Abstract:
A system and method are provided for interpreting time stamp information from a digital camera. The method comprises: opening a first format interpreter; receiving image information from a digital camera in a first format selected from the group including joint photographic experts group (JPEG) and tagged image file format (TIFF) formats, with a corresponding time stamp information; displaying the images with corresponding time stamps for editing; selecting the “print time stamp” option; selecting a time stamp layout for a corresponding image; converting the image information and time stamp information to bitmap information; and, supplying the edited images with corresponding time stamps for printing. Some aspects of the method further comprise: selecting miscellaneous superposition overlays for corresponding images. Then, supplying the images with corresponding time stamps for printing including supplying images with the selected superposition overlays such as text messages, backgrounds, clipart, and image borders.

Description:
BACKGROUND OF THE INVENTION  
         [0001]    1. Field of the Invention  
           [0002]    This invention generally relates to digital photography and, more particularly, to a system and method for hardcopy printing the time stamp information that accompanies the image of a corresponding digital photograph.  
           [0003]    2. Description of the Related Art  
           [0004]    Conventionally, when digital images are downloaded into a personal computer or specialized printer, an application must be used to open the image first, before a Joint Photographic Experts Group (JPEG) or Tag Image File Format (TIFF) image file can be operated on. Then, a printer driver is used to convert the data into a printer-ready format. Some prior art printer drivers provide users with the ability to embed some additional information into the output image. For example, users can add watermarks or backgrounds to the printing data. Prior art printer drivers work well on most image files, however, some information of the image file generated by a digital camera is lost in the printing process. Specifically, when these prior art printer drivers process images generated by a digital camera, the date or time stamp information for the corresponding pictures is lost.  
           [0005]    Industrial printers exist that provide a limited capability for editing an image at the printer. These specialized printers allow the user to add prepress operations including adding page numbers, header/footer text, or photos and/or halftones to an existing page of text. However, these printers do not allow the user to extract date information from an image file before a hard copy of the image is made. It is also known to digitally modify raster data or embed signatures within visual images in both digital representation and print or film. However, there is no process of printing the time stamp with an image using a conventional printer.  
           [0006]    It would be advantageous if the time stamp information that accompanies the image information downloaded from a digital camera could be used.  
           [0007]    It would be advantageous if a user could easily select the time stamp to be included on the printed image. Likewise, it would be advantageous if the presentation and placement of time stamp information on the image could be easily manipulated by a user.  
         SUMMARY OF THE INVENTION  
         [0008]    The present invention uses the printer front panel and the information from the image itself to produce user-desired output, such as including the time stamp information with the printed image. What makes the invention different from the prior art is:  
           [0009]    1) The user does not need a specific print driver configured to modify the bitmap data stream;  
           [0010]    2) The user does not need a particular viewer or reader to open the image prior to sending the image to the printer;  
           [0011]    3) The information from the image is fully utilized to produce user-desired output; and,  
           [0012]    4) The user can use the printer&#39;s front panel to locate the time stamp information on the printed image.  
           [0013]    The present invention adds a JPEG or TIFF interpreter to the printer controller, and utilizes the printer front panel to communicate with the user. Since the printer controller receives all the image file information when the image is downloaded from the camera, the time stamp information can be embedded into the bitmap data sent to the printer engine. By employing the present invention, the images when printed, will look similar to those developed by photo-processing centers wherein the date information is located on or adjacent to the image. In contrast to images printed by photo-processing centers, user communications with the printer&#39;s front panel are used to select where the date information is located on the image, or if the date information is printed at all.  
           [0014]    Accordingly, a method is provided for interpreting time stamp information from a digital camera. The method comprises: opening a first format interpreter; receiving image information from a digital camera in a first format selected from the group including joint photographic experts group (JPEG) and tagged image file format (TIFF) formats, with a corresponding time stamp information; displaying the images with corresponding time stamps for editing; selecting the “print time stamp” option; selecting a time stamp layout for a corresponding image; converting the image information and time stamp information to bitmap information; and, supplying the edited images with corresponding time stamps for printing.  
           [0015]    Some aspect of the method further comprise: selecting miscellaneous superposition overlays for corresponding images. Then, supplying the images with corresponding time stamps for printing including supplying images with the selected superposition overlays such as text messages, backgrounds, clipart, and image borders.  
