A processing plant for making products defined by articles in the form of rolls of the tissue industry that is rolls of toilet paper and/or kitchen paper, comprising: - at least one operating line including at least one upstream section for making the articles, in the form of a log saw for cutting rolls off respective elongate logs; - at least one respective packaging section, for primary packaging, in the form of a packing section where the articles or rolls are packed; - at least one or more further packaging sections, in the form of at least one bagging section where the packs are placed in bags, and/or one palletizing section where the packs or bags are placed on pallets; - a conveying section, by which the products are transported between one section of the plant and another downstream and in which the rolls are supported on a corresponding supporting surface; - electronic process control means for controlling the functioning of the plant sections; characterized in that it comprises at least one unit for detecting defective products; said unit for detecting defective products comprising camera means (14, 16, 18) for capturing one or more images of the respective product; the camera means comprising a corresponding camera which is positioned above the product conveying means and whose respective lens is directed perpendicularly or substantially perpendicularly to the product supporting surface of the conveying means; the camera means further comprising a first and a second camera (16, 18) which are respectively positioned above the product conveying means and whose respective lens (16', 18') is inclined at a respective angle to the product supporting surface of the conveying means; said first camera whose respective lens is inclined at a respective angle to the product supporting surface of the conveying means having the lens which is directed in the direction opposite to the product feed direction, said second camera whose respective lens is inclined at a respective angle to the product supporting surface of the conveying means, having the lens which is directed in the same direction as the product feed direction; and in that said camera means (14, 16, 18) have the respective lens (14', 16', 18') which are positioned at the transverse centre line of the product supporting surface of the conveying means. - at least one operating line including at least one upstream section for making the articles, in the form of a log saw for cutting rolls off respective elongate logs; - at least one respective packaging section, for primary packaging, in the form of a packing section where the articles or rolls are packed; - at least one or more further packaging sections, in the form of at least one bagging section where the packs are placed in bags, and/or one palletizing section where the packs or bags are placed on pallets; - a conveying section, by which the products are transported between one section of the plant and another downstream and in which the rolls are supported on a corresponding supporting surface; - electronic process control means for controlling the functioning of the plant sections; characterized in that it comprises at least one unit for detecting defective products; said unit for detecting defective products comprising camera means (14, 16, 18) for capturing one or more images of the respective product; the camera means comprising a corresponding camera which is positioned above the product conveying means and whose respective lens is directed perpendicularly or substantially perpendicularly to the product supporting surface of the conveying means; the camera means further comprising a first and a second camera (16, 18) which are respectively positioned above the product conveying means and whose respective lens (16', 18') is inclined at a respective angle to the product supporting surface of the conveying means; said first camera whose respective lens is inclined at a respective angle to the product supporting surface of the conveying means having the lens which is directed in the direction opposite to the product feed direction, said second camera whose respective lens is inclined at a respective angle to the product supporting surface of the conveying means, having the lens which is directed in the same direction as the product feed direction; and in that said camera means (14, 16, 18) have the respective lens (14', 16', 18') which are positioned at the transverse centre line of the product supporting surface of the conveying means.