STRIP SHAPE DETERMINING APPARATUS FOR METAL STRIP, ROLLING MILL, AND DETERMINATION METHOD

The present invention provides a strip shape determining apparatus for a metal strip and a rolling mill, and a determination method that are less likely to be affected by slight disturbance and a small obstacle generated suddenly than in conventional ones. A strip shape determining apparatus for a rolled metal strip 1 includes: cameras 61, 62, 63 and 64 that are installed so as to capture images including areas where band shaped reflection light that crosses the rolled metal strip 1 in the strip width direction is visible; and an image processing computer 80 that determines the strip shape of the metal strip 1 on the basis of the images captured by the cameras 61, 62, 63 and 64. The image processing computer 80 divides the area in each image into a plurality of segments in the strip width direction of the metal strip 1, and on the basis of index information representing an area-related size of each segment formed by the division, transfers, as a signal, information corresponding to the distribution in the strip width direction of strip elongation in the rolling direction.