Machine Vision Lens for Metal Can and Can-End Inspection: How to Check Rim Geometry, Lid Position, Pull-Tab Orientation, Dents and Edge Defects

Metal can and can-end inspection is a widely used machine vision application in beverage, food packaging and automated container manufacturing because the top geometry of a can contains several critical features that can be checked from a single well-designed camera view. Manufacturers may need to verify rim geometry, confirm whether the lid is centered correctly, measure pull-tab orientation, detect visible dents or deformation around the can end, and identify edge abnormalities before products continue through filling, seaming, packaging or final quality-control stages. Selecting the correct machine vision lens for metal can inspection is important because the complete circular can end may need to remain inside the image while comparatively small rim deviations or localized edge defects still require sufficient optical resolution.

Buyers searching for a machine vision lens for can inspection, can-end inspection camera lens, metal can rim inspection, pull tab inspection camera, lid position inspection system, beverage can vision inspection, or industrial camera lens for can defect detection are usually dealing with several inspection scales at once. Detecting whether a lid exists is relatively simple. Measuring whether a circular lid is offset relative to the can rim requires greater geometric accuracy. Detecting a small damaged section around the circumference can require still more pixels on the feature. For this reason, Machine Vision Lens selection should be driven by the smallest relevant rim, lid, tab or edge condition rather than by can diameter alone.

The Kyptec Automation® Machine Vision Lens collection provides conventional 5 MP, 10 MP and 25 MP lens families across multiple focal lengths and industrial camera formats, including 2/3", 1" and larger-format options. This breadth gives canning-machine OEMs and vision-system integrators practical flexibility when designing complete-can-end views, localized high-detail rim inspection stations or systems that need more working distance around conveyor and handling equipment.

Start With the Smallest Can-End Defect That Must Change the Inspection Decision

The first optical-design question should not simply be, “What is the can diameter?” A more useful question is, “What is the smallest physical abnormality that must cause rejection?”

A missing lid or grossly deformed can end creates a large image difference and can normally be recognized with comparatively modest spatial sampling. A slight lid offset, localized rim deformation or small damaged edge occupies much less of the image.

The Machine Vision Lens should therefore be selected around the most demanding geometric tolerance. If a small rim discontinuity must be detected, the final FOV should allocate enough original sensor pixels to that defect for reliable classification.

Complete Can-End Inspection Begins With the Circular Reference Geometry

Many can-end inspection tasks become easier when the outer circular geometry is used as a common reference.

The system can first locate the visible can rim or another repeatable circular boundary. Lid position, pull-tab position and localized edge defects can then be evaluated relative to the same coordinate system.

This is more robust than measuring every feature against fixed image coordinates because normal conveyor-position variation can move the entire can within the field.

The Machine Vision Lens should provide clear enough circumference information to establish the can center and effective radius repeatably.

Rim Geometry Inspection Requires Coverage Around the Full Circumference

A circular rim defect can occur at any angular position.

A system that resolves the rim clearly at the top of the image but poorly toward another part of the circumference can create inconsistent inspection sensitivity.

For metal can rim inspection, the complete usable circumference should therefore receive adequate spatial detail.

Lens qualification should include representative defects at several angular positions, particularly when cans can arrive with arbitrary rotational orientation.

Pixels per Millimetre Should Be Calculated at the Rim

A useful simplified starting relationship is:

Pixels per millimetre = sensor pixels across the inspection direction ÷ physical field of view in millimetres

If 4,000 pixels cover a 100 mm physical field, sampling is approximately 40 pixels/mm. A 0.5 mm physical feature corresponds to roughly 20 pixels before practical optical and image-processing effects are considered.

If the FOV increases to 200 mm, sampling falls to approximately 20 pixels/mm.

This relationship explains why unnecessarily large background regions can weaken rim and edge inspection even when the camera itself has a high pixel count.

Rim Circularity and Local Rim Damage Are Different Problems

A can rim may be globally deformed, producing an oval or otherwise distorted outline, or it may contain one small local damaged section.

Global deformation affects a relatively large portion of the circumference and can often be evaluated using fitted circular or elliptical geometry.

A local rim defect affects only a short arc.

The Machine Vision Lens should therefore be selected to preserve enough local edge information if small rim abnormalities are part of the acceptance criteria.

