Developer Reference

  • 2020
  • 07/15/2020
  • Public Content
Contents

Feature Detection Functions

This section describes feature detection functions.
The set of the Sobel derivative filters is generally used to find edges, ridges, and blobs, especially in case of scale-space images, for example, pyramids.
The following naming conventions are used in the equations described below:
  • D
    x
    and
    D
    y
    are the first
    x
    and
    y
    derivatives, respectively.
  • D
    xx
    are
    D
    yy
    are the second
    x
    and
    y
    derivatives, respectively.
  • D
    xy
    is the partial
    x
    and
    y
    derivative.
  • D
    xxx
    and
    D
    yyy
    are the third
    x
    and
    y
    derivatives, respectively.
  • D
    xxy
    and
    D
    xyy
    are the third partial
    x
    and
    y
    derivatives.

Product and Performance Information

1

Intel's compilers may or may not optimize to the same degree for non-Intel microprocessors for optimizations that are not unique to Intel microprocessors. These optimizations include SSE2, SSE3, and SSSE3 instruction sets and other optimizations. Intel does not guarantee the availability, functionality, or effectiveness of any optimization on microprocessors not manufactured by Intel. Microprocessor-dependent optimizations in this product are intended for use with Intel microprocessors. Certain optimizations not specific to Intel microarchitecture are reserved for Intel microprocessors. Please refer to the applicable product User and Reference Guides for more information regarding the specific instruction sets covered by this notice.

Notice revision #20110804