背景・目的

現在、世界の人口は急速に増え続けており、総計で約75億人にのぼるといわれています。
2050年には約100億人に達するとの見方もあり、今後もしばらくは増加を続けることでしょう。

そして、人口の増加に伴い、人間の生活拠点である「建物」も増加の一途をたどっています。
新しい「建物」を『どこに』『どの程度の量』建築するかという問題は、近年ミッションとして掲げられることの多い持続可能な社会の実現に向けて、大きな鍵になることでしょう。

そこで、本コンペティションでは、合成開口レーダー(SAR)により得られた画像を用いることで、新規に建築された「建物」を検出するアルゴリズムの作成に挑戦していただきます。

この課題を通して得られるアルゴリズムは、地域の健全な発展を目的とする「都市計画」をはじめとして様々な応用範囲が考えられます。

タスク説明

「以前(before)」と「以後(after)」の画像に対して、「以前(before)」には存在せず「以後(after)」に存在する新規の「建物」(新規建造物)を検出していただきます。


Contains modified Copernicus Sentinel data 2021 


データセット詳細

「以前(before)」と「以後(after)」で2時点の画像が与えられます。
それぞれの画像は「VV偏波」によって観測されたもの、「VH偏波」によって観測されたものの2種類が含まれるため、予測の手がかりとして与えられる画像は1組のデータにつき計4枚です。

SAR画像

項目内容
ファイルフォーマットtif
解像度一定ではない
サンプルサイズ(学習用) 28シーン (評価用) 21シーン
※ 1シーンにつき4枚の画像が含まれる

また、学習用データにのみSAR画像に対応するアノテーションが与えられます。

アノテーション

項目内容
ファイルフォーマットpng
解像度一定ではない
サンプルサイズ(学習用) 28枚
ラベル1: 新規建造物, 0: それ以外

※その他詳細は、「データ」タブをご参照ください。

評価指標

評価スコアは、FBetaScoreにより算出します。
Beta (β)の値は0.5とし、RecallとPrecisionの内、Precisionをより重視した評価を行います。


具体的には以下のような手順で最終的なスコアが計算されます。
①あるシーンに対して予測領域と正解領域(ピクセルレベル)のFBetaScoreを計算
②評価対象の全シーンに対して①の平均を計算して、この数値を最終的なスコアとする

最終順位の決定

1.コンペ最終日までの評価（暫定評価）は評価用データセットの一部で評価し、コンペ終了後の評価（最終評価）は評価用データセットの残りの部分で評価します。
　リーダーボードはコンテスト終了時に自動的に最終評価に切り替わり、それを元に最終順位を決定します。このため、開催中と終了後では順位が大きく変動する場合もあります。

2.スコアが同値の場合は、早い日時でご応募いただいた参加者を上位とします。

3.最終順位が上位の方を入賞候補者とし、事務局から連絡いたします。

4.入賞候補者には以下を提出していただきます。
　・モデルのソースコード
　・学習済モデル
　・ソースコードの説明書（前処理部分、学習部分、推論部分が分かるように明記。提供データ以外のデータや、学習済モデルを利用した場合は、そのソース（データの所在、論文のリンク等）も明記）
　・実行環境（OSのバージョン、使用ソフトウェア及び解析手法）
　・データの解釈、工夫点、モデリングから得られる示唆等

5.再現性検証期間中、入賞候補者及び、その提出モデルが下記いずれかに該当する場合は入賞の資格を失います。
　・事務局からの手続き上の連絡・要求に対して指定された期限内に対応しない
　・参加条件やルールを満たしていない
　・プログラムが動作しない
　・学習済モデルから出力されるスコアと最終評価スコアが一致しない
　・その他、事務局が不当と判断した場合

