24 types of image enhancement filters are provided to significantly compensate for changes in inspection conditions caused by work piece finish and external environments. KEYENCE's original algorithms generate optimal images for inspection to improve stability and reduce scrapping of non-defective workpieces due to inspection error.
Eliminates noise information within the inspection region and only highlights linear information. This filter is particularly effective for linear defect inspection for work pieces that have a rough surface conditions.
A linear stain cannot be detected due to minute rough edges on the background.
Only linear stains are extracted by ignoring background noise.
Eliminates or, in contrast, extracts noise having a specified area or smaller. This filter is effective when a rough background hinders image processing or to detect subtle stains.
Characters cannot be extracted properly due to white and black fibres contained in the cardboard.
Only bright and dark noise are removed and the printing condition remains unaffected.
Minute flaws exist on the background having printed characters and surface irregularities.
Only black stains smaller than the specified area are extracted.
Expands the density distribution within the inspection region to increase the contrast of an image. This filter stabilises inspection when gradation necessary for image processing cannot be obtained due to the reflectance of workpieces.
The location is at the back of the workpiece, so the light intensity is insufficient, which makes it impossible to recognise the circuit board pattern.
The circuit board pattern can be recognised clearly. Because the filter determines the expansion width from the density distribution within the inspection region, images without overexposure and underexposure can be captured.
Cancels shading or uneven brightness occurring on the workpiece surface to optimise images for inspection. Even if shading conditions change every time, this filter corrects images in real time to only extract defective sections.
Shading occurs on the workpiece surface due to the shape consisting of curves.
Only stains are extracted by cancelling random shading in real time.