Abstract:
A pointing device for a computer system includes: a first movement sensor for detecting movements of the device (1) along a first axis (X) and a second axis (Y); a second movement sensor, for detecting movements of the device (1) along a third axis (Z) not coplanar with the first and second axes (X, Y); and a processing unit (6) associated to the movement sensors for producing a plurality of movement signals (A X , A Y , A Z , V X , V Y , V Z , P X , P Y , P Z ) indicating the movement of the device (1) along the first, second, and third axes (X, Y, Z). The processing unit (6) includes a control stage (15), for controlling the production of the movement signals (A X , A Y , A Z , V X , V Y , V Z , P X , P Y , P Z ) on the basis of a response (S Z , A Z ) of the second movement sensor (5b).
Abstract:
The conversion into a progressive format of digital images organized in half-frames or fields with interlaced lines or rows envisages selecting (11, 12, 13) successive lines in one or more of said fields and reconstructing by pixels an image line set between the interlaced lines selected. The reconstruction operation (14 to 18) comprises the steps of:
creating a set of candidate patterns (P) associated to the work window (W) by selecting the patterns (P) to be considered within the window (W); applying to the patterns of the aforesaid set a first cost function (F) which is representative of the correlations between pairs of pixels; applying to the patterns of the aforesaid set a second cost function (NF) which is representative of the non-correlations between pairs of pixels; selecting, for each candidate pattern (P), respective internal correlations and external non-correlations, calculating corresponding scores (G) for the candidate patterns (P) using the aforesaid first cost function; selecting a best pattern by comparing the respective scores (G) of the candidate patterns (P) with at least one threshold (S); and selecting the pixels of the window (W) identified by the best pattern selected, then reconstructing the missing line by filtration starting from said pixels.