Image signal processor and method for processing image signal

An image signal processor comprising:

• a pattern determiner configured to determine a pattern of a target kernel including a target pixel based on pixel data of pixels in the target kernel;
• a pixel interpolator configured to generate, when a similar characteristic defective pixel having a characteristic a same as a characteristic of the target pixel is positioned in a texture area of the pattern, dissimilar characteristic pixel data including at least one of a gradient or a ratio between dissimilar characteristic pixels positioned in the texture area, the dissimilar characteristic pixels representing pixels having a characteristic different from the characteristic of the target pixel;
• and
• a pixel interpolator configured to interpolate the target pixel based on the dissimilar characteristic pixel data.

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

• determining a defective pixel from among similar characteristic pixels, the similar characteristic pixels representing pixels having a characteristic a same as a characteristic of a target pixel included in a target kernel;
• determining a pattern of the target kernel based on pixel data of pixels included in the target kernel when the defective pixel is present;
• and
• when the defective pixel is positioned in a texture area of the pattern, interpolating the target pixel based on pixel data of pixels positioned in the texture area among dissimilar characteristic pixels and pixel data of pixels positioned in the texture area among the similar characteristic pixels, the dissimilar characteristic pixels representing pixels having a characteristic different from the characteristic of the target pixel.