A billboard which is formed as a dasher board (600) and adapted for use in a video content replacement system (400) is described. The dasher board (600) comprises at least one non-visible radiation source (604) arranged to emit non-visible radiation toward a light guide plate (602). The light guide plate (602) is arranged to distribute the non-visible radiation over the light guide plate (602) and radiate the non-visible radiation away from the dasher board (600). An area of the light guide plate (602) over which non-visible light is distributed from is correlated to an area of the dasher board (600) which is to be replaced in the video content replacement system (400). There is also described is a billboard (700) similarly adapted for use in a video content replacement system (400) and which comprises an electronic display, as well as a method of retrofitting an existing billboard (10) ready for use in a video content replacement system (400).
G06F 3/0484 - Techniques d’interaction fondées sur les interfaces utilisateur graphiques [GUI] pour la commande de fonctions ou d’opérations spécifiques, p. ex. sélection ou transformation d’un objet, d’une image ou d’un élément de texte affiché, détermination d’une valeur de paramètre ou sélection d’une plage de valeurs
G06F 3/04842 - Sélection des objets affichés ou des éléments de texte affichés
H04N 5/645 - Montage du tube d'image sur le châssis ou dans le boîtier
H04N 21/234 - Traitement de flux vidéo élémentaires, p. ex. raccordement de flux vidéo ou transformation de graphes de scènes du flux vidéo codé
H04N 21/2668 - Création d'un canal pour un groupe dédié d'utilisateurs finaux, p. ex. en insérant des publicités ciblées dans un flux vidéo en fonction des profils des utilisateurs finaux
H04N 21/414 - Plate-formes spécialisées de client, p. ex. récepteur au sein d'une voiture ou intégré dans un appareil mobile
F21V 8/00 - Utilisation de guides de lumière, p. ex. dispositifs à fibres optiques, dans les dispositifs ou systèmes d'éclairage
G09F 9/00 - Dispositifs d'affichage d'information variable, dans lesquels l'information est formée sur un support, par sélection ou combinaison d'éléments individuels
G09F 15/00 - Tableaux, panneaux, colonnes ou structures analogues pour des avis, des placards, des affiches ou des moyens d'information similaires
G09F 19/12 - Moyens de publicité ou de présentation non prévus ailleurs utilisant des effets optiques particuliers
2.
Method and apparatus for image content detection and image content replacement system
A subject, such as a billboard, has a filtering film to absorb electromagnetic radiation specifically in a first wavelength band. A detector provides a first detector signal relating to the first wavelength band and a second detector signal relating to another, different, second wavelength band, respectively. Suitably, the subject appears with high intensity in one band and with low intensity in the other. A content replacement unit produces a mask signal by identifying regions of contrast between the first and second detector signals as target areas. A content substitution unit selectively replaces the target areas with alternate image content to generate modified video images. The system is useful, for example, to generate multiple live television broadcasts each having differing billboard advertisements.
An original image layer is mixed with one or more graphics layers to form a composite video signal, such as in a vision mixer. Also, the same graphics layers are mixed identically into another, known background image layer to give a second composite video signal. The currently applied added graphics layers are determined, without directly accessing the added graphics layers themselves, using only the first and second composite video signals, the original image layer, and the known background image, such as in a graphics layer detection device. A triangulation matting algorithm may be used in one example.
A sample key signal frame (602) and/or a sample image frame (601) may be stored showing a finely detailed element (101) at a first resolution (e.g. a zoomed-in image). A current image signal (71) includes the same finely-detailed element (101) at a second, lower, resolution (e.g. a wide-angle image). The sample (601, 602) is scaled and/or transformed to match a target area (10,14) within the current image (71), and may be used to perform an image enhancement process which enhances the detailed element (101) within an enhanced modified image frame (74). Thus, a more photo-realistic image is achieved.
G09G 5/00 - Dispositions ou circuits de commande de l'affichage communs à l'affichage utilisant des tubes à rayons cathodiques et à l'affichage utilisant d'autres moyens de visualisation
H04N 5/272 - Moyens pour insérer une image de premier plan dans une image d'arrière plan, c.-à-d. incrustation, effet inverse
G09G 5/377 - Détails concernant le traitement de dessins graphiques pour mélanger ou superposer plusieurs dessins graphiques
G06T 11/60 - Édition de figures et de texteCombinaison de figures ou de texte
5.
