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Accuracy of sampling images near the Nyquist limit
- https://www.photrio.com/forum/threads/accuracy-of-sampling-images-near-the-nyquist-limit.168009/#:~:text=The%20Nyquist%20limit%20is%20twice%20the%20frequency%20of,misunderstand%20the%20implications%20of%20the%20Nyquist%20sampling%20theorem.
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Nyquist Frequency | Gatan, Inc.
- https://www.gatan.com/nyquist-frequency
- This frequency is known as the Nyquist frequency and is shown in the figures below. The theory intentionally excludes image components at the Nyquist frequency since at this frequency the detailed alignment of the image component with the pixel becomes critical. Sinusoidal signal at Nyquist “F/2” before sampling into pixels.
Nyquist Frequency - an overview | ScienceDirect Topics
- https://www.sciencedirect.com/topics/earth-and-planetary-sciences/nyquist-frequency
- Their low cut frequency is approximately 3–4 Hz, while high-frequency cut-off is generally 80% of the Nyquist frequency. In conventional seismic surveys, 4–200 Hz (18–300 dB/Oct) cut-off values are typical, whereas a wider pass-band is designed for high resolution acquisition, such as 5–412 Hz (12–300 dB/Oct).
Nyquist frequency, Aliasing, and Color Moire | Imatest
- https://www.imatest.com/docs/nyquist-aliasing/
- By definition the Nyquist frequency is 1 cycle in 2 pixels = 0.5 cycles/pixel. The signal (top row; 3 cycles in 4 pixels) is 3/2 the Nyquist frequency, but the sensor response (bottom row) is half the Nyquist frequency (1 cycle in 4 pixels)— the wrong frequency. It is aliased. Image sensors respond to signals above Nyquist— MTF is nonzero,
lens - What is the Nyquist Limit and what is its …
- https://photo.stackexchange.com/questions/10755/what-is-the-nyquist-limit-and-what-is-its-significance-to-photographers
- The Nyquist Limit is mostly used in digital sound recording, but it also applies to digital photography. In digital sound recording, the highest frequency sound that you can possibly record is half of the sampling frequency. A sound recording av 44100 kHz can not record any sound frequencies above 22050 Hz.
The Nyquist frequency - SEG Wiki
- https://wiki.seg.org/wiki/The_Nyquist_frequency
- is called the Nyquist range, which is of total length /.As we have seen, any actual rotation always appears as an apparent rotation within the Nyquist range. For example, the actual angular frequency = / is already in the Nyquist range, so in this case, the apparent angular frequency is the same as the actual angular frequency. Because the cyclic frequency f is /, the …
What is "Nyquist Frequency"? - inSync
- https://www.sweetwater.com/insync/nyquist-frequency/
- For example, when a digital recording uses a sampling rate of 44.1kHz, the Nyquist frequency is 22.050kHz. If a signal being sampled contains frequency components that are above the Nyquist limit, aliasing will be introduced in the digital representation of the signal unless those frequencies are filtered out prior to digital encoding.
Nyquist Frequency - an overview | ScienceDirect Topics
- https://www.sciencedirect.com/topics/mathematics/nyquist-frequency
- However, features at lower spatial frequencies are important. For this field, given the radiation sensitivity of typical samples, it is vitally important to maximize the DQE. For commercially available integrating direct detectors, the DQE at half the Nyquist frequency is in the range 40–60% but typically drops to 25% at the Nyquist frequency. For these applications, counting …
Digital Audio Chapter Five: Nyquist Frequency
- https://cmtext.indiana.edu/digital_audio/chapter5_nyquist.php
- This frequency, half the sampling rate, is often called the Nyquist frequency. A hypothetical system sampling a waveform at 20,000 samples per second cannot reproduce frequencies above 10,000 Hz. It is important to note that this means all component frequencies, including higher partials of lower tones.
CFA sensors and their Nyquist frequencies | Open Photography …
- https://openphotographyforums.com/forums/threads/cfa-sensors-and-their-nyquist-frequencies.18280/
- In the left-hand panel we see that for the R layer, for horizontal or vertical detail, the Nyquist frequency is half that of the monochrome sensor. In the right-hand panel we see the situation for diagonal detail. We see that here the applicable Nyquist frequency, FN', is 0.707 the Nyquist frequency for the monochrome sensor (FN).
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