From 96c79d4e1fd87dbedfd70ed876ee257ddda2ba90 Mon Sep 17 00:00:00 2001
From: Paul B Mahol <onemda@gmail.com>
Date: Fri, 17 May 2019 19:00:47 +0200
Subject: avfilter/vf_ocr: also export confidence of result

---
 libavfilter/vf_ocr.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

(limited to 'libavfilter/vf_ocr.c')

diff --git a/libavfilter/vf_ocr.c b/libavfilter/vf_ocr.c
index abfff49438..d5f76059b7 100644
--- a/libavfilter/vf_ocr.c
+++ b/libavfilter/vf_ocr.c
@@ -100,11 +100,21 @@ static int filter_frame(AVFilterLink *inlink, AVFrame *in)
     AVFilterLink *outlink = ctx->outputs[0];
     OCRContext *s = ctx->priv;
     char *result;
+    int *confs;
 
     result = TessBaseAPIRect(s->tess, in->data[0], 1,
                              in->linesize[0], 0, 0, in->width, in->height);
+    confs = TessBaseAPIAllWordConfidences(s->tess);
     av_dict_set(metadata, "lavfi.ocr.text", result, 0);
+    for (int i = 0; confs[i] != -1; i++) {
+        char number[256];
+
+        snprintf(number, sizeof(number), "%d ", confs[i]);
+        av_dict_set(metadata, "lavfi.ocr.confidence", number, AV_DICT_APPEND);
+    }
+
     TessDeleteText(result);
+    TessDeleteIntArray(confs);
 
     return ff_filter_frame(outlink, in);
 }
-- 
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