> -----Original Message----- > From: ffmpeg-devel <ffmpeg-devel-boun...@ffmpeg.org> On Behalf Of Ting > Fu > Sent: 2021年5月6日 16:46 > To: ffmpeg-devel@ffmpeg.org > Subject: [FFmpeg-devel] [PATCH V2 4/4] dnn/vf_dnn_detect: add tensorflow > output parse support > > Testing model is tensorflow offical model in github repo, please refer > https://github.com/tensorflow/models/blob/master/research/object_detecti > on/g3doc/tf1_detection_zoo.md > to download the detect model as you need. > For example, local testing was carried on with > 'ssd_mobilenet_v2_coco_2018_03_29.tar.gz', and > used one image of dog in > https://github.com/tensorflow/models/blob/master/research/object_detecti > on/test_images/image1.jpg > > Testing command is: > ./ffmpeg -i image1.jpg -vf > dnn_detect=dnn_backend=tensorflow:input=image_tensor:output=\ > "num_detections&detection_scores&detection_classes&detection_boxes":m > odel=ssd_mobilenet_v2_coco.pb,\ > showinfo -f null - > > We will see the result similar as below: > [Parsed_showinfo_1 @ 0x33e65f0] side data - detection bounding boxes: > [Parsed_showinfo_1 @ 0x33e65f0] source: ssd_mobilenet_v2_coco.pb > [Parsed_showinfo_1 @ 0x33e65f0] index: 0, region: (382, 60) -> > (1005, 593), label: 18, confidence: 9834/10000. > [Parsed_showinfo_1 @ 0x33e65f0] index: 1, region: (12, 8) -> (328, > 549), label: 18, confidence: 8555/10000. > [Parsed_showinfo_1 @ 0x33e65f0] index: 2, region: (293, 7) -> (682, > 458), label: 1, confidence: 8033/10000. > [Parsed_showinfo_1 @ 0x33e65f0] index: 3, region: (342, 0) -> (690, > 325), label: 1, confidence: 5878/10000. > > There are two boxes of dog with cores 94.05% & 93.45% and two boxes of > person with scores 80.33% & 58.78%. > > Signed-off-by: Ting Fu <ting...@intel.com> > --- > libavfilter/vf_dnn_detect.c | 95 > ++++++++++++++++++++++++++++++++++++- > 1 file changed, 94 insertions(+), 1 deletion(-) > > diff --git a/libavfilter/vf_dnn_detect.c b/libavfilter/vf_dnn_detect.c > index 7d39acb653..818b53a052 100644 > --- a/libavfilter/vf_dnn_detect.c > +++ b/libavfilter/vf_dnn_detect.c > @@ -48,6 +48,9 @@ typedef struct DnnDetectContext { > #define FLAGS AV_OPT_FLAG_FILTERING_PARAM | > AV_OPT_FLAG_VIDEO_PARAM > static const AVOption dnn_detect_options[] = { > { "dnn_backend", "DNN backend", > OFFSET(backend_type), AV_OPT_TYPE_INT, { .i64 = 2 }, > INT_MIN, INT_MAX, FLAGS, "backend" }, > +#if (CONFIG_LIBTENSORFLOW == 1) > + { "tensorflow", "tensorflow backend flag", 0, > AV_OPT_TYPE_CONST, { .i64 = 1 }, 0, 0, FLAGS, "backend" }, > +#endif > #if (CONFIG_LIBOPENVINO == 1) > { "openvino", "openvino backend flag", 0, > AV_OPT_TYPE_CONST, { .i64 = 2 }, 0, 0, FLAGS, "backend" }, > #endif > @@ -59,7 +62,7 @@ static const AVOption dnn_detect_options[] = { > > AVFILTER_DEFINE_CLASS(dnn_detect); > > -static int dnn_detect_post_proc(AVFrame *frame, DNNData *output, > uint32_t nb, AVFilterContext *filter_ctx) > +static int dnn_detect_post_proc_ov(AVFrame *frame, DNNData *output, > AVFilterContext *filter_ctx) > { > DnnDetectContext *ctx = filter_ctx->priv; > float conf_threshold = ctx->confidence; > @@ -136,6 +139,96 @@ static int dnn_detect_post_proc(AVFrame *frame, > DNNData *output, uint32_t nb, AV > return 0; > } > > +static int dnn_detect_post_proc_tf(AVFrame *frame, DNNData *output, > AVFilterContext *filter_ctx) > +{ > + DnnDetectContext *ctx = filter_ctx->priv; > + int proposal_count; > + float conf_threshold = ctx->confidence; > + float *conf, *position, *label_id, x0, y0, x1, y1; > + int nb_bboxes = 0; > + AVFrameSideData *sd; > + AVDetectionBBox *bbox; > + AVDetectionBBoxHeader *header; > + > + proposal_count = *(float *)(output[0].data); > + conf = output[1].data; > + position = output[3].data; > + label_id = output[2].data; > + > + sd = av_frame_get_side_data(frame, > AV_FRAME_DATA_DETECTION_BBOXES); > + if (sd) { > + av_log(filter_ctx, AV_LOG_ERROR, "already have dnn bounding > boxes in side data.\n"); > + return -1; > + } > + > + for (int i = 0; i < proposal_count; ++i) { > + if (conf[i] < conf_threshold) > + continue; > + nb_bboxes++; > + } > + > + if (nb_bboxes == 0) { > + av_log(filter_ctx, AV_LOG_VERBOSE, "nothing detected in this > frame.\n"); > + return 0; > + } > + > + header = av_detection_bbox_create_side_data(frame, nb_bboxes); > + if (!header) { > + av_log(filter_ctx, AV_LOG_ERROR, "failed to create side data > with %d bounding boxes\n", nb_bboxes); > + return -1; > + } > + > + av_strlcpy(header->source, ctx->dnnctx.model_filename, > sizeof(header->source)); > + > + for (int i = 0; i < proposal_count; ++i) { > + y0 = position[i * 4]; > + x0 = position[i * 4 + 1]; > + y1 = position[i * 4 + 2]; > + x1 = position[i * 4 + 3]; > + > + bbox = av_get_detection_bbox(header, i); > + > + if (conf[i] < conf_threshold) { > + continue; > + } > + > + bbox->x = (int)(x0 * frame->width); > + bbox->w = (int)(x1 * frame->width) - bbox->x; > + bbox->y = (int)(y0 * frame->height); > + bbox->h = (int)(y1 * frame->height) - bbox->y; > + > + bbox->detect_confidence = av_make_q((int)(conf[i] * 10000), > 10000); > + bbox->classify_count = 0; > + > + if (ctx->labels && label_id[i] < ctx->label_count) { > + av_strlcpy(bbox->detect_label, ctx->labels[(int)label_id[i]], > sizeof(bbox->detect_label)); > + } else { > + snprintf(bbox->detect_label, sizeof(bbox->detect_label), "%d", > (int)label_id[i]); > + } > + > + nb_bboxes--; > + if (nb_bboxes == 0) { > + break; > + } > + } > + return 0; > +} > + > +static int dnn_detect_post_proc(AVFrame *frame, DNNData *output, > uint32_t nb, AVFilterContext *filter_ctx) > +{ > + DnnDetectContext *ctx = filter_ctx->priv; > + DnnContext *dnn_ctx = &ctx->dnnctx; > + switch (dnn_ctx->backend_type) { > + case DNN_OV: > + return dnn_detect_post_proc_ov(frame, output, filter_ctx); > + case DNN_TF: > + return dnn_detect_post_proc_tf(frame, output, filter_ctx); > + default: > + avpriv_report_missing_feature(filter_ctx, "Current dnn backend do > not support detect filter\n");
do -> does, changed locally, will push tomorrow if there's no objection, thanks. _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-devel To unsubscribe, visit link above, or email ffmpeg-devel-requ...@ffmpeg.org with subject "unsubscribe".
