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{"sheet":"ラスタ画像","index":0,"n_rows":56,"n_cols":35,"rows_kept":56,"cut":false,"hidden":false,"merged":[[0,0,0,40],[20,1,23,4],[20,5,23,8],[20,9,23,12],[20,13,23,16],[2,18,16,40],[32,1,35,4],[32,5,35,8],[32,9,35,12],[32,13,35,16],[24,1,27,4],[24,5,27,8],[24,9,27,12],[24,13,27,16],[28,1,31,4],[28,5,31,8],[28,9,31,12],[28,13,31,16]]}
["JPEGやPNGなどビットマップ（ラスタ）画像は、画素を並べた画像で、画素の集合をデータとして持つため、拡大するとジャギーが目立ち、解像度を上げるとデータ量が増大する。\n実習１．Range（B2:Q17)に適宜数値1を入力せよ\n実習２．Range（B21:AI36)に色表現をさせ、精緻な画像に必要な要素を答えよ。\n実習３．Range（B40:Q55)に色表現をさせなさい。\n\n"]
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