Image signal processor and method of processing image signal

An image signal processor comprising:

• a defect pixel determination unit configured to determine whether a target pixel is a defect pixel based on first comparison data that are a result of comparing pixel data of the target pixel included in a target kernel with pixel data of each of a plurality of pixels having attributes identical with attributes of the target pixel;
• and
• a pixel interpolation unit configured to interpolate the pixel data of the target pixel by using pixel data of each of a plurality of pixels that are disposed at locations corresponding to a direction of the target kernel,
• wherein the identical attributes are attributes corresponding to an identical color and an identical channel;
• wherein the defect pixel determination unit is configured to generate third comparison data that are results of a comparison between pixel data of a neighboring pixel that neighbors the target pixel and pixel data of each of a plurality of pixels having attributes identical with attributes of the neighboring pixel and determine whether the target pixel is the defect pixel based on a difference value between the first comparison data and the third comparison data.

A method of processing an image signal, the method comprising:

• determining whether a target pixel is a defect pixel by comparing pixel data of the target pixel included in a target kernel with pixel data of a pixel corresponding to a color and channel identical with a color and channel of the target pixel;
• determining a direction of the target kernel by comparing pixel data of each of a plurality of pixels that are disposed within the target kernel with pixel data of each of a plurality of pixels corresponding to a color and channel identical with a color and channel of the plurality of pixels;
• and
• interpolating the pixel data of the target pixel by using pixel data of each of a plurality of pixels that are disposed at locations corresponding to a direction of the target kernel;
• wherein determining whether the target pixel is a defect pixel comprises comparing pixel data of each of a plurality of pixels that neighbor the target pixel with pixel data of each of a plurality of pixels corresponding to a color and channel identical with a color and channel of the pixels that neighbor the target pixel.