A method of averaging surrounding pixels to add to the number of pixels in a digital image. Sometimes used to increase resolution of an image in an image-editing program to make a larger print from the image.
A process of assigning values to new, rectified, or rescaled (re-sized) cells in a raster database.
Removing some proportion of the pixels in an image (for example, every other pixel) to reduce the size.
Extrapolating pixels values for a new grid from values in an old grid. It is applied after an image is rectified to a projection system or registered to another image.
Changing the resolution of an image by increasing or decreasing the number of pixels.
The process of transforming a sampled image from one coordinate system to another. The two coordinate systems are related by the mapping function of the transformation. Using the inverse of the transformation, the regular grid corresponding to the pixel locations in the output image is mapped onto the input image. The input image is then sampled at each of these points, and the sampled values are assigned to their respective output locations in the output image. Compare with Reconstruction.
The process of changing the resolution or size of an image to alter the number of pixels it contains. Up sampling increases the resolution, increasing the number of pixels; down sampling reduces the resolution, decreasing the number of pixels in an image.
Adding (upsampling) or deleting (downsampling) pixels.
Modifying the geometry of an image (which may be from either a remotely sensed or map data source). This process usually involve rectification and/or registration.
resampling occurs in two forms: down sampling and up sampling. Scanning often occurs at a higher resolution than is necessary and the required resolution is obtained by resampling the image. Aliasing can occur when the image data are downsized. To minimise its effects low-pass filtering can be applied to the image before it is downsized. Up sampling should be avoided because no additional image information can be created.
A process that reduces an image's resolution while maintaining the image's height and width. To resample, the program subtracts or blends pixels. When you are preparing images for the Web, resampling can shrink file sizes so that visitors to a site can download the images faster.
The process of converting between different spatial resolutions or different temporal resolutions. This may be based on simple sampling of the source information at higher or lower resolution or may include interpolation to correct for differences in pixel aspect ratios or to adjust for differences in display rates.
An increase or reduction in the number of pixels in an image, required to change its resolution without altering its size.
the process of extrapolating data file values for the pixels in a new grid, when data have been rectified or registered to another image.
Converting from one resolution to another, whether spatial or temporal resolutions.
Rearrangement of image data in the transformed coordinate system into geo-coded image, using coordinate transformation and interpolation. Resampling is essentially used in the geometric correction of remote sensing data.
Changing the resolution of a bitmap file without altering its physical size.
The process of reducing image data set size by representing a group of pixels with a single pixel. Thus, pixel count is lowered, individual pixel size is increased, and overall image geographic extent is retained. Resampled images are "coarse" and have less information than the images from which they are taken. Conversely, this process can also be executed in the reverse. In ArcInfo, the GRID function RESAMPLE supports resampling of raster data using Cubic Convolution, Bilinear Interpolation, Nearest Neighbor Assignment, and custom "Nearest Data" assignment methods.
Process of reducing the amount of colour information/size of a scanned image or illustration.
Resampling is the digital process of changing the sample rate or dimensions of digital imagery or audio by temporally or areally analysing and sampling the original data. For the statistical use, please see Resampling (statistics).
