>This article makes it sound like Spatial Pyramid Pooling is something new and amazing
Hardly, the paper specifically states "Spatial pyramid pooling ... is one of the most successful methods in computer vision" and "SPP has long been a key component in the leading and competition-winning systems for classification".
Hardly, the paper specifically states "Spatial pyramid pooling ... is one of the most successful methods in computer vision" and "SPP has long been a key component in the leading and competition-winning systems for classification".