Abstract: A brightness adjusting method for video frames of a video sequence includes receiving a current video frame of the video sequence and performing a scene change detection to determine if a scene change occurs between the current video frame and a previous video frame. Thereafter, one of a plurality of candidate brightness adjusting schemes is applied to the current video frame according to a scene change detection result.

Abstract: A brightness adjusting method for video frames of a video sequence includes receiving a current video frame of the video sequence and performing a scene change detection to determine if a scene change occurs between the current video frame and a previous video frame. Thereafter, one of a plurality of candidate brightness adjusting schemes is applied to the current video frame according to a scene change detection result.

Abstract: A method for adjusting display characteristic of a video frame according to luminance statistics corresponding to pixels in the video frame is disclosed. The method includes identifying a first target value and a second target value from the luminance statistics, and then separately adjusting the display characteristic of the pixels corresponding to the first target value and the second target value in the video frame.

Abstract: A method of color index searching in a color picture. An estimated color index X and an estimated range Y are obtained. An index range is set according to the estimated color index X and the estimated range Y. A color dimension of color signals corresponding to the index range is altered to make the color signals responding to the color dimension alteration. It is determined whether a designated region is responsive. If the designated region is not responsive, the estimated color index X is changed to update the index range for another color dimension alteration. If the designated region is responsive, the estimated range Y is reduced to update the index range for another color dimension alteration. If the estimated range reaches an acceptable range, the color index of the designated regions is found.

Abstract: A method to transform video data having an interest region by wavelet transform signal processing. First, the video data is transformed to high frequency image data and low frequency image data. Then, first image data recording first information responding to the interest region of the video data and second image data recording second information responding to the interest region of the video data from the high frequency image data are received. The first image data and the low frequency image data are combined to form interest region data. The interest region data and the second image data are combined by bit plane coding to generate display data. Finally, a display device displays the display data.

Abstract: A method to transform video data having an interest region by wavelet transform signal processing. First, the video data is transformed to high frequency image data and low frequency image data. Then, first image data recording first information responding to the interest region of the video data and second image data recording second information responding to the interest region of the video data from the high frequency image data are received. The first image data and the low frequency image data are combined to form interest region data. The interest region data and the second image data are combined by bit plane coding to generate display data. Finally, a display device displays the display data.