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(defn md5 [str]
  (let [md (java.security.MessageDigest/getInstance "MD5")
        bytes (.digest md (.getBytes str))
        bi (BigInteger. 1 bytes)]
    (.toString bi 16)))


(defn calculate-visual-id
  [images]
  (md5 (clojure.string/lower-case (clojure.string/join (sort (distinct images))))))

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cortex.verify.nn.train> (-> [(layers/input input-w input-h 1 :id :data)
                             (layers/convolutional 5 0 1 20)
                             (layers/max-pooling 2 0 2)
                             (layers/relu)
                             (layers/convolutional 5 0 1 50)
                             (layers/max-pooling 2 0 2)
                             (layers/batch-normalization)
                             (layers/linear 1000)
                             (layers/relu :center-loss {:label-indexes {:stream :labels}
                                                        :label-inverse-counts {:stream :labels}

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cortex.verify.nn.train> (-> [(layers/input input-w input-h 1 :id :data)
                             (layers/convolutional 5 0 1 20)
                             (layers/max-pooling 2 0 2)
                             (layers/relu)
                             (layers/convolutional 5 0 1 50)
                             (layers/max-pooling 2 0 2)
                             (layers/batch-normalization :mode :spatial)
                             (layers/linear 1000)
                             (layers/relu :center-loss {:label-indexes {:stream :labels}
                                                        :label-inverse-counts {:stream :labels}

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// Targeted by JavaCPP version 1.4: DO NOT EDIT THIS FILE

package tvm_clj.tvm;

import java.nio.*;
import org.bytedeco.javacpp.*;
import org.bytedeco.javacpp.annotation.*;

public class runtime extends tvm_clj.tvm.presets.runtime {
    static { Loader.load(); }

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fsof.event-analysis.verification> (->> (sql/event-account-videos 6703)
                                       (group-by :proxy-url)
                                       (map (fn [[url acc-vids]]
                                              [url (count acc-vids)])))
(["s3://fsof-video-corpus/events/6703/proxies/902161.mp4" 8]
 ["s3://fsof-video-corpus/events/6703/proxies/900074.mp4" 1]
 ["s3://fsof-video-corpus/events/6703/proxies/902301.mp4" 1]
 ["s3://fsof-video-corpus/events/6703/proxies/902495.mp4" 1]
 ["s3://fsof-video-corpus/events/6703/proxies/902604.mp4" 1]
 ["s3://fsof-video-corpus/events/6703/proxies/902718.mp4" 5]

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```clojure
(summarize-joined-videos joined-vids acc-vids appearance-counts)
{:num-account-videos 469,
 :summary [{:analysis-type :dlib-faces-only,
            :found-appearance-stats {:initial-appearance-depths {:avg 10.67945205479452,
                                                                 :max 96.0,
                                                                 :min 0.0},
                                     :last-appearance-depths {:avg 27.72602739726027,
                                                              :max 99.0,
                                                              :min 0.0},

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{:body {:summary {:num-account-videos 466,
                  :num-checkins 563,
                  :summaries {:appearance-system {:dlib-correlation {:match-depth {:avg 17.63100137174211,
                                                                                   :max 99.0,
                                                                                   :min 0.0},
                                                                     :match-score {:avg 0.867808825869121,
                                                                                   :max 1.1787557637974377,
                                                                                   :min 0.373683437641763},
                                                                     :matching-count 729,
                                                                     :num-found-videos 367,

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{:num-account-videos 466,
 :num-checkins 563,
 :summaries {:appearance-system {:dlib-correlation {:match-depth {:max 99.0,
                                                                  :mean 17.63100137174211,
                                                                  :median 6,
                                                                  :min 0.0,
                                                                  :variance 559.7853562760971},
                                                    :match-score {:max 1.1787557637974377,
                                                                  :mean 0.867808825869121,
                                                                  :median 0.8816001907900003,

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Trained:  19 0.00 0.20 0.00  6 1.00 1.00 45  [0.001294] <- new best
Trained:  18 0.00 0.20 0.00  5 1.00 1.00 45  [0.001312] 
Trained:  17 0.10 0.00 0.30  7 1.20 0.70  5  [0.250000] 
Trained:  16 0.30 1.00 0.10  4 0.90 0.70 45  [0.001531] 
Trained:  15 0.00 0.00 0.00  1 0.70 0.70  5  [0.250000] 
Trained:  14 0.00 0.80 0.20  9 0.80 1.00 45  [0.001390] 
Trained:  13 0.00 0.00 0.30  2 0.80 0.90 45  [0.250000] 
Trained:  12 0.30 0.80 0.00  9 0.90 1.00 35  [0.001526] 
Trained:  11 0.20 1.00 0.00  1 1.30 1.00 45  [0.001132] <- new best
Trained:  10 0.10 1.00 0.00  7 0.70 0.90 45  [0.001388] 

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({:fsof.data.model.video-set/face-count 2088414,
  :fsof.data.model.video-set/name "min-face-size-40",
  :fsof.data.model.video-set/uuid #uuid "5b3f93da-f9a4-4431-bbb5-37cea2df6c3c"}
 {:fsof.data.model.video-set/face-count 1287144,
  :fsof.data.model.video-set/name "min-face-size-80",
  :fsof.data.model.video-set/uuid #uuid "5b3f93eb-7cfd-411b-8caa-f903733e76b9"}
 {:fsof.data.model.video-set/face-count 739941,
  :fsof.data.model.video-set/name "min-face-size-160",
  :fsof.data.model.video-set/uuid #uuid "5b3f93fb-ab73-42f2-b673-45f45c213847"})