用Matlab计算一幅二值图像中目标的面积（也就是像素数表示）,如何计算?

sum(c(:))试一下。我猜结果应该是1710。
你doc bwarea看一下,有下面这些话
total = bwarea(BW)
Description
total = bwarea(BW) estimates
the area of the objects in binary image BW。 total is
a scalar whose value corresponds roughly to the total number of on pixels
in the image, ****but might not be exactly the same because different
patterns of pixels are weighted differently****。