Abstract: A method that includes obtaining a video signal of an object by a camera, obtaining an ambient light signal representing ambient light, obtaining a display signal representing light emitted by a display, obtaining a distance signal representing a distance between the display and the object, and modifying the video signal based on the ambient light signal, the display signal, and the distance signal, to obtain a modified video signal.

Abstract: A method including: obtaining, with an image processing apparatus, a white point that corresponds to an image captured by a camera with only the natural light as a light source; obtaining, with the image processing apparatus, a white point that corresponds to an image captured by the camera with only the artificial light as a light source; determining, with the image processing apparatus, a ratio of an intensity of natural light for a pixel to an intensity of an artificial light for the pixel within an image captured by a camera under mixed illumination of the natural light and the artificial light; and determining, with the image processing apparatus, a white point for the pixel in the image under mixed illumination based on the ratio of the intensity of natural light to the intensity of artificial light for the pixel in the image, the white point for only the natural light, and the white point for only the artificial light.

Abstract: A method including: obtaining, with an image processing apparatus, a white point that corresponds to an image captured by a camera with only the natural light as a light source; obtaining, with the image processing apparatus, a white point that corresponds to an image captured by the camera with only the artificial light as a light source; determining, with the image processing apparatus, a ratio of an intensity of natural light for a pixel to an intensity of an artificial light for the pixel within an image captured by a camera under mixed illumination of the natural light and the artificial light; and determining, with the image processing apparatus, a white point for the pixel in the image under mixed illumination based on the ratio of the intensity of natural light to the intensity of artificial light for the pixel in the image, the white point for only the natural light, and the white point for only the artificial light.

Abstract: A method that includes obtaining a video signal of an object by a camera, obtaining an ambient light signal representing ambient light, obtaining a display signal representing light emitted by a display, obtaining a distance signal representing a distance between the display and the object, and modifying the video signal based on the ambient light signal, the display signal, and the distance signal, to obtain a modified video signal.

Abstract: A method, system, and computer readable medium for detecting a face in a video stream including receiving a sequence of input color images; and for each input image, calculating a greyscale image of the input color image, creating a one-bit motion image based on the current and a previous greyscale image, calculating a normalized color image of the input color image, calculating a motion color probability image, providing at least the grayscale image and the motion color probability image to a face detector, and executing face detection by determining a presence of a face based on first features in the grayscale image and second features in the motion color probability image.

Abstract: A method for automatically determining an orientation and zoom of an image pickup device associated with a video conferencing system, wherein the method includes the steps of: generating, at the image pickup device, an image signal representative of an image framed by the image pickup device; processing the image signal to identify objects plural users of the video conferencing system in the image; steering the image pickup device to an initial orientation; determining a location of all the identified objects relative to a reference point and determining respective sizes of the identified objects; defining an area of interest in the image, wherein the area of interest includes all the identified objects; and steering the image pickup device to frame the defined area of interest including all the identified objects where a center of the frame substantially coincides with a center of all the identified objects.

Abstract: A method, system, and computer readable medium for detecting a face in a video stream including receiving a sequence of input color images; and for each input image, calculating a greyscale image of the input color image, creating a one-bit motion image based on the current and a previous greyscale image, calculating a normalized color image of the input color image, calculating a motion color probability image, providing at least the grayscale image and the motion color probability image to a face detector, and executing face detection by determining a presence of a face based on first features in the grayscale image and second features in the motion color probability image.

Abstract: A method for displaying an image on a display of a video conferencing apparatus, including: providing, at the display of the video conferencing apparatus, a primary image; providing, at the video conferencing apparatus, an observation angle of a viewer with respect to the display; modifying, at the video conferencing apparatus, the primary image by applying a scaling factor that is a function of the observation angle to the primary image, resulting in a modified image; and displaying the modified image on the display and the primary image on the display, wherein the modified image and the primary image are displayed in different viewing directions on a same display area of the display.

Abstract: A method for automatically determining an orientation and zoom of an image pickup device associated with a video conferencing system, wherein the method includes the steps of: generating, at the image pickup device, an image signal representative of an image framed by the image pickup device; processing the image signal to identify objects plural users of the video conferencing system in the image; steering the image pickup device to an initial orientation; determining a location of all the identified objects relative to a reference point and determining respective sizes of the identified objects; defining an area of interest in the image, wherein the area of interest includes all the identified objects; and steering the image pickup device to frame the defined area of interest including all the identified objects where a center of the frame substantially coincides with a center of all the identified objects.