Task: Sentiment Analysis
Input (English): Well researched and tolerably convincing . This is a very well researched book.  The author has taken great pains to measure and analyze Vermeer's paintings, finding a striking feature that many of them, when back-projected through the perspective view point at the size of the painting, imply a consistent location of a back wall to the common room used in the pictures.  The author asserts that the only reasonable explanation for this coincidence is that Vermeer used a camera obscura for at least some of the layout of his paintings.    This comes off as very plausible, though the analysis is limited to paintings that include a tiled floor.  It would have been interesting to see this work extended through photogrammetry of objects of known sizes in the paintings (chairs, musical instruments, etc) and applied to more of the paintings.    I think the only real failing in the argument is that Vermeer could have could have had the skill to paint perspective of this quality, and therefore not needed the aid of a camera.  As pointed out in the text, he was not bound to perfect accuracy; there are some deviations
Output (English): POS