Method and apparatus for image frame identification and video stream comparison
A method and apparatus 200 are provided for identifying image frames 10 in a video stream 20, and for comparing one video stream 20-1 against one or more other video streams 20-2. The or each video stream 20 is examined to produce a respective digest stream 320-1 comprising digest values 310-1, which may be recorded in a digest record 410. A candidate image frame 10-2 from a second video stream 20-2 provides a respective second digest value 310-2. A match of the digest values indicates matching images in the respective video streams.
H04N 21/44 - Traitement de flux élémentaires vidéo, p. ex. raccordement d'un clip vidéo récupéré d'un stockage local avec un flux vidéo en entrée ou rendu de scènes selon des graphes de scène du flux vidéo codé
G06K 9/00 - Méthodes ou dispositions pour la lecture ou la reconnaissance de caractères imprimés ou écrits ou pour la reconnaissance de formes, p.ex. d'empreintes digitales
H04N 21/84 - Génération ou traitement de données de description, p. ex. descripteurs de contenu
H04N 21/8549 - Création de résumés vidéo, p. ex. bande annonce
6.
METHOD AND APPARATUS FOR DYNAMIC IMAGE CONTENT MANIPULATION
A sample key signal frame (602) and/or a sample image frame (601) may be stored showing a finely detailed element (101) at a first resolution (e.g. a zoomed-in image). A current image signal (71) includes the same finely-detailed element (101) at a second, lower, resolution (e.g. a wide-angle image). The sample (601, 602) is scaled and/or transformed to match a target area (10,14) within the current image (71), and may be used to perform an image enhancement process which enhances the detailed element (101) within an enhanced modified image frame (74). Thus, a more photo-realistic image is achieved.
A method and apparatus 200 are provided for identifying image frames 10 in a video stream 20, and for comparing one video stream 20-1 against one or more other video streams 20-2. The or each video stream 20 is examined to produce a respective digest stream 320-1 comprising digest values 310-1, which may be recorded in a digest record 410. A candidate image frame 10-2 from a second video stream 20-2 provides a respective second digest value 310-2. A match of the digest values indicates matching images in the respective video streams.
H04N 21/44 - Traitement de flux élémentaires vidéo, p. ex. raccordement d'un clip vidéo récupéré d'un stockage local avec un flux vidéo en entrée ou rendu de scènes selon des graphes de scène du flux vidéo codé
H04N 21/8549 - Création de résumés vidéo, p. ex. bande annonce
H04N 21/84 - Génération ou traitement de données de description, p. ex. descripteurs de contenu
G06K 9/00 - Méthodes ou dispositions pour la lecture ou la reconnaissance de caractères imprimés ou écrits ou pour la reconnaissance de formes, p.ex. d'empreintes digitales
The invention allows detecting which graphics, if any, have been added to the video signal at any given time by utilizing only the various signals provided by prior art hardware. A first video signal, graphics signal(s), and a second video signal are received. It is then determined which graphics, if any, are present in a given frame of the received second video signal based on comparing actual values of pixels of the received second video signal and calculated values of pixels derived from the first video signal, and the graphics signal(s), and the combination of graphics signal(s) which produces the best match is searched for.
H04N 9/76 - Circuits pour le traitement de signaux de couleur pour obtenir des effets particuliers pour le mélange de signaux de couleur
G06K 9/00 - Méthodes ou dispositions pour la lecture ou la reconnaissance de caractères imprimés ou écrits ou pour la reconnaissance de formes, p.ex. d'empreintes digitales
H04N 5/445 - Circuits de réception pour visualisation d'information additionnelle
H04N 21/234 - Traitement de flux vidéo élémentaires, p. ex. raccordement de flux vidéo ou transformation de graphes de scènes du flux vidéo codé
H04N 21/44 - Traitement de flux élémentaires vidéo, p. ex. raccordement d'un clip vidéo récupéré d'un stockage local avec un flux vidéo en entrée ou rendu de scènes selon des graphes de scène du flux vidéo codé
b) as target areas (75). A content substitution unit (47) selectively replaces the target areas (75) with alternate image content (42) to generate modified video images (72). The system is useful, for example, to generate multiple live television broadcasts each having differing billboard advertisements.
For dynamic image content manipulation, a target area key signal KA defines a target area of a first program signal PGM1 which is to be modified. A difference key signal KD is generated as a combination of the target area key signal KA and a graphics key signal KG which defines coverage over a clean feed image signal CF by a graphics fill signal FG to give the first program signal PGM1. A difference fill signal FD is derived according to image differences between the first program signal PGM1 and the clean feed image signal CF. In one example, at least one modified program signal M-PGM is produced by combining the first program signal PGM1 with an alternate content fill signal FA according to the difference key signal KD and the difference fill signal FD.
