Color filter array and image sensor

A color filter array, comprising a plurality of color filter units each of which is a square array formed by an arrangement of four square pixels including a first color pixel, a second color pixel and two third color pixels, the first color pixel and the second color pixel being arranged side by side to form a row of the color filter unit, the two third color pixels being arranged side by side to form another row of the color filter unit, and a row pixel direction of the color filter unit relative to a horizontal direction being inclined by 45° to left or right;

• the color filter array being an inclined rectangular array formed by a plurality of pixels arranged periodically according to an arrangement rule of pixels in the color filter units, a number of pixels from an intermediate row to a first row or to a last row in a same direction of the color filter array being progressively decreased with a decrement of 1 or 2, and the number of pixels in the first row and the last row being 1 or 2.