107Setting CheckersChapter 66.8.2 What Is Feature Extraction?Feature Extraction is a function to count the number of the clusters (called as an object) of a certain size withinthe area. If the number of counted objects is within the preset limits, the object will be judged as "OK", if thenumber of counted objects is out of the preset limits, the object will be judged as "NG". The detected objects aresorted and the "features" of clusters from 1st to 99th are extracted.Area Shape Rectangle/Circle/Polygon (The number ofsettable vertices: 3 to 16)The Area SizeAdjustment function isavailable.The number of Settable Mask Areas Up to 16.The Range of Measurement Results Detection Counts: 0 to 2000Area 1 to 245760Gravity X 0 to 511.9Gravity Y 0 to 479.9Automatic detectionProjec. W in X 1 to 512Projec. W in Y 1 to 480Perimeter 1 to 245760Feature Data and MeasurementResults RangeAngle -89.9 to 90.0, 180 *1Possible to switchDetect/Not Detect(Under the SearchMethod tab)Detection count = 3Features of object 1.....Features of object 2.....Features of object 3.....• *1For rectangle-, circle- or triangle-shaped objects, the PV310 cannot compute the angle of the principalaxis. (The device might possibly output the angle of the principal axis “180.0", but you cannot use thedata due to its incorrectness.)• If the number of detected objects exceeds 2000, inspection error occurs and an error code No. E0073 isdisplayed in the message area (No ERROR signal will be output.). In this case, Detection Count "0" isoutput.