The invention allows detecting which graphics, if any, have been added to the video signal at any given time by utilizing only the various signals provided by prior art hardware. A first video signal, graphics signal(s), and a second video signal are received. It is then determined which graphics, if any, are present in a given frame of the received second video signal based on comparing actual values of pixels of the received second video signal and calculated values of pixels derived from the first video signal, and the graphics signal(s), and the combination of graphics signal(s) which produces the best match is searched for.
H04N 17/00 - Diagnostic, test ou mesure, ou leurs détails, pour les systèmes de télévision
H04N 21/234 - Traitement de flux vidéo élémentaires, p. ex. raccordement de flux vidéo ou transformation de graphes de scènes du flux vidéo codé
G06K 9/00 - Méthodes ou dispositions pour la lecture ou la reconnaissance de caractères imprimés ou écrits ou pour la reconnaissance de formes, p.ex. d'empreintes digitales
H04N 21/44 - Traitement de flux élémentaires vidéo, p. ex. raccordement d'un clip vidéo récupéré d'un stockage local avec un flux vidéo en entrée ou rendu de scènes selon des graphes de scène du flux vidéo codé
12.
APPARATUS AND METHOD FOR IMAGE CONTENT REPLACEMENT
An image content replacement apparatus and method wherein a camera image receiving unit (44) receives video images (21) observing a scene including a subject(10) and a mask signal generating unit (46) generates a mask signal (43) that defines marked areas of the video images (21) corresponding to the subject (10). A content substitution unit (47) substitutes the marked areas with alternate image content (42) according to the mask signal (43) to output modified camera images (41). An image selector unit (48)selects the alternate image content (42) amongst at least a first alternate image content (42a) when the subject is determined to be in a first condition within the scene and a second alternate image content (42b) when the subject is determined to be in a second condition within the scene. In examples, the first and second alternate image contents (42a, 42b) are selected based on a determined camera zoom value or a camera angle.
A subject (10), such as a billboard, has a filtering film (15) to absorb electromagnetic radiation specifically in a first wavelength band. A detector (60) provides a first detector signal (61a) relating to the first wavelength band and a second detector signal (61b) relating to another, different, second wavelength band, respectively. Suitably, the subject (10) appears with high intensity in one band and with low intensity in the other. A content replacement unit (40) produces a mask signal (43) by identifying regions of contrast between the first and second detector signals (61a, 61b) as target areas (75). A content substitution unit (47) selectively replaces the target areas (75) with alternate image content (42) to generate modified video images (72). The system is useful, for example, to generate multiple live television broadcasts each having differing billboard advertisements.
The invention allows detecting which graphics, if any,have been added to the video signal at any given time by utilizing only the various signals provided by prior art hardware. A first video signal, graphics signal(s), and a second video signal are received. It is then determined which graphics, if any, are present in a given frame of the received second video signal based on com- paring actual values of pixels of the received second video signal and calculated values of pixels derived from the first video signal, and the graphics signal(s),and the combination of graphics signal(s)which produces the best match is searched for.
G06K 9/00 - Méthodes ou dispositions pour la lecture ou la reconnaissance de caractères imprimés ou écrits ou pour la reconnaissance de formes, p.ex. d'empreintes digitales
An arrangement for distributing radiation, the arrangement comprising a radiation source (1) and a plate-like distributor element (3), positioned in the passage of a radiation beam (2) produced by the radiation source, for distributing the radiation. According to the invention, the radiation beam (2) is oriented at a slight angle to the plane (4) of the distributor element, and the distributor element comprises a plate-like body portion (5) made from a transparent material and reflective surfaces (7) arranged stepwise one after the other and side by side on the body portion (5) in the direction of the radiation beam (2) and at an angle to the plane (4) of the distributor element for dividing the radiation beam into substantially mutually parallel sub-beams (8) in a direction that differs from the direction of the radiation beam.
In the method for providing an interactive television broadcast, an area of interest (9) in a television picture (8), corresponding to an object of interest (2) shown in the picture and intended to be associated with interactivity, is determined by means of a marking surface (6) arranged in a particular location relative to the object of interest and differing from the marking surface surroundings on the basis of the radiation from it, the marking surface being detected by a detector (7) sensitive to said radiation.
brevets