6.再現性を確認できた方から入賞者を選定します。

参加資格
・本コンペティションは人財発掘を目的としている性質上、採用及び業務委託の実現性を考慮し「日本国籍且つ日本在住」の方のみ参加可能とします。

情報の取り扱い
・本コンペティションのフォーラム以外の場所で他の参加者と本コンペのアルゴリズムに関連するデータ・ソースコードを共有する行為は禁止とします。

データおよびツールの利用
・アノテーションツールなどによって手動で作成した予測結果を提出することは禁止とします。
・評価データをモデルの学習に用いることは禁止とします。
・外部のデータ(学習済みモデルを含む)及びツールの利用は、以下a〜dの条件を全て満たす場合のみ許可します。
        a. ソースが明確である
        b. 誰でも利用することができる
        c. 無償で利用することができる
        d. 商業的な目的のもと利用することができる
・学習データの修正は(再現可能な範囲で)可能です。修正を行う場合は、再現性を担保するため、ラベル変更箇所（対象データ、座標）と変更手順を、ソースコード以外の文書に明記して下さい（入賞時、ソースコードと合わせてご提出頂く必要がございます）。
・評価データに対して予測時に画像処理の手法によって自動的にデータを水増しすることは可能です。ただし、途中で人の手による操作が入るアルゴリズムは禁止です。


実装方法
・同じフォーマットで、異なるデータを入力した場合にも、同様のロジックで予測できなければなりません。
・ソースコードは、以下のように、前処理、学習、予測、の3つに分け、それぞれを実行すれば処理が進むように実装して下さい。

①preprocess
　提供データを読み込み、データに前処理を施し、モデルに入力が可能な状態でファイル出力するモジュール。
　get_train_dataやget_test_dataのように、学習用と評価用を分けて前処理を行う関数を定義。
②train
　①で作成したファイルを読み込み、モデルを学習するモジュール。
　学習済みモデルや特徴量、クロスバリデーションの評価結果を出力する関数等を定義。
③predict
　①で作成したテストデータ及び②で作成したモデルを読み込み、予測結果をファイルとして出力するモジュール。

システムの利用
・1参加者につき1アカウントが必要です。1人で複数アカウントを利用、1アカウントを複数人で共有することは禁止します。

Disclosure policy

As a general rule, in accordance with Article 4, Paragraph 1 of the terms of participation, diclosing any contents such as insights and deliverables transmitted through the information or data provided by our company in relation to this competition is not permitted, however, only after the completion of this competition and for non-commercial purposes, it will be possible to disclose the contents within the score of the table below
Model *1
Private
Analysis results *2
Restricted
Public : Posting to social media sites, blogs and source repositories, and citing to papers
Restricted : Using in a limited range from research, education to seminars, where many unspecified people cannot access
*1 Execution unit source code and learned models
*2 The insights obtained using the information and data provided, or the solutions including scripts and processed data such as summary statistics

※Notes

上記「分析結果」に、当社から提供された生データは含まれません。生データについては、第4条4項の通り、本コンペティションの終了後速やかに削除してください。

【本コンペ特記事項】
本コンペティションは、依頼主である株式会社スペースシフト（以下、「クライアント」といいます。）による人財発掘を目的としています。そのため、本コンペティションの参加者には、会員登録時の入力情報に追加して、個人情報をご入力いただきます。本コンペティションにおける参加者の情報は、株式会社SIGNATEからクライアントに対して提供されます。これに伴い、当該クライアント又は株式会社SIGNATEから、参加者に対して、採用又は業務委託に関する情報提供又はオファーに関する連絡がなされる場合があります。

なお、本コンペティションは、採用及び業務委託の実現可能性を鑑みて、日本在住且つ日本国籍の方のみ参加可能とします。
en) Since the purpose of this competition is to find human resources for the host company, only those who live in Japan and have Japanese nationality are eligible to participate.


Terms of Participation in SIGNATE Competition

In order to participate in the Competition, you are required to agree to these Terms, in addition to the Terms of Use of SIGNATE.JP Site (hereinafter referred to as the “Terms of Use”). You should participate in the Competition after reading carefully and agreeing to these Terms. These Terms, the matters that are displayed as “additional matters” that you have agreed to when participating in a Competition, the Terms of Use and other terms and conditions that you have agreed to (hereinafter collectively referred to as “these Terms, etc.”) shall all be binding on the Participant.


