Pixel defect correction device

A pixel defect correction circuit which corrects a point defect and a line defect of a plurality of pixels arranged along a horizontal direction and a vertical direction, the pixel defect correction circuit comprising:

• a unit which detects presence and a position of a point defect and a line defect;
• a unit which corrects a point defect pixel by calculating a pixel value of the point defect pixel from pixel values of surrounding pixels which are adjacent to the point defect pixel;
• a unit which calculates a first difference value between pixel values of a horizontal direction pixel and an upper-left pixel and a lower-right pixel which are adjacent to a target pixel to be corrected within a line defect pixel, a second difference value between pixel values of the horizontal direction pixel and an upper-right pixel and a lower-left pixel which are adjacent to the target pixel, and a third difference value between pixel values of the horizontal direction pixel and a left pixel and a right pixel which are adjacent to the target pixel;
• and
• a unit which corrects a vertical line defect pixel by calculating a pixel value of the target pixel from at least one of the pixel values of the upper-right pixel, the lower-right pixel, the upper-left pixel, and the lower-left pixel using a correction pattern corresponding to a relationship in magnitude of the first difference value, the second difference value, and the third difference value.

A pixel defect correction circuit which corrects a point defect and a line defect of a plurality of pixels arranged along a horizontal direction and a vertical direction, the pixel defect correction circuit comprising:

• a unit which detects presence and a position of a point defect and a line defect;
• a unit which corrects a point defect pixel by calculating a pixel value of the point defect pixel from pixel values of surrounding pixels which are adjacent to the point defect pixel;
• a unit which calculates a first difference value between pixel values of a vertical direction pixel and an upper-left pixel and a lower-right pixel which are adjacent to a target pixel to be corrected within a line defect pixel, a second difference value between pixel values of the vertical direction pixel and an upper-right pixel and a lower-left pixel which are adjacent to the target pixel, and a third difference value between pixel values of the vertical direction pixel and a left pixel and a right pixel which are adjacent to the target pixel;
• and
• a unit which corrects a horizontal line defect pixel by calculating a pixel value of the target pixel from at least one of the pixel values of the upper-right pixel, the lower-right pixel, the upper-left pixel, and the lower-left pixel using a correction pattern corresponding to a relationship in magnitude among the first difference value, the second difference value, and the third difference value.

A pixel defect correction circuit which corrects a point defect and a line defect of a plurality of pixels arranged along a horizontal direction and a vertical direction, the pixel defect correction circuit comprising:

• a unit which detects presence and a position of a point defect and a line defect;
• a unit which corrects a point defect pixel by calculating a pixel value of the point defect pixel from pixel values of surrounding pixels which are adjacent to the point defect pixel;
• and
• a unit which, when a point defect and a line defect are at adjacent positions, corrects a line defect pixel by calculating a pixel value of a target pixel to be corrected within the line defect from the pixel values of the surrounding pixels other than the line defect according to a pattern of the adjacent positions.