned in commit 3da8f80b

merged