今回はDeepLearningをする際に学習データ用の画像を収集することがあると思いますが、今回は、Google画像検索を使って簡単におこなう小ネタです。
Google画像検索で取得したい画像がリスト表示されたところで、下記のjavascriptをブラウザ（Google Chrome推奨）の開発者ツールのコンソールで実行すると、検索結果として表示された画像のソースURLがCSVファイルとしてダウンロードできます。
// 検索結果のHTMLソースから各検索結果のアイテムごとにソースURLを取得し配列化
urls = Array.from(document.querySelectorAll('.rg_di .rg_meta')).map(el=>JSON.parse(el.textContent).ou);
// 改行コードを各行末尾に付けたCSVとして吐き出す
window.open('data:text/csv;charset=utf-8,' + escape(urls.join('\n')));
上記の実行によって、表示されたパンダの画像のソース画像のURLリストがdownload.csvという名前のファイルとしてダウンロードされます。
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