Patent Number: 6,674,404

Title: Apparatus and method for detecting and correcting defective pixels in image sensor

Abstract: A method for detecting and correcting a defective pixel in an image sensor including an M(row line).times.N(column line) unit pixels, M and N being positive integers, includes a first step of electrically scanning photoelectric charges generated from unit pixels of a first row line for a first integration time and storing a first data corresponding to the photoelectric charges, a second step of electrically scanning photoelectric charges generated from the unit pixels of the first row line for a second integration time and storing a second data corresponding to the photoelectric charges, a third step of comparing the first data and the second data one another, if the first data is different from the second data, an error signal is generated and then a corresponding address of the unit pixel is stored as a defective pixel address, a fourth step of repeating the first to the third step to an Mth line by increasing an address by one, and a fifth step of comparing an address of a unit pixel to be read with the defective pixel address, if the address of the unit pixel is equal to the defective pixel address, a correction operation is performed to generated a corrected data.

Inventors: Lee; Suk-Joong (Ichon-shi, KR), Kim; Sang-Yeon (Ichon-shi, KR)

Assignee: Hyundai Electronics Industries Co., Ltd.

International Classification: H04N 5/217 (20060101); G06K 009/40 ()

Expiration Date: 01/06/2021