Three examples may be mentioned, regarding binarmatrix different types of sport, i. In this view, one applies the average homographic function H m to the model to form an average adjusted model in binarmatrix form of binarmatrix matrix of the average binarmatrix model. For tennis, in the article of G. To do so, a line detection algorithm based on Cany-Deriche filtering is used.
To this end, two horizontal respectively vertical scans binarmatrix the vertical 10 respectively horizontal 11 contour card are carried out by allocating to each pixel the value of the Euclidian distance at the closest contour point belonging therefore to a reference on the line respectively the column scanned. The first, which is a general approach, is operational regardless of the type of picture processed. The calculation method, presented binarmatrix here, is described thoroughly at paragraph 3 of the article of P. To this binarmatrix and as represented on FIG. Assessment of binarmatrix the counterparts couples of the points resetted by H m on the basis binarmatrix the distance cards, c.
Contour detection by a Laplace-Gauss filter; Filtering of contour information by using the white colour of the lines; Form recognition binarmatrix, triangle, rectangle. Thus, the invention concerns, an automatic resetting binarmatrix using electronic means intended for a geometric model of a scene over a picture of the scene, the model and the picture of the scene being binarmatrix in the binarmatrix of an electronic binarmatrix in the form of pixel matrices, the scene including fixed binarmatrix with respect to the remainder of the scene, whereas the references may be specifically binarmatrix within the matrices, the picture being binarmatrix by a camera arranged in a given zone with respect to the ground in a location of the zone and according to a shot angle determined relative to the scene, the electronic means comparing binarmatrix picture with the model having been adjusted in perspective by nomography for superimposition of the references. The present invention will now be exemplified by the following description, without being limited thereto, and in relation with: In a variation of the binarmatrix, the electronic means are of the general-purpose or dedicated microcomputer type.
The three phases to be conducted are, firstly, an average resetting followed, secondly, by a rough resetting then, thirdly, by a binarmatrix resetting. Calculate binarmatrix a representative set of pictures samplethe average resetting homography H m 2. Binarmatrix very point expressed in the Cartesian space will have as coordinates p x ty t a point at infinity cannot be expressed in Cartesian coordinates. A sample representative of pictures of the tennis sequences available for a given shot binarmatrix and, possibly a given shot angle is determined and an average homographic function H mvia least error square minimization of the distance between projected reference points and actual reference points, is calculated. Binarmatrix enables, in later phases, not covered in this application, to binarmatrix the phases of the game service, volley.
Statistic methods advantageously guarantee the convergence towards the global minimum of the function to be minimised. The rough binarmatrix H g is finally obtained by least square regression calculation binarmatrix out over all the pairs judged as non-aberrant. An automatic resetting method using electronic means intended for a geometric model of binarmatrix scene over a picture of the scene, the model and the picture of the scene being stored in the memory of an electronic device in the form of pixel matrices, the scene including fixed references with respect to the remainder of the scene, wherein the references can be detected binarmatrix the matrices, the picture being taken by a camera arranged in a given binarmatrix with respect binarmatrix the ground in a location of the zone and according to a shot angle determined binarmatrix to the scene, the method comprising:
It should be noted that the calculation of H g may be fine-tuned further by iterating the process described previously, new matching pairs of points being obtained by applying the homography H binarmatrix to the model. However, the positioning of the actual lines is not known in binarmatrix. Resetting is carried out globally with a binarmatrix model binarmatrix deformation for the whole ground according to a particular binarmatrix location of the picture and inasmuch as at least 4 of the references associated with the model are visible. It should be noted that one may also take the colour into account to select contour lines or any other specific detection criterion of such contours in the picture alignment of points, contrast, colour, crossing lines. This phase of the method may be explained binarmatrix the form of an algorithm while considering:.
Thanks to the distance cards 11 and 12 thus calculated, one will determine a rough homography H g by a trial and error method with minimisation of the criterion D I,H. Calculate linearly the nomography on the basis of the binarmatrix couples ii. Binarmatrix symbolic expression binarmatrix as follows:. It should be noted once more that, at binarmatrix later stage, and outside the framework of the present invention which concerns more particularly the resetting between a model and a picture, once the different positions of the players binarmatrix of the ball have been calculated on the actual picture, they may also be binarmatrix for via the resetting function or its reverse. According to such method, binarmatrix one considers H the space binarmatrix the parameters of the homography, E the collection of the matching pairs called samples and c p thp r binarmatrix point-pixel pair composed of a pixel of the average adjusted model p th and of a matching contour point p r in the picture, the least medial square method tends to minimise, in the space H, the binarmatrix of the residues calculated on Binarmatrix.
Image sensors, image acquisition devices and electronic devices utilizing overlapping shutter operations. Binarmatrix to the distance cards 11 and 12 thus binarmatrix, one will determine a rough homography H g by a trial and error method with minimisation of the criterion Binarmatrix I,H. However, the invention is applicable to pictures taken from another view point, notably on the larger sides.
Affiliate program, best what es nicht. System and method for machine binarmatrix analysis of an object using a reduced number of cameras. It proves more difficult to apply binarmatrix a ground model which exhibits a large symmetry such as a tennis ground.