Electronic system

Abstract

An electronic system includes an image-sensing device and a processor coupled with the image-sensing device, The image-sensing device includes an image-sensing area configured to generate a picture. The picture includes a noisy region. The processor is configured to select a tracking region from the portion of the picture outside of the noisy region. The tracking region corresponds to an operative region of the image sensing area.

What is claimed is: 
     
         1 . An electronic system comprising:
 an image-sensing device comprising an image-sensing area that generates a picture comprising a noisy region; and   a processor coupled with the image-sensing device, configured to select a tracking region from the portion of the picture outside the noisy region, wherein the tracking region corresponds to an operative region of the image-sensing area.   
     
     
         2 . The electronic system of  claim 1 , comprising a screen, wherein the processor is configured to determine mapping data between the screen and the operative region. 
     
     
         3 . The electronic system of  claim 1 , wherein an edge of the tracking region is adjacent to or passes through a boundary pixel of the noisy region. 
     
     
         4 . The electronic system of  claim 1 , wherein the processor is configured to determine coordinate data of boundary pixels of the noisy region and to determine the tracking region using the coordinate data of the boundary pixels. 
     
     
         5 . The electronic system of  claim 1 , wherein the processor is configured to use a characteristic value of the tracking region to determine whether to output coordinate data. 
     
     
         6 . The electronic system of  claim 1 , further comprising a lighting device, wherein the processor is configured to subtract a second picture from a first picture when a characteristic value of the tracking region is less than a threshold, wherein the first picture comprises a dark image of an object taken when the lighting device is turned off, and the second picture comprises a bright image of the object taken when the object is illuminated by the lighting device. 
     
     
         7 . The electronic system of  claim 1 , further comprising a lighting device configured to emit intermittent light, which allows an object to alternatively fowl bright images in a plurality of successive pictures. 
     
     
         8 . The electronic system of  claim 7 , wherein the noisy region occurs in each picture of the plurality of successive pictures. 
     
     
         9 . An electronic system comprising:
 an image-sensing device generating a picture comprising a noisy region; and   a processor coupled with the image-sensing device, wherein the processor is configured to determine coordinate data by the noisy region and to determine a tracking region using the coordinate data.   
     
     
         10 . The electronic system of  claim 9 , further comprising a screen, wherein the processor is configured to determine mapping data between the screen and the tracking region.