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- The slanted-edge method of measuring the spatial frequency response (SFR) as an approximation of the modulation transfer function (MTF) has become a well known and widely used image quality testing method over the last 10 years. This method has been adopted by multiple international standards including ISO and IEEE.
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Jan 2, 2023 · Relationship between PSF, LSF, ESF and MTF. The production of point light sources and line light sources requires a certain precision and is relatively complex, so the method of obtaining ESF by edge imaging is generally used to calculate MTF, which is called slanted-edge method.
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In this paper, MTF detection by slanted-edge method has been...
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- Reverse Projection Testing
- Modulation Transfer Function (Mtf) Testing
- Slanted-Edge MTF Testing
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In reverse projection testing, a lens test projector is used. The pattern from a high accuracy test target is placed at the image plane and is projected through an imaging lens to a specific WD (essentially, imaging in reverse) and observed in a dark room. Because the modulation of light through a lens is a reversible process, this method is a simp...
The most comprehensive representation of the resolution performance of an imaging lens is a MTF curve. MTF curves are used to directly compare the resolution of one lens to another. Commercial test benches are available that allow for the characterization of lenses within a three-dimensional coordinate system (Figure 2). An operator conducts an MTF...
Slanted-edge MTF testing obtains the same system level information as MTF testing but more quickly, with more adaptability, and on less expensive equipment. Where regular MTF testing uses the Airy disk of a point source, magnified by an objective to fit the full sensor to remove any external MTF contributions, slanted-edge MTF testing uses a high c...
"Camera test" is an umbrella term for all tests that use a camera. The slanted-edge MTF test is one specific camera test but it is not the only common camera test for resolution. Camera test methods can be adapted, using different techniques or equipment, to any real-word application to obtain system-level, environmentally relevant resolution infor...
The plugin performs system MTF calculations up to twice the Nyquist frequency over slanted vertical edge images with dark side at left; if the picture is taken from a horizontal slanted edge, the image must be rotated 90 degrees before running the plugin. At the same time, the plugin run the calculations and shows as a result four plots labeled ...
May 5, 2023 · Features. Determine Modular Transfer Function (MTF) of an Imaging System. 5° Slanted, L-Shaped Pattern (ISO 12233 Compatible) 20 Variable Ronchi Rulings, 10 lp/mm to 200 lp/mm. Thorlabs' Slant Edge MTF Target allows the user to determine the spatial frequency response of an imaging system via a slant edge pattern or Ronchi rulings.
The slanted-edge method of measuring the spatial frequency response (SFR) as an approximation of the mod-ulation transfer function (MTF) has become a well known and widely used image quality testing method over the last 10 years. This method has been adopted by multiple international standards including ISO and IEEE.
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The Slanted-Edge methodology is an astute way of doing this. It uses a tilted knife-edge image and assumes that the transition between the two zones is straight and sharp in the object space. Under these assumptions it is then possible to estimate the sub-pixel position of the edge.
Sharpness is most visible on features like image edges (Figure 2) and can be measured by the edge (step) response. Several methods are used for measuring sharpness that include the 10-90% rise distance technique, modulation transfer function (MTF), special and frequency domains, and slanted-edge algorithm.
