Franz Engel & Marion Lauschke 
Ikonische Formprozesse [PDF ebook] 
Zur Philosophie des Unbestimmten in Bildern

The term
iconic form processes refers to phenomena that produce transitions between natural and symbolic forms. For example, the fire-scarred surface of a bronze artwork produces effects transcending the realm of artistic intention. When a work is created and perceived, the genesis of the image also invariably involves a “recession into the implicit” (John Dewey). This volume furnishes the foundations for a theory of iconic form processes.