Method and apparatus for image processing and on - vehicle camera apparatus

An image processing apparatus comprising edge-enhancement filter unit that enhances sharpness of an image, wherein

• the edge-enhancement filter unit includes:
• a distance calculating unit that calculates distance values, which are values of a distance between a target pixel and an optical center of a captured image in at least two axial directions;
• an edge detection filter corresponding to each of the axial directions, wherein each of the edge detection filter is configured to detect an edge amount in a corresponding one of at least two directions on an direction-by-direction basis;
• a multiplying unit corresponding to each of the edge detection filters, wherein each of the multiplying units multiplies the edge amount detected at a corresponding one of the edge detection filters by the distance value calculated by the distance calculating unit for a corresponding one of the axial directions;
• a first adding unit that adds up outputs of the multiplying units together;
• and
• a second adding unit that adds a pixel value of the target pixel to an output of the first adding unit.