Article 1. Definitions

１.For the purpose of these Terms, the following terms shall be defined as follows:

(１)"Site" means the website "SIGNATE (https://signate.jp)” on which the Competitions are posted.
(２)"Competition" means any competition on AI development or data analysis on the Site as held by the Host.
(３)"Host" is the host(s) of the Competitions. The Host may be SIGNATE, Inc. (hereinafter referred to as the “Company”) or the Company’s client companies, affiliated companies, schools or organizations, etc. (hereinafter referred to as the “Client(s)”).
(４)"Participant(s)" means the member(s) who participate in a Competition.
(５)"Submissions" means, collectively, the analysis and prediction results and reports, etc. as submitted in the Competition.
(６)"Final Submissions" means the Submissions that are specified by a Participant on the prescribed page in the Site by the time of completion of a Competition.
(７)"Winner Candidate" means the Participant who has received a notice from the Company that he/she is nominated as a winner candidate.
(８)"Submissions for Final Judgment" means the analysis and prediction model and learning data, etc. as submitted by a Winner Candidate pursuant to the instructions of the Company.
(９)"Final Judgment" means the acceptance inspection and judgment, including reproducibility verification, by the Company for the Final Submissions and Submissions for Final Judgment of a Winner Candidate.
(１０)"Winner" means the Winner Candidate who is informed by the Company that he/she has won a prize.

Article 2 Competition

１.A member who desires to participate in a Competition shall be required to agree to these Terms and to satisfy the conditions for participation as specified in each such Competition. Any person who is not a member shall not participate in any Competition.
２.Participants shall participate in each Competition in the manner as advised by the Company and shall be obligated to comply with the rules as prescribed in each Competition.
３.Participants may submit the Submissions for the assignment of each Competition during the period of such Competition and submit a proposal on the method of solving the problem to the Host by the end of the period of the said Competition.
４.Participants may submit the Final Submissions in the form specified in each Competition by the time specified by the said Competition.
５.The Final Submissions as submitted shall be evaluated by the evaluation method as specified in each Competition and the final rank order shall be determined based on such evaluation.
６.Any Participant may, as a general rule, check the evaluation results of the Participant him/herself and each of the other Participants on the Site for the Submissions that may be evaluated quantitatively.
７.Participants shall be liable or otherwise responsible for their own Submissions, including their legality.
８.Participants shall not submit any Submissions that have no direct relationship to each Competition.
９.Unless otherwise provided for, Participants shall not directly communicate to, consult with, make a request to, solicit or take any other actions with the Host in respect of the matters related to a Competition during the period of the said Competition.
１０.Any Participant who has uncertainty or questions about any Competition shall make sure to contact the Company or its designee through the procedures prescribed by the Company as posted on the Site.
１１.The Company shall not be obligated to pay any remuneration or other consideration other than those prescribed in the following Article for any act of the Participants as prescribed in paragraphs hereof.

Article 3 Reward and Vesting of Rights

１.Unless otherwise provided for, any Participant shall satisfy the following requirements in order to be entitled to receive a reward in any Competition that offers a reward:

(１)To be a winner;
(２)To agree to transfer to the Host and the relevant transferee of rights in such Competition all transferable rights, such as copyrights, rights to obtain patents and know-how, etc. in and to all analysis and prediction results, reports, analysis and prediction model, algorithm, source code and documentations for the model reproducibility, etc., and the Submissions contained in the Final Submissions and Submissions for Final Judgment (including the rights as prescribed in Article 27 and Article 28 of the Copyright Act and the rights to obtain patents; hereinafter referred to as the "Rights");
(３)To agree that any relevant transferee of rights exclusively has the right to use the know-how contained in the Final Submissions and Submissions for Final Judgment for its own business and other purpose without any restriction;
(４)To agree not to exercise moral rights to the Rights against the relevant transferee of rights;
(５)To enter into an agreement for the transfer of the Rights with the relevant eligible transferee of rights, including the agreement to the matter in the preceding three (3) items and other reasonable provisions;
(６)To have the personal identity of such Participant verified by the Company.
(７)Not to breach any provision of these Terms and the Terms of Use.

２.Any Winner Candidate shall, after having received a notice from the Company that he/she is nominated as a winner candidate, submit the Submissions for Final Judgment on or before the designated date and communicate the matters requiring confirmation or response in relation to the Final Submissions and the Submissions for Final Judgment to the Company on or before the designated date, in accordance with the instructions of the Company. The Company shall carry out the final judgment based on such matters requiring confirmation or response. If the Company receives no confirmation or response satisfactory to the Company on or before the designated date, the Company may exclude such Winner Candidate from the subject of the final judgment and the Winner Candidate shall not raise any objection thereto.
３.If the Company considers that the Final Submissions or Submissions for Final Judgment need to be amended or modified, or there occur any additional matters requiring confirmation, in the course of the final judgment, any Winner Candidate shall take action or make response in relation to the matters that require amendment, etc. or the detailed information on the matters requiring confirmation, on or before the designated date in accordance with the instructions of the Company. If the Company receives no action or response satisfactory to the Company on or before the designated date, the Company may exclude such Winner Candidate from the final judgment and the Winner Candidate shall not raise any objection thereto.
４.The Company shall determine the Winner through the final judgment and inform the Winner to that effect.

