What is subpixel mapping?

Subpixel mapping technology can determine the specific location of different objects in the mixed pixel and effectively solve the uncertainty of the ground features spatial distribution in traditional classification technology.

What is subpixel classification?

Subpixel classification (SPC) extracts meaningful information on land-cover classes from the mixed pixels. However, the major challenges for SPC are to obtain reliable soft reference data (RD), use apt input data, and achieve maximum accuracy.

What is subpixel convolution?

Sub-pixel convolution [1,14] is a specific implementation of a deconvolution layer that can be interpreted as a standard convolution in low-resolution space followed by a periodic shuffling operation as shown in Figure 2.

What is mixed pixel?

mixed pixel In remote sensing terminology, a pixel that has a digital number which represents the average energy emitted or reflected from several different surfaces occurring within that area represented by the pixel. A Dictionary of Earth Sciences. “mixed pixel .”

How does pixel shuffle work?

PixelShuffle is an operation used in super-resolution models to implement efficient sub-pixel convolutions with a stride of . Specifically it rearranges elements in a tensor of shape ( ∗ , C × r 2 , H , W ) to a tensor of shape ( ∗ , C , H × r , W × r ) .

What is checkerboard artifact?

In research fields of image-to-image translation prob- lems, e.g., image super-resolution, checkerboard artifacts are known to be caused by forward-propagation of upsam- pling layers including transposed convolutional layers and by backward-propagation of downsampling layers including strided convolutional layers [17].

Where are mixed pixels a problem?

mixed pixel problem occurs when, at the scale of observation, there are a number of classes contributing to the observed spectral response of the pixel. This is illustrated in Fig. … the case of a pixel comprising a mixture of two classes.

What is the mixed pixel problem in GIS?

A “mixed pixel” results from the fact that individual areas consisting of different features or classes may be below (are smaller than) the resolution of the sensor.

What is a deconvolution layer?

A deconvolution is a mathematical operation that reverses the effect of convolution. Imagine throwing an input through a convolutional layer, and collecting the output. Now throw the output through the deconvolutional layer, and you get back the exact same input.

What is checkerboard effect?

The visual effect of oscillating colors or weaves to produce a grid in the appearance of a chess or checkerboard.

What are mixed pixels?

Mixed pixels are pixels containing more than one distinct material called endmembers. The presence percentages of endmembers in mixed pixels are called abundance fractions. Spectral unmixing problem refers to decomposing these pixels into a set of endm…