Image processing apparatus and computer-readable storage medium

Abstract

An image processing system according to an embodiment includes a cart having a first processor and a camera mounted on the cart. The camera photographs an object and generates an image. The first processor corrects focus of the camera based on correction information to bring the camera into focus with the object to be photographed. A second processor: calculates a standard deviation and an entropy based on tone information of pixels in the image, calculates a ratio between the standard deviation and the entropy, compares the ratio and a reference value, determines the correction information based on the comparison result, and provides the correction information to the first processor.

What is claimed is: 
     
         1 . An image processing apparatus comprising:
 a cart;   a camera, mounted on the cart, that acquires an image of an object; and   a processor configured to
 calculate a standard deviation and an entropy based on tone information of pixels in the image, 
 calculate a ratio between the standard deviation and the entropy, 
 determine correction information based on the ratio and a reference value, and 
 control focus of the camera based on the correction information to bring the camera into focus with the object. 
   
     
     
         2 . The image processing apparatus according to  claim 1 , further comprising:
 a display configured to display a comparison result of the ratio and the reference value, wherein   the processor compares the ratio and the reference value, and determines the correction information based on the comparison result.   
     
     
         3 . The image processing apparatus according to  claim 2 , further comprising:
 a speaker configured to provide audio output of the comparison result.   
     
     
         4 . The image processing apparatus according to  claim 1 , further comprising:
 a memory, wherein
 the processor updates the reference value based on a value of the ratio, and 
 the memory stores the updated reference value. 
   
     
     
         5 . The image processing apparatus according to  claim 1 , wherein
 the cart includes a wheel that is driven to move the cart.   
     
     
         6 . The image processing apparatus according to  claim 1 , wherein
 the reference value is a predetermined threshold value.   
     
     
         7 . The image processing apparatus according to  claim 1 , wherein
 the reference value is a maximum value of the ratio.   
     
     
         8 . The image processing apparatus according to  claim 1 , wherein
 the processor divides the image into a plurality of blocks, and calculates the standard deviation and the entropy of each block.   
     
     
         9 . An image processing apparatus comprising:
 a cart;   a camera, mounted on the cart, that acquires an image of an object; and   a processor configured to
 calculate a standard deviation and an entropy based on tone information of pixels in the image, 
 calculate a ratio between the standard deviation and the entropy, 
 determine correction information based on the ratio and a reference value, and 
 control movement of the cart to correct a distance between the cart and the object based on the correction information to bring the camera into focus with the object. 
   
     
     
         10 . The image processing apparatus according to  claim 9 , further comprising:
 a display configured to display a comparison result of the ratio and the reference value, wherein   the processor compares the ratio and the reference value, and determines the correction information based on the comparison result.   
     
     
         11 . The image processing apparatus according to  claim 10 , further comprising:
 a speaker configured to provide audio output of the comparison result.   
     
     
         12 . The image processing apparatus according to  claim 9 , further comprising:
 a memory, wherein   the processor updates the reference value based on a value of the ratio, and   the memory stores the updated reference value.   
     
     
         13 . The image processing apparatus according to  claim 9 , wherein
 the cart includes a wheel that is driven to move the cart.   
     
     
         14 . The image processing apparatus according to  claim 9 , wherein
 the reference value is a predetermined threshold value.   
     
     
         15 . The image processing apparatus according to  claim 9 , wherein
 the reference value is a maximum value of the ratio.   
     
     
         16 . The image processing apparatus according to  claim 9 , wherein
 the processor divides the image into a plurality of blocks, and calculates the standard deviation and the entropy of each block.