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Shape in .NET Integrating bar code 39 in .NET Shape




How to generate, print barcode using .NET, Java sdk library control with example project source code free download:
Shape using barcode printing for vs .net control to generate, create code 39 image in vs .net applications. Microsoft Visual Studio Table 9.1. Invariant moments. 1 2 3 4 5. = 20 02 .NET Code 39 Extended 2 = ( 20 02 )2 + 4 11 = ( 30 3 12 )2 + (3 21 03 )2 = ( 30 + 12 )2 + ( 03 + 21 )2 = ( 30 3 12 )( 30 + 12 )[( 30 + 12 )2 3( (3 21 03 )( 03 + 21 )[3( 30 + 12 )2 ( = ( 20 02 )[( 30 + 12 )2 ( 03 + 21 )2 ]+ 4 11 ( 30 + 12 )( 21 + 03 ) = (3 21 03 )( 30 + 12 )[( 30 + 12 )2 3( (3 12 03 )( 21 + 03 )[3( 30 + 12 )2 (. + 03 + 2 21 ) ]+ 2 21 ) ]. + 03 + 2 21 ) ]+ 2 21 ) ]. Since thei r original development by Hu [9.33], the concept has been extended to moments which are invariant to af ne transforms by Rothe et al. [9.

62]. Despite their attractiveness, strategies based on moments do have problems, not the least of which is sensitivity to quantization and sampling [9.45].

(See Assignment 9.9.) The use of moments is actually a special case of a much more general approach to image matching [9.

89] referred to as the method of normalization. In this philosophy, we rst transform the region into a canonical frame by performing a (typically linear) transform on all the points. The simplest such transformation is to subtract the coordinates of the center of gravity (CG) from all the pixels, thus moving the coordinate origin to the CG of the region.

In the more general case, such a transformation might be a general af ne transform, including translation, rotation, and shear. We then do matching in the transform domain, where all objects of the same class (e.g.

, triangles) look the same. Some re nements are also required if moments are to be calculated with grayscale images, that is, when the f of Eq. (9.

37) is not the result of a thresholding operation. All the theory of invariance still holds, but as Gruber and Hsu [9.24] point out, noise corrupts moment features in a data-dependent way.

Once a program has extracted a set of features, some use must be made of this set, either to match two observations or to match an observation to a model. The use of simple features in matching is described in section 13.2.

. 9.5 Chain codes A chain co de is a feature describing the boundary of a region. In a chain code, we represent a counter-clockwise walk around a region by a sequence of numbers,. 9.6 Fourier descriptors 2 3 4 5 6 7 1 0 2. Fig. 9.11.

Code 39 for .NET The eight directions (for 8-neighbor) and four directions (for 4-neighbor) in which one might step in going from one pixel to another around a boundary..

Fig. 9.12.

The boundary segment represented by the chain code 02 1212 272 63 0. Can you determine what if anything is wrong with the caption on this gure . all betwee 3 of 9 for .NET n 0 and 7 (if using eight directions) or between 0 and 3 (if using four directions), designating the direction of each step. The eight and four cardinal directions are de ned as illustrated in Fig.

9.11. The boundary of a region may then be represented by a string of single digits.

A more compact representation utilizes superscripts whenever a direction is repeated. For example, 0012112776660 could be written 02 1212 272 63 0, and illustrates the boundary shown in Fig. 9.

12. The ability to describe boundaries with a sequence of symbols plays a signi cant role in the discipline known as syntactic pattern recognition, and appears frequently in the machine vision literature, including other places in this book..

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