Modulation Transfer Function. Describes the modulation of an image as the frequency increases; ratio of modulation between image and object. Also called sine wave response.
Modulation Transfer Function. The way people (who else, the magazines!) uses to measure a lens's ability to hold diminishing details of a subject. Why MTF ? Because, everything is done electronically and eliminating any errors in human judgement or vision and results can be repeatable to counter check earlier tests. Secondly, a precise comprehensive rating is made possible by incorporating huge amount of data into a single reading, lastly it is very fast and permit its use on just out from production lenses.
modulation transfer function. The modulation transfer function of an imaging system measures the spatial frequency modulation response of the system. As an imaging system processes or records an image, the contrast modulation of the processed or recorded image is different from the input image. The MTF can be thought of as a curve, indicating for each spatial frequency the ratio of the contrast modulation of the output image to the contrast modulation of the input image. It is formally defined as the magnitude of the Fourier transform of the line spread function of the imaging system.
The frequency response of an optical system. Also a test that measures the optical frequency response of a scanner or other optical system. See also transfer function.
odulation ransfer unction - Spacing of high frequency lines before merging occurs, useful in judging lense quality and resolution.
Modulation transfer function. The ratio of the image amplitude to the object amplitude as a function of sinusoidal frequency variation in the object.
Modulation Transfer Function. A description of the ability of imaging equipment to reproduce spatial detail in an object. See this presentation for more details: Link
Modulation transfer function. The ratio of the modulation in the image to the modulation in the object as a function of spatial frequency.
Modulation Transfer Function. The ability of a lens or optical system to reproduce (transfer) various levels of detail (modulation) of an object to the image as the frequency (usually sinusoidal) increases.
Modulation Transfer Function. Measuring unit (%) for the resolution of an image transmitted by an optical system.
Modulation Transfer Function. A measure of contrast, or visibility, with respect to spatial frequency. As a function of maximum and minimum intensity visible in the image, MTF continuously declines with increasing spatial frequency to zero contrast at a theoretical maximum frequency defined by the diffraction limit of the optical system.
See Modulation Transfer Function.
Modulation Transfer Function. Basically the comparison between a graph with a set of lines, gradually increasing in width and spacing, and the reproduced image made with the lens tested for performance. One of standard tests made by lens manufacturers.