Depth of Field and Depth of Focus: Identify Which Plane May Move
Clarify whether a focus tolerance concerns movement of the inspected object or the position of the camera's image plane.
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Machine Guide Library — Page 14
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Telecentric Imaging: Separate Magnification Stability from Sharpness
Review apparent-size change with object depth separately from whether a camera image remains visually sharp.
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Lens Distortion: Retain the Field-Position Map in a Dimensional Review
Retain the spatial distortion map and the acquisition conditions before extending a centre calibration to an entire image.
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MTF Curves: Compare Contrast at the Relevant Spatial Frequency
Read a lens MTF curve at the relevant detail size, field position and optical conditions instead of treating its label as a task guarantee.
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Diffraction and Aperture: Closing the Iris Has a Resolution Boundary
Use a theoretical diffraction calculation to explain why a smaller aperture cannot improve every imaging requirement at once.
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Nyquist Sampling: A Visible Pattern Is Not Automatically a Reliable Feature
Keep periodic-feature spacing and its position relative to the pixel grid when reviewing a sampling demonstration.
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Digital Zoom and Optical Detail: Upscaling Does Not Add a New Observation
Distinguish a larger displayed image from newly acquired object detail when comparing camera screenshots.
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Global and Rolling Shutters: Keep Row Timing with Moving Shapes
Compare the exposure timing of image rows before interpreting moving shapes captured by different shutter architectures.
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Exposure Time and Motion Blur: Calculate the Object Travel during the Image
Calculate projected object travel during effective exposure while keeping blur tolerance as a separate inspection requirement.
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Trigger Delay and Motion Blur: Position Shift and Smear Are Different Effects
Calculate trigger-to-exposure displacement separately from the object travel accumulated during exposure.
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Camera ROI: Cropping Transmitted Pixels Does Not Change Lens Magnification
Identify the remaining object coverage and unchanged physical sample spacing when a sensor region of interest is reduced.
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Pixel Binning and ROI: Combining Samples Differs from Selecting a Region
Determine whether a smaller image combines pixel values or simply retains a smaller selected sensor region.
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Remote Machine Support: Agree Permission and Access Scope Before Connecting
Plan a machine remote-support session with an identified approver, permitted access and changes, information boundaries and a documented closure record.
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Camera Gain and Exposure: Amplifying a Signal Differs from Collecting Light
Keep electronic amplification distinct from the duration and illumination that determine collected light.
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Image Bit Depth and Dynamic Range: Preserve the Scope of the Digital Values
Separate output code levels from the sensor and processing evidence needed to assess useful image contrast.
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Packed Pixel Formats: Calculate Image Payload from the Actual Encoding
Calculate image-data payload from the complete pixel format, including packing and padding, rather than nominal sample bit depth alone.
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Bayer Images and RGB Pixels: Keep Reconstruction in the Colour Comparison
Identify raw colour-filter samples and reconstructed RGB values before comparing colour-inspection images.
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Monochrome and Colour Cameras: Define Which Information the Inspection Needs
Choose intensity or spectral-discrimination evidence from the actual inspection question before comparing monochrome and colour cameras.
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White Balance and Colour Judgement: Keep the Illuminant with the Result
Preserve illumination and channel-gain settings before treating colour images as comparable inspection evidence.
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Cross-Polarized Camera Lighting: Separate Glare Suppression from Colour Fidelity
Keep crossed-polarizer geometry and the required surface information together when reviewing glare suppression.
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Backlighting for Silhouettes: The Outline Does Not Establish Surface Appearance
Decide whether a backlit silhouette supplies the projected-geometry evidence needed by the actual task.
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Dark-Field Lighting: Define the Scattered-Light Feature Being Sought
Define which low-angle scattered-light feature a dark-field trial is intended to reveal.
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Bright-Field Lighting: Draw the Reflection Path before Interpreting a Bright Patch
Keep reflection geometry with a bright-field observation before assigning an intensity patch to material or print variation.
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Diffuse Dome Lighting: Review the Range of Incident Directions
Evaluate broad directional illumination from a dome against the curved-surface feature the image must retain.
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