Abstract: A film scanning method is provided. When the film is judged as a negative film, the scanning device sets the scan exposure time for the film according to the base background color of the film. The negative film is scanned for the scan exposure time, wherein, the film passes through the scanning device at one time so as to complete the above judge of the film type and scanning of the film. The film scanning method automatically completes the recognition of film type, performs accurate scanning based on the scan exposure time, expands the dynamic range and reduces noise impacts, so as to obtain a scanned image with higher accuracy.

Abstract: A method of automatically identifying a scan region boundary, used for scanning a document under a non-unified background, includes: reading a reference linear scan data by a scanning device, the scanning device analyzing brightness values in each row of the reference linear scan data and determining a reference range value according to the brightness values in each row; and during scanning a document, the scanning device comparing brightness values of a linear scan data with the reference range value so as to determine the scan region boundary. The method confirms the scan boundary of a document and is not subjected to a backlight element or a document carrier. The method identifies the boundary of a document under a non-unified background, is applicable to scanning transparent and reflective documents and has strong resistance against environmental interference, not only simplifying the scanning device but also enhancing the automatic performance.

Abstract: A film scanning method is provided. When the film is judged as a negative film, the scanning device sets the scan exposure time for the film according to the base background color of the film. The negative film is scanned for the scan exposure time, wherein, the film passes through the scanning device at one time so as to complete the above judge of the film type and scanning of the film. The film scanning method automatically completes the recognition of film type, performs accurate scanning based on the scan exposure time, expands the dynamic range and reduces noise impacts, so as to obtain a scanned image with higher accuracy.

Abstract: A method of automatically identifying a scan region boundary, used for scanning a document under a non-unified background, includes: reading a reference linear scan data by a scanning device, the scanning device analyzing brightness values in each row of the reference linear scan data and determining a reference range value according to the brightness values in each row; and during scanning a document, the scanning device comparing brightness values of a linear scan data with the reference range value so as to determine the scan region boundary. The method confirms the scan boundary of a document and is not subjected to a backlight element or a document carrier. The method identifies the boundary of a document under a non-unified background, is applicable to scanning transparent and reflective documents and has strong resistance against environmental interference, not only simplifying the scanning device but also enhancing the automatic performance.

Abstract: Methods and systems for recognizing a film in a scanner are provided. First, the film is previewed by the scanner to obtain an original preview image. The original preview image comprises a film image corresponding to the film. The original preview image also comprises pixels and each pixel has a first hue value, a second hue value, and a third hue value. The pixels with luminance in a predetermined range are then selected from the original preview image to acquire a second preview image. Next, the second preview image is framed according to the first hue values of the pixels to obtain an image frame. Finally, the image frame is sectioned to recognize the film image.

Abstract: A method for scanning and processing a negative film used in a scanner is disclosed. The method includes scanning the negative film to generate an original image; performing a calibration algorithm on the original image according to a calibration curve; and performing a negative algorithm on the calibration image by using negative characteristic parameters of the standard scanner to generate a final image.

Abstract: Methods and systems for recognizing a film in a scanner are provided. First, the film is previewed by the scanner to obtain an original preview image. The original preview image comprises a film image corresponding to the film. The original preview image also comprises pixels and each pixel has a first hue value, a second hue value, and a third hue value. The pixels with luminance in a predetermined range are then selected from the original preview image to acquire a second preview image. Next, the second preview image is framed according to the first hue values of the pixels to obtain an image frame. Finally, the image frame is sectioned to recognize the film image.