Aiming at efficient extracting problem of copper alloy region of interest（ROI）sample

a set of complete methods for copper alloy sample ROI extraction is proposed

extracts ROI problem.The problem can be divided into two steps:the first step is to extract seed point that is related to the background

and in the second step

the ROI which is unrelated to the background is determined

and further the SBRE method based on seed point is put forward.On the complex background

HSV color model is firstly established in SBRE method

and then the seed point is determined by locating the rectangle inside the copper cross-section through constantly updating steps to shrink the research range and then seed point is determined

finally the ROI is determined.Actual test results prove this method is accurate and fast.