The invention provides an
endoscope-based
monocular high-precision quantitative defect detection device, and relates to the technical field of industrial detection, the
endoscope-based
monocular high-precision quantitative defect detection device comprises an
endoscope, the endoscope is provided with a first hard shell, a second hard shell and a soft shell, the surface of the first hard shell is provided with an automatic calibration detection mechanism, the automatic calibration detection mechanism comprises a connector, and the connector is connected with the endoscope. The automatic calibration detection mechanism further comprises an
interface position, a controller, a monitor, a computer, an
optical fiber, a
signal transmission cable, an
image sensor and an objective lens, an endoscope is put into a detected object to take a picture, a picture matrix is segmented, a definition
evaluation function is evaluated for a small picture target area in the center, whether the area reaches the optimal definition or not is judged, and if yes, the object is detected. And if the optimal definition
evaluation result is reached, judging that the
object distance of the measured target is available data, namely a picture with the optimal definition, and if the optimal definition
evaluation result is not reached, continuing to move the lens of the endoscope until the optimal definition
evaluation result is found so as to find the clearest picture.