downsampling
subsampling

In addition, some downsampling is always performed, again reducing image information.

Downsampling allows Distiller to bring down the resolution of pictures in the file.

Similar horizontal downsampling is used in many other HD formats.

However computing a complete convolution with subsequent downsampling would waste computation time.

Some amount of spatial and temporal downsampling may also be used to reduce the raw data rate before the basic encoding process.

However, due to the downsampling process the overall number of coefficients is still the same and there is no redundancy.

Downsampling will then yield transparency.

Proof Printing Support: downsampling of hi-resolution originals for output to a lower resolution proofing device.

Under "Greyscale Images" select "Bicubic downsampling to" and set the dpi to 304.

Note that downsampling is not applicable to greyscale data; this is one reason color images are more compressible than greyscale.

Upsampling requires a lowpass filter after increasing the data rate, and downsampling requires a lowpass filter before decimation.

Due to the downsampling of the signal, the length of the signal in each subband is reduced thus reducing the length of the adaptive filter required.

The control for sample rate reduction (a.k.a. "downsampling" or "averaging") is sometimes shown in Hz for a new sample rate, or as a reduction factor.

Downsampling reduces the spatial (horizontal and/or vertical) resolution of the TV-program, reducing the TV-signal's pixel-rate, and therefore its bandwidth requirements.

Downsampling of pictures is another option in distiller, it can be used to reduce the images resolution if this would otherwise be too high, i.e. more than two times the line screen.

Discrete Fourier transform signal processing including the FFT, frequency response estimation, interpolation. downsampling, convolution, block convolution, correlation, cepstrum.

Using the DSP with high-resolution audiostreams resulted in the Audigy's characteristic downsampling (to the DSP's native-rate of 48 kHz), for mixing with other audio sources.

Downsampling reduces the resolution of an image to the specified dpi setting by averaging the pixel color of a sample area and replacing that area with a pixel of the averaged color.

The most common choice is a FIR filter for low amounts of decimation (less than ten) or a CIC filter followed by a FIR filter for larger downsampling ratios.

The subsampling in a video system is usually expressed as a three part ratio.

Point-level subsampling is often employed in forest inventory for efficiency.

Subsampling of specific stream sections provided a good index of abundance.

Firstly, chroma subsampling reduces the size of the images by approximately 50%.

Even so, involuntary deaths by lethal injection represent a narrow subsampling of the total death toll.

Chroma subsampling causes problems for film makers trying to do keying with blue or green screening.

This subsampling is by a factor of 4 for 4Base images, and a factor of 2 for all other resolutions.

The chroma can influence the luma specifically at the pixels where the subsampling put no chroma.

Today, only high-end equipment processing uncompressed signals uses a chroma subsampling of 4:4:4 with identical resolution for both brightness and color information.

With interlaced material, 4:2:0 chroma subsampling can result in motion artifacts if it is implemented the same way as for progressive material.

The approach seen in attempts to further simplify the pre-distorter feedback system by applying subsampling in order to eliminate a down conversion stage.

Suppose the image consisted of alternating 1-pixel red and black lines and the subsampling omitted the chroma for the black pixels.

The disadvantage of this approach is the restriction of the carrier location and spacing that is inherent to achieving proper subsampling.

Prior to the DCT compression stage, chroma subsampling is applied to the source video in order to reduce the amount of data to be compressed.

Michael Wolf also co-wrote the book on Subsampling, a resampling method inspired by the jackknife that constitutes an alternative to the bootstrap.

'Chroma subsampling' is the practice of encoding images by implementing less resolution for Chrominance information than for luma (video) information.

Chroma subsampling approximates this by converting R'G'B' values into Y'CbCr color space.

Initially, 4:1:1 chroma subsampling of the DV format was not considered to be broadcast quality and was only acceptable for low-end and consumer applications.

One of the artifacts that can occur with chroma subsampling is that out-of-gamut colors can occur upon chroma reconstruction.

'Chroma subsampling': Since human vision has greater acuity for luminance than color, performance can be optimized by devoting greater bandwidth to luminance than color.

HTM) or in details in Chrominance Subsampling in Digital Images, by Douglas Kerr.

Subsampling allows one to define an out-of-bag estimate of the prediction performance improvement by evaluating predictions on those observations which were not used in the building of the next base learner.

Multiple Nyquist subsampling was used by the defunct MUSE HDTV system that was used in Japan.

It is important to send pictures Normal and not to use optimised subsampling, otherwise Pagemaker will try to reduce the resolution of scans to suit your printer and this can result in great loss of detail.

This is because wavelet compression operates by repeatedly using wavelets as high and low pass filters to separate frequency bands in an image, and the wavelets do a better job than chroma subsampling does.