           [0016]    Additional details of the above-described method, and a system for interpreting time stamp information from a digital camera are provided below. 
       
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS  
       [0017]    [0017]FIG. 1 is a schematic block diagram illustrating the present invention system for interpreting time stamp information from a digital camera.  
         [0018]    [0018]FIG. 2 is a schematic block diagram featuring a different aspect of the present invention system of FIG. 1.  
         [0019]    [0019]FIG. 3 is a flowchart illustrating the present invention method for interpreting time stamp information from a digital camera. 
     
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS  
       [0020]    [0020]FIG. 1 is a schematic block diagram illustrating the present invention system for interpreting time stamp information from a digital camera. The system  100  comprises a controller  102  having a port on line  104  to receive image information from a digital camera  106  in a first format. Conventionally, the connection represented by line  104  is universal serial bus (USB), however, the present invention is not limited to any particular interface protocol. The controller  102  receives image information from the digital camera  106  in a first format that includes the JPEG or TIFF formats. However, the present invention system is not limited to any particular type of image format. The image information is supplied with a corresponding time stamp. The controller  102  has a port on line  108  to supply images with corresponding time stamps, converted into bitmap information.  
         [0021]    A user interface  110  has a port on line  112  connected for communication with the controller  102 . A printer engine  114  has a port connected to the controller  102  on line  108  for accepting the images with corresponding time stamps for printing. A specialized photography printer  116  is shown encompassing the user interface  110  and printer engine  114  functions. In some aspects, the printer can be a conventional dot-matrix or laser printer associated with a PC. As is understood in the art, lines  112  and  108  may be a common bus in some aspects of the system  100 .  
         [0022]    [0022]FIG. 2 is a schematic block diagram featuring a different aspect of the present invention system  100  of FIG. 1. As shown, the digital camera  106  is connected to a personal computer (PC)  200  on line  202 . The PC  200  is connected to the printer  116  via line  204 . In some aspects of the system  100 , line  204  can be a parallel port cable or USB connection. Alternately, line  204  can represent a network connection, such as a local area network (LAN) connection, to name but one example. The user interface  110  can be a printer front panel, as in FIG. 1, or a display and keyboard user interface  206  (or equivalent) connected to the PC  200  on line  208 .  
         [0023]    Referring now to both FIGS. 1 and 2, regardless of which system aspect is used, the user interface  110 / 206  accepts time stamp print user prompts and supplies instructions to the controller  102  for printing a time stamp. The controller  102  supplies time stamp information, with its corresponding image, as bitmap information on line  108  in response time stamp print commands from the user interface.  
         [0024]    In some aspects of the system  100 , the user interface  110 / 206  receives images for display. The user interface  110 / 206  also receives image modification user prompts. For example, the user may be able to magnify a portion of the image in response. Conventionally, there are many image modifications that can be made to digital photographs before they are hardcopy printed. The user interface  110 / 206  supplies commands to the controller  102  for modifying the images with corresponding time stamps, and the controller  102  modifies the bitmap image data in response to commands from the user interface.  
         [0025]    The user interface  110 / 206  accepts user prompts for selecting a time stamp layout on a corresponding image, and supplies the time stamp layout commands to the controller  102 . The controller  102  accepts the time stamp layout information and provides images with corresponding time stamp layouts for printing in response to the time stamp layout commands. More specifically, the time stamp layouts include features such as the location of the time stamp on the image, the time stamp font style, the time stamp font size, and the time format. The time format refers to expression of a date as “Jan. 1, 2002”, or “Jan. 01, 2002”. The time format also controls the ordering of the day, month, and year. In some aspects of the invention, the time stamp information includes the time (the hour and minute of the day). As above, the user has the option of representing the time in many formats. For example, the time can be represented as AM/PM or military time.  
         [0026]    In some aspects of the system  100 , the user interface  110 / 206  also accepts prompts for selecting miscellaneous superposition overlays for corresponding images. The controller  102  supplies images for printing with the corresponding superposition overlays in response to the miscellaneous superposition overlay prompts. More specifically, superposition overlays such as text messages, backgrounds, clipart, and image borders can be created and sent to the printer engine  114  as bitmap data.  