Lid Position Should Be Measured Relative to the Can Center

A correctly assembled lid should occupy an expected position relative to the visible can-end geometry.

If the lid is offset, the measured centers of the can and lid may no longer coincide within the permitted tolerance.

A machine vision lens for lid position inspection should therefore provide enough detail to locate both geometries in the same image.

This allows lid position to be evaluated as a relative measurement rather than simply asking whether a lid-shaped feature is visible.

Lid Presence and Lid Centering Are Not the Same Inspection

Presence inspection asks whether the component exists.

Centering inspection asks where that component is located relative to another physical reference.

A lid can be present but still be positioned outside the permitted geometric tolerance.

The Machine Vision Lens should therefore be chosen according to the tighter positional requirement if both presence and placement must be inspected.

A 16 MM 10 MP Lens Can Support Broader Complete Can-End Views

For compatible 2/3" industrial camera systems, the Kyptec Automation® KL-1226 16 MM Machine Vision Lens With 10 MegaPixel & 2/3" Format Lens provides 16 mm focal length, 10 MP resolution, C-mount, 2/3" image format and an F2.8–16 aperture range. Kyptec Automation® lists machine vision, factory automation, special-purpose machinery and food/beverage processing among its major application areas.

This focal-length class can be evaluated where the complete can end plus reasonable positional margin must remain visible. Final suitability should still be calculated from the actual camera sensor, working distance, can diameter and minimum rim or edge feature that must be detected.

A 25 MM 10 MP Lens Can Increase Can-End Sensor Utilization

Where the required can-end region can fit within a tighter physical field, the Kyptec Automation® KL-1228 25 MM Machine Vision Lens With 10 MegaPixel & 2/3" Format Lens provides 25 mm focal length, 10 MP resolution, C-mount, 2/3" format and an F2.8–16 aperture range. Its official application list also includes factory automation, special-purpose machinery and food/beverage processing.

Tighter legitimate framing can devote more sensor pixels to the can circumference, lid edge and pull-tab geometry, which is useful where geometric inspection is more demanding than broad conveyor coverage.

Pull-Tab Orientation Is an Angular Measurement

A pull tab is a directional feature.

The inspection system can establish the center of the can end and determine the tab's major axis, characteristic end position or another repeatable geometric feature.

The resulting angle can then be compared with the permitted orientation range.

A machine vision lens for pull-tab orientation inspection should provide enough complete tab geometry for angular estimation rather than only showing a small portion of the component.

Pull-Tab Position and Orientation Should Be Measured Independently

A pull tab can have the correct angular orientation but still be displaced from its expected position.

It can also occupy the expected location while being rotated incorrectly.

These conditions should therefore be treated as separate measurements.

The Machine Vision Lens should preserve enough detail for both the tab location and its directional geometry to be calculated relative to the can center.

Tab Orientation Inspection Benefits From a Stable Can Coordinate System

If the complete can rotates in the image, the tab may appear at a different global camera angle even though its orientation relative to the lid remains correct.

For this reason, the system should determine the relevant can or lid coordinate system before evaluating the tab.

The lens should provide enough surrounding can-end geometry to support this relative analysis rather than examining the tab in isolation.

Dents Can Change Both Global and Local Geometry

A dent near the can end may change a long section of the visible circumference, or it may appear as a small local inward deformation.

Large dents can often be identified from a clear deviation in the expected outer profile.

Smaller dents require more pixels along the edge so the deviation remains distinguishable from normal edge localization variation.

The Machine Vision Lens should therefore be qualified using dents near the real minimum rejectable size.

Edge Defect Inspection Should Be Defined by Arc Length and Depth

A localized can-edge defect has at least two useful geometric dimensions: how much of the circumference it affects and how far the edge departs from the expected profile.

A long shallow deformation may require a different detection strategy from a short but deep notch-like abnormality.

The optical requirement should therefore be based on the smallest combination of defect width and depth that must trigger rejection.

Dented Rims Should Not Be Evaluated Only by Diameter

A can end can retain approximately the correct maximum diameter while one part of the rim is visibly deformed.

Simple overall diameter measurement may therefore miss localized damage.

Complete contour inspection is more appropriate when the rejection requirement includes dents, flattened sections or local edge irregularity.

Circular Fitting Can Establish a Reference for Local Defects

Where most of the can rim remains undamaged, a fitted circular reference can help identify local deviations from the expected circumference.

