User manual OMRON F400 06-1999

[. . . ] Z135­E1-1 F400 Color Vision Sensor OPERATION MANUAL F400 Color Vision Sensor Operation Manual Produced June 1999 i Notice: OMRON products are manufactured for use according to proper procedures by a qualified operator and only for the purposes described in this manual. The following conventions are used to indicate and classify precautions in this manual. Always heed the information provided with them. Failure to heed precautions can result in injury to people or damage to property. ! DANGER Indicates an imminently hazardous situation which, if not avoided, will result in death or serious injury. ! [. . . ] 10 Direction : B Color : LightDarkB Edge level : [50]% Noise level : [20] Position : 0. 000 [0. 000 : 511. 000] End 2 3 3. When the evaluation criteria changes have been completed, move the cursor to End and press the ENT Key. The evaluation criteria will be saved and the display will return to the window shown in step 1. 3-3-5 Area and Center of Gravity, and Center of Gravity and Axis -- Filter/Pickup -- Angle Density images with 256 gradations are read by the Camera. Binary processing involves separating these density images into black pixels (picture elements) (0) and white pixels (1). The F400 uses the white pixels to measure the object. Area and Center of Gravity The area and center of gravity of white pixels is found. Measurement region Center of gravity of white pixels Area of white pixels 67 Measurement Methods Section 3-3 Center of Gravity and Axis Angle The center of gravity and axis angle for the white pixels is found. Finding the axis angle increases processing time. Select the area and center of gravity method when the axis angle is not required. Measurement region Axis angle for white pixels Center of gravity for white pixels Area of white pixels Procedure Color Filter Mode 1. Set the evaluation criteria. Note 1. The area and center of gravity, or the center of gravity and axis angle processing selected here is for object measurement. Separate processing can be set for position compensation. Refer to 3-2-5 Area and Center of Gravity, and Center of Gravity and Axis Angle. Measurement methods are changed and cleared in the Region Settings Window. 50 68 Measurement Methods Section 3-3 Setting Binary Levels (Color Filter Mode Only) Set the level for processing gray images with 256 gradations into binary images. Since the F400 uses the white pixels to measure the object, adjust the binary level so that the measurement object turns into white pixels. OK: The measurement object is converted to white pixels. Binary level settings Upper limit Lower limit Binary level Upper [255] Lower [128] Reverse Auto OK Upper limit of binary level Lower limit of binary level Move the cursor to Reverse and press the ENT Key to reverse black and white pixel display. Move the cursor to Auto to have binary levels set automatically by the F400. :Move:Change Wrong Binary level Upper [255] Lower [128] Reverse Auto OK :Move:Change The binary level can also be set so that only the intermediate density becomes the subject for measurement. However, the level cannot be set to exclude this intermediate level. OK Wrong White (for measurement) Density Black 1. Move the cursor to Binary and press the ENT Key. The Binary Level Settings Window will be displayed. Area and center of gravity Binary Region Conditions 1 2. Move the cursor to the upper limit and use the Left and Right Keys to change the numeric value. 69 Measurement Methods 3. Change the lower limit the same way. Section 3-3 Binary level 2 Upper [255] Lower [128] Reverse Auto OK 3 4 :Move:Change 4. Move the cursor to OK and press the ENT Key. [. . . ] These filters can be customized for the color to be emphasized. Refer to Introduction Manual (Z131) for details. 146 Glossary Color Pick Up Specified colors can be picked up from a color image. Color images are converted to binary images and processed by the F400. The selected color will be converted to white (1) pixels, all other colors will be converted to black pixels (0), and measurements will be performed for the white areas only. [. . . ]