Article 4 Confidentiality

１.Participants shall treat any information, data, or such contents as insights and deliverables transmitted through the service where they receive from the Company in relation to each Competition (hereinafter referred to as the "Company-Provided Information") as confidential information and shall not disclose the same to any third party and use the same for any purpose other than for such Competition and purpose specified by the Company separately; provided, however, that the confidential information shall not include any information that falls under any of the following items:

(１)Information that is known to the public at the time of the disclosure;
(２)Information that is already possessed by the Participant at the time of the disclosure (only in the case where such Participant may demonstrate such fact by reasonable means);
(３)Information that becomes known to the public without the fault of the Participant after the disclosure;
(４)Information that is independently developed by the Participant without reference to any information as disclosed (except for those Submissions of the person eligible for a prize which are evaluated); or
(５)Information that is rightfully disclosed by any third party having a right to do so without the obligations of confidentiality (only in the case where such Participant may demonstrate such fact by reasonable means).

２.Any Winner shall handle his/her Final Submissions and Submissions for Final Judgment in the same manner as prescribed in paragraph 1 hereof.
３.Any Participant may publish any algorithms that they have developed as well as any other materials they have created in connection with their participation in a Competition (including Final Submissions and Submissions for Final Judgment) after that Competition in accordance with the Competition Information Disclosure Policy (hereinafter, "Information Disclosure Policy") posted on the Site. However, Participants shall observe the following matters when publishing information and may not publish any materials prohibited by the Information Disclosure Policy:

(１)Clarify that the materials were created in connection with participation in the Competition;
(２)Give credit in accordance with the notation method prescribed in the Information Disclosure Policy when the materials to be published contain part of a dataset; and
(３)Clarify the location accessible to all Participants (including but not limited to the Competition forum and other locations designated by the Company) where the materials are published (including links, etc.) if publishing materials outside the Competition forum.

４.Any Participant shall delete or return to the Company the Company-Provided Information (excluding the information prescribed in paragraph 3) immediately after the completion of a Competition.
５.If there is any separate arrangement in relation to the confidential information in each Competition, the provisions of such arrangement shall prevail over the provisions of these Terms.
６.If any dispute occurs between the Host or other third party and the Company due to the breach by any Participant of the provisions of this Article and such other party makes any claim against the Company, such Participant shall compensate for any damage, loss, expenses (including, but not limited to, attorneys’ fees), lost profits and lost revenues, etc. incurred by the Company.
７.The provisions of this Article shall survive the termination of the relevant Competition or the Participant’s completion of the procedures for withdrawal from the service of the Company, with respect to the Company-Provided Information and the Winner’s Final Submissions and Submissions for Final Judgment for a period of five (5) years thereafter.

Article 5 Prohibited Acts of Participants

１．The Company shall prohibit Participants from engaging in any of the following acts in any Competition:

(１)An act of cracking, cheating, spoofing other misconduct;
(２)An act of redistributing data files included in the dataset;
(３)An act of directly communicating to, consulting with, making a request to, soliciting or responding to solicitation or other activities to other Participants or the Host (other than the Company) without the involvement of the Company;
(４)Any profitmaking activities using the Competition (including solicitation or scouting activities, and use for a third party in educational business, etc.) without the prior approval of the Company in writing or any other manner specified by the Company;
(５)Transfer, offering as collateral or other disposition of the status as a Participant or the rights or obligations as a Participant (except with the prior written consent of the Company); and
(６)Acts that infringe upon the intellectual property rights or any other rights of third parties; and
(７)Any other act in breach of the Terms of Use.

２.If the Company deems that a Participant engages in any of the prohibited acts as prescribed in the preceding paragraph, the Company may, without prior notice to the Participant, disqualify the Participant from the Competition in which the Participant participates, temporarily suspend the Participant from using the service of the Company, withdraw the Participant’s membership, claim damages from the Participant or take any other measures deemed necessary by the Company.

Article 6 Modification of Terms

１.The Company may modify, add or delete any provisions of these Terms from time to time without the approval of the members.

May 28, 2021