[Bug]: auto focal point crop only work under opencv-python<4.8

[vantang]

Is there an existing issue for this?

• I have searched the existing issues and checked the recent builds/commits

What happened?

retrun errors

Steps to reproduce the problem

What should have happened?

report error

*** Error completing request
*** Arguments: ('task(r4izcoape5o55pt)', 'D:\\IMGPrep\\muci-mix', 'D:\\IMGPrep\\muci-crop', 1024, 1024, 'ignore', False, False, False, False, True, 0.5, 0.2, True, 0.9, 0.15, 0.5, False, False, 384, 768, 4096, 409600, 'Maximize area', 0.1) {}
    Traceback (most recent call last):
      File "D:\stable-diffusion-webui\modules\call_queue.py", line 57, in f
        res = list(func(*args, **kwargs))
      File "D:\stable-diffusion-webui\modules\call_queue.py", line 36, in f
        res = func(*args, **kwargs)
      File "D:\stable-diffusion-webui\modules\textual_inversion\ui.py", line 19, in preprocess
        modules.textual_inversion.preprocess.preprocess(*args)
      File "D:\stable-diffusion-webui\modules\textual_inversion\preprocess.py", line 18, in preprocess
        preprocess_work(process_src, process_dst, process_width, process_height, preprocess_txt_action, process_keep_original_size, process_flip, process_split, process_caption, process_caption_deepbooru, split_threshold, overlap_ratio, process_focal_crop, process_focal_crop_face_weight, process_focal_crop_entropy_weight, process_focal_crop_edges_weight, process_focal_crop_debug, process_multicrop, process_multicrop_mindim, process_multicrop_maxdim, process_multicrop_minarea, process_multicrop_maxarea, process_multicrop_objective, process_multicrop_threshold)
      File "D:\stable-diffusion-webui\modules\textual_inversion\preprocess.py", line 212, in preprocess_work
        for focal in autocrop.crop_image(img, autocrop_settings):
      File "D:\stable-diffusion-webui\modules\textual_inversion\autocrop.py", line 32, in crop_image
        focus = focal_point(im_debug, settings)
      File "D:\stable-diffusion-webui\modules\textual_inversion\autocrop.py", line 75, in focal_point
        face_points = image_face_points(im, settings) if settings.face_points_weight > 0 else []
      File "D:\stable-diffusion-webui\modules\textual_inversion\autocrop.py", line 150, in image_face_points
        faces = detector.detect(np.array(im))
    cv2.error: OpenCV(4.8.0) D:\a\opencv-python\opencv-python\opencv\modules\dnn\src\net_impl.cpp:279: error: (-204:Requested object was not found) Layer with requested id=-1 not found in function 'cv::dnn::dnn4_v20230620::Net::Impl::getLayerData'

Sysinfo

the key point is opencv-python must under 4.8, for example opencv-python==4.7.0.72 works fine

What browsers do you use to access the UI ?

Google Chrome

Console logs

report error

*** Error completing request
*** Arguments: ('task(r4izcoape5o55pt)', 'D:\\IMGPrep\\muci-mix', 'D:\\IMGPrep\\muci-crop', 1024, 1024, 'ignore', False, False, False, False, True, 0.5, 0.2, True, 0.9, 0.15, 0.5, False, False, 384, 768, 4096, 409600, 'Maximize area', 0.1) {}
    Traceback (most recent call last):
      File "D:\stable-diffusion-webui\modules\call_queue.py", line 57, in f
        res = list(func(*args, **kwargs))
      File "D:\stable-diffusion-webui\modules\call_queue.py", line 36, in f
        res = func(*args, **kwargs)
      File "D:\stable-diffusion-webui\modules\textual_inversion\ui.py", line 19, in preprocess
        modules.textual_inversion.preprocess.preprocess(*args)
      File "D:\stable-diffusion-webui\modules\textual_inversion\preprocess.py", line 18, in preprocess
        preprocess_work(process_src, process_dst, process_width, process_height, preprocess_txt_action, process_keep_original_size, process_flip, process_split, process_caption, process_caption_deepbooru, split_threshold, overlap_ratio, process_focal_crop, process_focal_crop_face_weight, process_focal_crop_entropy_weight, process_focal_crop_edges_weight, process_focal_crop_debug, process_multicrop, process_multicrop_mindim, process_multicrop_maxdim, process_multicrop_minarea, process_multicrop_maxarea, process_multicrop_objective, process_multicrop_threshold)
      File "D:\stable-diffusion-webui\modules\textual_inversion\preprocess.py", line 212, in preprocess_work
        for focal in autocrop.crop_image(img, autocrop_settings):
      File "D:\stable-diffusion-webui\modules\textual_inversion\autocrop.py", line 32, in crop_image
        focus = focal_point(im_debug, settings)
      File "D:\stable-diffusion-webui\modules\textual_inversion\autocrop.py", line 75, in focal_point
        face_points = image_face_points(im, settings) if settings.face_points_weight > 0 else []
      File "D:\stable-diffusion-webui\modules\textual_inversion\autocrop.py", line 150, in image_face_points
        faces = detector.detect(np.array(im))
    cv2.error: OpenCV(4.8.0) D:\a\opencv-python\opencv-python\opencv\modules\dnn\src\net_impl.cpp:279: error: (-204:Requested object was not found) Layer with requested id=-1 not found in function 'cv::dnn::dnn4_v20230620::Net::Impl::getLayerData'

### Additional information

but some of the extensions requirements.txt set opencv-python>=4.8, for example control net....

[w-e-w]

Fix PR #14121