The inspection system can compare measured edge points with that reference and determine whether any local region exceeds the acceptable deviation.

The Machine Vision Lens must provide enough reliable edge points around the circumference for the reference itself to remain stable.

Can Diameter Determines FOV, but Defect Size Determines Resolution

A 66 mm or other diameter can may fit easily inside the image, but this does not automatically mean the optical setup can resolve the smallest relevant rim defect.

The complete-can FOV determines how much physical space the camera must cover.

The smallest lid offset, tab-position tolerance or rim defect determines the required pixels per millimetre.

Both values must be evaluated together before choosing focal length.

Larger FOV Is Not Automatically Better for Can Inspection

Adding generous empty space around the can can make machine setup appear safer because the product is unlikely to leave the image.

However, excessive FOV reduces the percentage of sensor pixels used by the actual can.

The stronger optical design includes only enough margin for legitimate conveyor-position variation and machine tolerance.

Every unnecessary millimetre of scene width can reduce the spatial sampling available to the can edge.

Multiple Cans in One Image Create a Resolution Trade-Off

Some inspection stations may attempt to inspect several can ends simultaneously.

This requires a wider field and divides the available sensor area among multiple products.

If the smallest rim defect or tab-angle requirement does not change, the system should calculate whether each can still receives enough original pixels.

Multi-can throughput should therefore be balanced against the required inspection detail.

High-Resolution Optics Can Help When Coverage Cannot Be Reduced

Where several cans or a wider mechanical area must remain visible, reducing FOV may not be practical.

Higher total camera and optical resolution can then provide more spatial samples across the same physical region.

For compatible larger-format systems, the Kyptec Automation® KL-1240 25 MM Machine Vision Lens With 25 MegaPixel & 1.1" Format Lens provides 25 mm focal length, 25 MP resolution, C-mount and an F2.8–22 aperture range. The official Kyptec Automation® product page lists model KL-1240 and includes Machine Vision System & Factory Automation, Special Purpose Machines and Food/Beverage Processing among its major applications.

This type of configuration can be evaluated where wider can-end coverage and relatively small geometric tolerances need to coexist.

More Megapixels Are Useful Only When They Increase Pixels on the Can End

Moving to a higher-resolution optical system does not guarantee better inspection if the physical FOV is expanded proportionally.

The important question is whether the can rim, lid boundary and pull-tab geometry receive more original sensor samples.

The strongest approach is to establish the minimum legitimate FOV first and then use higher optical resolution to increase sampling of the actual inspection features.

Working Distance Influences Can-End Framing

Machine builders may need to mount the camera above guides, reject mechanisms or other conveyor hardware.

Working distance therefore becomes a practical mechanical constraint.

Focal length and sensor size should be selected together with this stand-off requirement so the desired can-end FOV is achieved without sacrificing excessive sensor utilization.

A 35 MM 10 MP Lens Can Support More Stand-Off in Suitable Geometry

For compatible 2/3" camera systems, the Kyptec Automation® KL-1230 35 MM Machine Vision Lens With 10 MegaPixel & 2/3" Format Lens provides 35 mm focal length, 10 MP resolution, C-mount, 2/3" image format and an F2.8–16 aperture range.

This focal-length class can be evaluated where the mechanical design benefits from greater stand-off while the resulting FOV still covers the required can-end diameter and positional tolerance.

Can Height Variation Can Affect Apparent Geometry

If cans are inspected from above and their top surfaces appear at different object distances, image scale can vary slightly in a conventional perspective imaging system.

For tight geometric measurements, product height and conveyor presentation should therefore remain reasonably controlled.

The lens should be focused and calibrated using the actual production configuration rather than an arbitrary development setup.

Camera Tilt Can Distort the Apparent Circular Can End

A circular can viewed obliquely can appear elliptical.

If the inspection is intended to measure circular geometry, lid concentricity or edge position, unnecessary camera tilt can complicate the measurement.

The imaging system should therefore use a controlled optical axis relative to the can end wherever practical.

Calibration can account for some geometric effects, but it cannot recover detail that was never optically resolved.

Reflective Metal Surfaces Require Stable Optical Geometry

Can ends are metallic and can produce strong specular reflections.

The purpose of this blog is Machine Vision Lens selection rather than illumination design, but buyers should recognize that unstable reflections can hide or exaggerate edge features.

