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Keywords from Image Description:
Otto Scheller B. de Otto Scheller deutscher Ingenieur und Erfinder en Otto Scheller german engineer and inventor Otto Scheller Author derivative work MagentaGreen other versions Druckraster verringert Belichtungs und Kontrastverbesserung Umwandlung in Graustufen Bildzuschnitt Vielfaches von px Photoshop Speicheroptionen