       Functional Description  
       [0027]    The present invention system permits a user to modify or add information to a printed image through a user interface, such as a printer front panel. Once the printer controller receives the data, it invokes the proper interpreter such as JPEG or TIFF to parse the data and embeds the user desired information (date, description etc) to the image data.  
         [0028]    In one aspect (FIG. 1), the printer consists of an engine, controller, user interface, and a USB port. The USB port allows the user to directly connect a digital camera&#39;s flash card to the printer. Once the card is inserted into the smart media, the printer controller starts reading and parsing the data. Once this process is completed, the images are shown on the printer&#39;s front panel or on the printer&#39;s embedded web page if the printer has one. At this point, the user can select the image they want to print. By monitoring the current setting of the front panel, the controller makes decisions on whether to embed the date (time stamp) information in the bitmap information being sent to the print engine. If users choose to include the date information, certain fonts can also be selected for the conversion of JPEG or TIFF date information into the raster or bitmap data. According to the orientation of the image, the time stamp raster data is then embedded into the proper part (i.e., lower left part for portrait orientation and lower right part for landscape orientation) of the image data. Then, the whole image data (image plus time stamp) is converted to bitmap data rendered to the printer engine for printing.  
         [0029]    The user interface also gives users the ability to add a “picture frame” and descriptive text to the image. For example, if the images taken from the digital camera are from a child&#39;s birthday party, the user may want to type “Sam&#39;s 7th Birthday Party”. This descriptive text is then included on the printed image. The descriptive text “Sam&#39;s 7th Birthday Party” will be printed on all of the images sent to the printer until the user changes it. From the front panel, the user may embed other description information including names and clipart that is printed on the image.  
         [0030]    [0030]FIG. 3 is a flowchart illustrating the present invention method for interpreting time stamp information from a digital camera. Although the method is depicted as a sequence of numbered steps for clarity, no order should be inferred from the numbering unless explicitly stated. It should be understood that some of these steps may be skipped, performed in parallel, or performed without the requirement of maintaining a strict order of sequence. The method starts at Step  300 . Step  302  receives image information from a digital camera in a first format with corresponding time stamp information. In some aspects, receiving image information from a digital camera in a first format in Step  302  includes receiving information in a first format such as JPEG or TIFF formats. Step  304  displays the images with corresponding time stamps for editing. Step  306  converts the image information and time stamp information to bitmap information. Step  308  supplies the images with corresponding time stamps for printing. If edited, the edited images with corresponding time stamps are supplied for printing.  
         [0031]    In some aspects, Step  301  opens a first format interpreter. Then, receiving image information from a digital camera in a first format in Step  302  includes using the first format interpreter to accept the image information and corresponding time stamp. Converting the image information and time stamp to bitmap information in Step  306  includes using the first format interpreter to convert the image information and corresponding time stamp into bitmap information.  
         [0032]    In some aspects of the method, Step  305   a  selects the “print time stamp” option. Then, converting the image information and time stamp to bitmap information in Step  306  includes converting the time stamp into bitmap information in response to selecting the “print time stamp” option. Note, in this aspect of the method the time stamp information is not printed unless the “time stamp option” is selected. Alternately, the method can automatically print the time stamp information.  
         [0033]    In other aspects, Step  305   b  selects a time stamp layout for a corresponding image. Selecting the time stamp layout for the corresponding image includes selecting features such as the location of the time stamp on the image, the time stamp font style, the time stamp font size, and the time format. If the time stamp includes hour and minute information, this information can also be selectively included as part of the time stamp. Then, supplying the images with corresponding time stamps for printing in Step  308  including supplying the image with the selected time stamp layout.  
         [0034]    In some aspects of the method, Step  305   c  selects miscellaneous superposition overlays for corresponding images. Selecting miscellaneous superposition overlays for corresponding images includes selecting an overlay such as a text messages, backgrounds, image borders, and clipart. Then, supplying the images with corresponding time stamps for printing in Step  308  including supplying images with the selected superposition overlays.  
         [0035]    A system and method have been presented for interpreting time stamp information downloaded from a digital camera, so that it can be included in the printed image. Specific examples have been given as to how the invention may be enabled, but the invention is not necessarily limited to just these examples. Likewise, examples have been given for the kind of modifications that can be performed on a printed image. Again, the invention is not limited to just these examples. Other variations and embodiments of the invention will occur to those skilled in the art.