The Machine Vision Lens should therefore be qualified in the final production geometry with the real can material and the intended camera position.

Optical resolution alone cannot compensate for a physically invisible edge caused by unsuitable viewing conditions.

The Entire Useful Can End Should Be Checked Across the Sensor

A lens should not be qualified only with a can centered perfectly in the image.

Conveyor variation can place the can closer to different parts of the field.

If dimensional or defect inspection is required across this range, representative borderline samples should be tested near all legitimate image positions.

This helps verify that the required edge detail is maintained across the usable field.

A 50 MM 25 MP Lens Can Support Localized High-Detail Rim Inspection

Some machines may use a dedicated inspection station where a single can-end region or smaller mechanical field can be tightly framed.

For compatible larger-format systems, the Kyptec Automation® KL-1244 50 MM Machine Vision Lens With 25 MegaPixel & 1.1" Format Lens provides 50 mm focal length, 25 MP resolution, C-mount and an F2.8–22 aperture range. Its official page includes machine vision, factory automation, special-purpose machinery and food/beverage processing among the major applications.

This type of longer-focal-length, high-resolution configuration can be evaluated where more sensor area should be devoted to localized rim, lid or pull-tab geometry and adequate working distance is available.

Different Can Diameters Should Be Evaluated Separately

A machine may process more than one can size.

The largest diameter often determines the required FOV, while the smallest can can create a different pixels-per-feature condition because it occupies less of the sensor.

Each can family should therefore be checked independently before one Machine Vision Lens configuration is standardized across multiple formats.

Product Rotation Is Useful for Some Features and Irrelevant for Others

A circular rim may be rotationally symmetric, so can rotation has little effect on the expected outer geometry.

A pull tab is not rotationally symmetric.

If cans can rotate freely, tab inspection should therefore use a relative can-centered coordinate system and evaluate whether the tab geometry itself meets the application requirement.

This distinction prevents the inspection logic from confusing global can rotation with actual tab misalignment.

Digital Zoom Cannot Recover Missing Rim Detail

Software enlargement can make a can edge appear larger on the display, but it does not increase the amount of optical information captured.

If a small rim defect occupies only a few original pixels, digital zoom enlarges those same samples.

Reliable can-end inspection therefore requires the necessary native detail through appropriate FOV, camera resolution, sensor format, focal length and Machine Vision Lens selection.

Final Qualification Should Use Borderline Can-End Defects

A severely crushed rim, missing pull tab or grossly displaced lid is useful during development, but such examples do not establish production capability.

Final validation should include lid offsets close to the acceptance threshold, pull-tab angles close to the permitted limit, minimum rejectable dents and localized rim defects near the actual production tolerance.

These samples should also be tested at different legitimate conveyor positions within the image.

Why Kyptec Automation® Is a Practical Choice for Metal Can and Can-End Inspection

Kyptec Automation® provides a broad Machine Vision Lens portfolio with conventional 5 MP, 10 MP and 25 MP lens families across multiple focal lengths and sensor formats. This gives canning-equipment OEMs and system integrators practical flexibility to match a Machine Vision Lens to can diameter, required FOV, smallest rim defect, tab-orientation tolerance, camera sensor size and mechanical working distance instead of relying on one general-purpose lens for every inspection station.

For compatible 2/3" systems, Kyptec Automation® KL-1226 16 MM Machine Vision Lens With 10 MegaPixel & 2/3" Format Lens can be evaluated for broader complete can-end coverage, while Kyptec Automation® KL-1228 25 MM Machine Vision Lens With 10 MegaPixel & 2/3" Format Lens can provide tighter framing where more sensor utilization is needed. Both models are verified as 10 MP C-mount Machine Vision Lenses with F2.8–16 aperture ranges.

Where higher total image sampling is needed, Kyptec Automation® KL-1240 25 MM Machine Vision Lens With 25 MegaPixel & 1.1" Format Lens provides a 25 MP high-resolution option for compatible larger-format systems. Kyptec Automation® KL-1230 35 MM Machine Vision Lens With 10 MegaPixel & 2/3" Format Lens can be considered where additional stand-off is desirable, while Kyptec Automation® KL-1244 50 MM Machine Vision Lens With 25 MegaPixel & 1.1" Format Lens provides a longer-focal-length high-resolution alternative for localized inspection.

