try to enable Winograd by default in FP32 mode and disable it by default in FP16 mode

[vpisarev]

Hopefully, it will resolve regressions since 4.8.1 (see also #24587)

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• I agree to contribute to the project under Apache 2 License.
• To the best of my knowledge, the proposed patch is not based on a code under GPL or another license that is incompatible with OpenCV
• The PR is proposed to the proper branch
• There is a reference to the original bug report and related work
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  Patch to opencv_extra has the same branch name.
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[zihaomu]

Hi @vpisarev, the default of useWinograd may not work. And I propose to add one more line code change like: https://github.com/opencv/opencv/pull/24587/files#r1403795553.

From:

useWinograd = params.get<bool>("use_winograd", true);

to

useWinograd = params.get<bool>("use_winograd", useWinograd);

So that, we could use the default of useWinograd to control the computation branch.

[vpisarev]

Hi @vpisarev, the default of useWinograd may not work. And I propose to add one more line code change like: https://github.com/opencv/opencv/pull/24587/files#r1403795553.

From:

useWinograd = params.get<bool>("use_winograd", true);

to

useWinograd = params.get<bool>("use_winograd", useWinograd);

So that, we could use the default of useWinograd to control the computation branch.

done

[zihaomu]

LGTM! 👍

[asmorkalov]

👍