Method for measuring metallographic ultra-long-sized region by Photoshop software

The invention belongs to the field of metallographic detection of materials and particularly relates to a method for measuring a metallographic ultra-long-sized region by Photoshop software, the method is simple and low in detection cost, actual physical length can be measured through steps of image acquisition, panoramic photo synthesis, scaleplate addition and length measurement, and quantitative measurement of the metallographic ultra-long-sized region is finished by the common Photoshop software. A special software analysis instrument does not need to be purchased, so that the manufacturing cost is low. When a panoramic photo is made, the software automatically synthesizes the panoramic photo without artificially appointing a pixel value of an overlapped region of adjacent photos, so that the making process is simple and the making efficiency is high. When the length is measured, the scaleplate addition process is finished by adjusting the image resolution of a measured image, a measurement result is the physical length, and subsequent conversion from the pixel length to the physical length does not need to be carried out, so that the automation degree is high. The labor intensity of metallographic detection personnel is greatly reduced and the accuracy of the detection result is improved.