The availability of several focal lengths and resolution classes makes Kyptec Automation® useful for OEMs designing can-end inspection systems with different conveyor layouts, can diameters and defect tolerances while remaining focused on the Machine Vision Lens requirements of the application.

Frequently Asked Questions About Machine Vision Lenses for Metal Can and Can-End Inspection

1. What is the best Machine Vision Lens for metal can-end inspection?

The correct Machine Vision Lens depends on can diameter, working distance, camera sensor size, smallest rim defect, allowable lid-position error and pull-tab inspection requirement. A complete-can view may favor a relatively broader FOV, while a dedicated rim-inspection station can use tighter framing. Kyptec Automation® offers multiple focal lengths and 10 MP and 25 MP resolution options, allowing the lens to be selected around the real inspection geometry instead of focal length alone.

2. How much resolution is required to inspect a can rim?

Start with the smallest rim deformation, notch, flat region or edge deviation that must trigger rejection. Calculate pixels per millimetre at the final can-end FOV and determine how many native sensor pixels represent that defect. A complete rim can look visually sharp while the minimum rejectable defect still occupies too little image information, so defect size should determine the resolution requirement.

3. Can machine vision measure whether a can lid is centered?

Yes. The system can locate the geometric center of the can rim and compare it with the detected center of the lid or another relevant circular lid feature. The Machine Vision Lens should provide enough edge information around both geometries for their relative offset to be measured consistently.

4. Can machine vision inspect pull-tab orientation?

Yes. The system can identify characteristic pull-tab geometry and calculate its angular direction relative to the can-end coordinate system. Reliable orientation measurement requires enough complete tab detail to establish the directional axis accurately, rather than viewing only a small isolated portion of the tab.

5. Can machine vision detect a dent around the can rim?

Yes, provided the dent produces a visible contour change larger than the optical system's minimum detectable feature. Large dents are easier to detect, while small local deviations require greater pixels-per-millimetre sampling. Qualification should therefore use dents close to the real reject threshold.

6. Is a 16 mm Machine Vision Lens suitable for complete can-end inspection?

It can be where the resulting FOV covers the full can end plus normal positional tolerance. For compatible 2/3" systems, Kyptec Automation® KL-1226 16 MM Machine Vision Lens With 10 MegaPixel & 2/3" Format Lens provides 16 mm focal length, 10 MP resolution, C-mount and an F2.8–16 aperture range. Final suitability should still be calculated from actual sensor size, working distance and can diameter.

7. When should a 25 mm Machine Vision Lens be considered for can inspection?

A 25 mm focal length can be useful when the required can-end field fits inside a tighter image and more pixels per millimetre are desirable. Kyptec Automation® KL-1228 25 MM Machine Vision Lens With 10 MegaPixel & 2/3" Format Lens provides 25 mm focal length, 10 MP resolution, C-mount and an F2.8–16 aperture range for compatible 2/3" systems.

8. Can one camera check rim geometry, lid position and pull-tab orientation together?

Yes, if all required features remain visible and the smallest relevant geometric tolerance receives sufficient optical sampling. The complete can end is particularly useful because the outer rim can establish a common coordinate system for lid and tab measurements. The lens should therefore be selected according to the most demanding feature among the combined inspections.

9. How can machine vision detect an oval or deformed can end?

The system can fit an expected circular or elliptical geometry to the visible rim and measure deviations from the acceptable shape. A globally deformed can end changes a substantial portion of the circumference, while a local dent affects only one region. The Machine Vision Lens should support whichever smaller deviation defines the reject threshold.

10. When should a 25 MP Machine Vision Lens be considered for can-end inspection?

A 25 MP configuration can be useful when a comparatively large field must remain visible while small rim or lid-position tolerances still require substantial image sampling. For compatible larger-format systems, Kyptec Automation® KL-1240 25 MM Machine Vision Lens With 25 MegaPixel & 1.1" Format Lens provides 25 mm focal length, 25 MP resolution, C-mount and an F2.8–22 aperture range.

11. Can several can ends be inspected in one camera image?

Yes, provided each can still receives enough sensor pixels for the smallest required defect or positional tolerance. Increasing the number of cans expands the physical FOV and reduces pixels per product, so multi-can inspection should be calculated from the complete field rather than testing one isolated can.

