by JE Greivenkamp · 2004 · Cited by 614 — Vignetting · While the stop alone defines the axial ray bundle, vignetting occurs when other apertures in the system, such as a lens clear aperture, block all ...

Line pair per mmconverter

Ribbed linear diffusion glass used to spread light horizontally or vertically · Ideal for diffusing and elongating a beam of light to structures such as columns ...

SincereFirst is a high-tech enterprise integrating professional R&D, production and sales of overall solutions for machine vision camera modules.

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lp/mm calculator

Resolition is measured using edges, Siemens stars or other regular structures with aíncreasing frequencies. Units like LW/PH, LP/PH, or Cycles per pixel are independent of the sensor size and the pixel pitch. They just take the resulting image and its frequency content into account not caring about the size of each pixel. Dimensions like LP/mm, L/mm, or Cycles/mm require the knowledge about the sensor size / pixel pitch.The following table and explanation will be part of the upcoming revision of ISO 12233 and was created by Don Williams.

One very important parameter for testing a digital imaging device is the resolution*. But there are different ways to express the resolution of a digital camera which are sometimes confusing. Here are the most common units.

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Line pair per mmcalculator

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*There are several methods to measure the MTF and/or the SFR and all of these methods have their own advantages and disadvantages. See conference paper »

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Wie groß du ein Bild drucken kannst, hängt vor allem von der Zahl der Bild-Pixel quer mal hoch ab. Hat man zu wenig Bildpunkte für die geplante Druckgröße, dann ...

NOTE 1The pixel pitch in the 45 degree diagonal direction is not the same as in the vertical and horizontal directions. Therefore, the diagonal pixel pitch is used when applying this table to measurements in the diagonal directionsNOTE 2There are three planes for determination of the resolution in e.g. LP/mm. It can be in the object space, on the sensor plane or in the image with a given output magnification. In most cases the resolution on the sensor plane is the important one. To get the right value for this situation the image file should be scaled to the Sensor dimension in which case the pixel pitch on the sensor is equal to the pitch of pixels in the image file.

LW/PH = Line width per picture heightLP/mm = Line pairs per millimetreL/mm = Lines per millimetreCycles/mm = Cycles per millimetreCycles/pixel = Cycles per pixelLP/PH = Linepairs per picture height

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SincereFirst is a high-tech enterprise integrating professional R&D, production and sales of overall solutions for machine vision camera modules.