Abstract:
A triggering system and process for a form reader is shown using a histogram of the optical scene. The form reader is open on three sides with a camera facing a platen on to which a form is placed. The camera converts the light rays reflected from the platen into a video stream that is sent to a processor. A change in content of a first light intensity level contrasted to the content of a second light intensity level is used to determine when the form enters the scene. Illustratively, the first light intensity level represents black levels and the second light intensity levels represent white levels. A threshold is pre-determined that isolates the first light intensity content, and when the first light intensity content remains constant (after the presence of a form) the form is deemed to be still wherein the system may then read the information on the form.
Abstract:
The present invention relates in general to optical scanning and image processing, and relates more particularly to a document imaging system which detects skew and/or detects size/shape of a document image. Preferred embodiments utilize a background with optical characteristics which contrast with those of the scanned document. In one embodiment, a document imaging system generates scanning signals in response to optical characteristics of a medium such as a sheet of paper, detects transitions in the scanning signal which define points along one or more edges of the medium, establishes a skew angle between the detected edges and a reference orientation, and compensates for skew by modifying the scanning signals as required such that the resultant skew angle is substantially equal to zero. In another embodiment, a document imaging system detects one or more edges of a document, defines a polygon having sides substantially congruent with the detected edges, and establishes the size of the document in response to the polygon.
Abstract:
An optical scanning system (10) for scanning images from film transparencies or reflective copy, and for reproducing images onto film or photosensitive paper to prepare films, printing plates and the like. A platen assembly (16) having two platens (34, 36), each platen having an image area, is rotatable between two positions to selectively locate one of the platens in an orientation for scanning an image area of such platen. A scanner (44, 46) traces scan lines (60) across the image area in a first direction (y) as a gantry assembly (18) transports the scanner over the image area in a second direction (x). To load film, the scanner is automatically moved out of the platen's path of rotation, a sheet of film is automatically raised to the platen which by vacuum force holds the film to the platen, and the platen is rotated to bring the film into a position to be scanned.
Abstract:
An imaging device is disclosed. The imaging device includes a scanning unit to scan an interface area of the imaging device; a notifying unit to notify an operator of information indicating a presence or absence of an object on the interface area; and a controller, coupled to the scanning unit and the notifying unit, to control the scanning unit to scan the interface area after a completion of an operation task with respect to the object on the interface area, determine, for each scanned block in the interface area, whether a total number of consecutive non-white areas within the scanned block has reached a predetermined value, mark the scanned block as a target block if the predetermined value is reached, determine whether a number of the target blocks has reached a predetermined threshold, and control the notifying unit to notify the operator of information indicative of the object remaining on the interface area if the predetermined threshold is reached.
Abstract:
A triggering system and process for a form reader is shown using a histogram of the optical scene. The form reader is open on three sides with a camera facing a platen on to which a form is placed. The camera converts the light rays reflected from the platen into a video stream that is sent to a processor. A change in content of a first light intensity level contrasted to the content of a second light intensity level is used to determine when the form enters the scene. Illustratively, the first light intensity level represents black levels and the second light intensity levels represent white levels. A threshold is pre-determined that isolates the first light intensity content, and when the first light intensity content remains constant (after the presence of a form) the form is deemed to be still wherein the system may then read the information on the form.
Abstract:
An image forming apparatus includes a user interface unit that includes a scan area, an image reading unit that reads an image of a scan object disposed on the scan area, a driving unit that moves the image reading unit, a control unit that controls a function according to a position of the scan object, an operation performing unit that performs the function by using the read image, and a storage unit that stores information about the function corresponding to the position of the scan object. The scan area includes a determination area and a function area, and when it is determined that the scan object does not exist on the determination area, the control unit controls the operation performing unit to perform the function corresponding to the position of the scan object on the function area.
Abstract:
The boundaries of a scanned digital document are determined by identifying the largest connected component in the received digital document and assigning the boundaries of the largest connected component as the boundaries of the received digital document or by using a row by row and column by column analysis of the received digital document to identify horizontal and vertical bands in the digital image having pixels with a value opposite to the value of pixels of a background of the received digital document and assigning the horizontal and vertical bands to be the boundaries of the received digital document. These processes may be performed in series or parallel by a processor associated with a scanner that creates the digital document.
Abstract:
Die Erfindung betrifft ein Verfahren zur Erkennung der Breite und Position von Dokumenten (4) in einem großformatigen Scanner-System (1) anhand aufgenommener Bildinformationen, wobei das Scanner-System (1) Bilderfassungselemente (2) zur Aufnahme der Bildinformationen, eine davor angeordneten Optik (3) und einen den Bilderfassungselementen (2) gegenüber angeordneten Reflektor (5) aufweist, mit folgenden Schritten: 51 Vorverarbeitung der aufgenommenen Bildinformationen zur Reduzierung von Störungen durch Verschmutzungen von Optik (3) und Reflektor (5), 52 Groberkennung von horizontalen und/oder vertikalen Übergangsbereichen (12, 13) von Reflektor (5) auf das Dokument (4) und 53 Feinerkennung von horizontalen und/oder vertikalen Dokumentenkanten (10, 11 ) innerhalb der durch die Groberkennung gemäß Schritt S2 detektierten Übergangsbereiche (12, 13).
Abstract:
Systems and methods systems and methods for edge detection during an imaging operation are disclosed. In an exemplary implementation, a method may include subdividing an imaging area into a plurality of border detection zones. The method may also include scanning the imaging area including media to be scanned to obtain optical data for each of the plurality of border detection zones. The method may also include identifying at least one edge of the media based on change in the optical data between directly adjacent border detection zones, where the change indicates detection of a moiré pattern.