12. Can a 35 mm Machine Vision Lens be used when more camera stand-off is required?

It can when the sensor size and working distance produce the required can-end FOV. For compatible 2/3" systems, Kyptec Automation® KL-1230 35 MM Machine Vision Lens With 10 MegaPixel & 2/3" Format Lens provides 35 mm focal length, 10 MP resolution, C-mount and an F2.8–16 aperture range. This focal-length class can be useful where mechanical equipment limits how close the camera can be mounted.

13. Can a 50 mm Machine Vision Lens be used for detailed rim inspection?

Yes, where only one can or a localized can-end region must be inspected and sufficient working distance is available. Kyptec Automation® KL-1244 50 MM Machine Vision Lens With 25 MegaPixel & 1.1" Format Lens provides 50 mm focal length, 25 MP resolution, C-mount and an F2.8–22 aperture range for compatible larger-format systems. Tighter framing can place more sensor pixels on rim and lid geometry.

14. Why does a pull tab sometimes appear correctly positioned but fail orientation inspection?

Position and orientation are different measurements. The tab center can be close to the expected location while its longitudinal axis is rotated outside the permitted angle. A reliable inspection should therefore calculate both conditions separately relative to the can-end coordinate system.

15. Does can position on the conveyor affect rim measurements?

It can if the system depends on fixed image coordinates. A stronger approach detects each can's own rim geometry and establishes a product-centered reference before evaluating the lid, pull tab and defects. The Machine Vision Lens should maintain sufficient image quality across the complete valid conveyor-position range.

16. Can different can diameters use the same Machine Vision Lens?

They can if the largest can fits inside the required FOV and the smallest can still occupies enough sensor pixels for its tightest defect tolerance. Because a smaller can uses less of the image, its minimum rim defect can sometimes become the harder optical condition. Each can format should therefore be checked independently before one lens is standardized.

17. What information should I provide before buying a Machine Vision Lens for can-end inspection?

Provide can-end diameter, smallest rim or edge defect to detect, allowable lid-position tolerance, pull-tab orientation requirement, number of cans expected in one image, camera sensor format and resolution, available working distance and expected conveyor-position variation. These parameters allow a Kyptec Automation® Machine Vision Lens to be evaluated according to actual FOV, pixels per millimetre and minimum inspection tolerance rather than selecting optics by camera megapixels alone.

Design Can-End Inspection Around the Smallest Geometric Error, Not Only the Can Diameter

Reliable metal can and can-end inspection requires recognizing that can presence, rim shape, lid position, pull-tab orientation, dent detection and edge-defect inspection operate at different geometric scales. A complete can end can appear clear while a small damaged rim section remains under-resolved. Likewise, a lid can be present but displaced slightly from the can center, or a pull tab can occupy the expected general area while being rotated beyond the permitted angular range.

The strongest optical design begins with can diameter, required conveyor margin, smallest rim defect, allowable lid offset, pull-tab orientation tolerance and available working distance. The minimum legitimate FOV is then established and pixels per millimetre are calculated before selecting focal length and resolution. Final qualification should use can ends with defects and positional deviations close to the actual pass/fail boundaries rather than only severely damaged samples.

Kyptec Automation® provides a comprehensive Machine Vision Lens portfolio spanning several focal lengths and conventional 5 MP, 10 MP and 25 MP resolution classes for multiple industrial camera formats. Verified examples relevant to different can-inspection geometries include Kyptec Automation® KL-1226 16 MM Machine Vision Lens With 10 MegaPixel & 2/3" Format Lens for broader coverage, Kyptec Automation® KL-1228 25 MM Machine Vision Lens With 10 MegaPixel & 2/3" Format Lens for more controlled framing, Kyptec Automation® KL-1230 35 MM Machine Vision Lens With 10 MegaPixel & 2/3" Format Lens where additional stand-off may be useful, and Kyptec Automation® KL-1240 25 MM Machine Vision Lens With 25 MegaPixel & 1.1" Format Lens or Kyptec Automation® KL-1244 50 MM Machine Vision Lens With 25 MegaPixel & 1.1" Format Lens for compatible higher-resolution systems.

By matching the appropriate Kyptec Automation® Machine Vision Lens to can-end diameter, smallest rim or lid defect, sensor format, required working distance and inspection FOV, canning-machine OEMs and system integrators can establish a stronger optical foundation for automated rim-geometry inspection, lid-position verification, pull-tab orientation measurement, dent detection and visible can-end edge inspection.