Information processing device and information processing method

A processing method comprising:

• determining that, when a difference between pixel values of two adjacent pixels in a plurality of pixels arranged to form a plurality of rows and a plurality of columns is within a first range, the two adjacent pixels belong to the same first connected pixel group;
• determining that a first condition is satisfied when, in a neighboring pixel group including a target pixel and a neighboring pixel arranged in a vicinity of the target pixel, a rank of a pixel value of the target pixel is higher than an upper limit of a second range or lower than a lower limit of the second range;
• determining that a second condition is satisfied when the number of pixels belonging to the first connected pixel group including the target pixel is equal to or less than a first threshold value;
• correcting the pixel value of the target pixel when at least the first condition and the second condition are satisfied;
• and
• determining that, in two adjacent first pixel and second pixel, when a difference between a pixel value of the first pixel and a representative value of a neighboring pixel group including a neighboring pixel arranged in a vicinity of the first pixel is outside a third range, and a difference between a pixel value of the second pixel and a representative value of a neighboring pixel group including a neighboring pixel arranged in a vicinity of the second pixel is outside a fourth range, the first pixel and the second pixel belong to the same second connected pixel group,
• wherein the pixel value of the target pixel is not corrected when the first condition is not satisfied, or when the second condition is not satisfied.

A processing device comprising:

• a first connecting unit configured to determine that, when a difference between pixel values of two adjacent pixels in a plurality of pixels arranged to form a plurality of rows and a plurality of columns is within a first range, the two adjacent pixels belong to the same first connected pixel group;
• a pixel value determination unit configured to determine that a first condition is satisfied when, in a neighboring pixel group including a target pixel and a neighboring pixel arranged in a vicinity of the target pixel, a rank of a pixel value of the target pixel is higher than an upper limit of a second range or lower than a lower limit of the second range;
• a first connection number determination unit configured to determine that a second condition is satisfied when the number of pixels belonging to the first connected pixel group including the target pixel is equal to or less than a first threshold value;
• a correction unit configured to correct the pixel value of the target pixel when at least the first condition and the second condition are satisfied and not to correct the pixel value of the target pixel when the first condition is not satisfied, or when the second condition is not satisfied;
• and
• a density determination unit configured to determine that a fifth condition is satisfied when, in a plurality of pixels within a predetermined range including the target pixel, the number of pixels in which a difference between a pixel value of a certain pixel and a representative value of a neighboring pixel group including a neighboring pixel arranged in a vicinity of the certain pixel is outside a fifth range is greater than a fifth threshold value.