Defective pixel shielding method and system

Abstract

The embodiment of the invention provides defective pixel shielding method and system, and aims at solving the problem that the storage of a defective pixel table is limited and the manufacturing cost of a chip is increased due to the limitation on the size of an SRAM in the chip in the prior art. The defective pixel shielding method comprises the following steps: storing the defective pixel table into an external storage of the chip; reading the defective pixel coordinate in the defective pixel table from the outer storage of the chip into an inner storage of the chip; shielding and processing display data falling into the defective pixel coordinate according to the defective pixel coordinate stored in the inner storage of the chip; removing the shielded and processed defective pixel coordinates in the inner storage of the chip; continuously reading the defective pixel coordinate from the outer storage of the chip and then storing into the cleared storage space in the inner storage of the chip.

Description

technical field [0001] The invention relates to the field of digital image processing, in particular to a dead pixel covering method and system. technical background [0002] The dead point cover in the prior art is to first detect the dead point of the image sensor through a special program, and save the coordinates of the bad point in a bad point table; Processing is performed to cover the display data falling into the bad point coordinates with the cover algorithm. Among them, the dead point table is stored in the single-port SRAM (static memory) inside the chip. Existing SRAM generally can only store 1024 bad point coordinates, and the bit width of each bad point coordinate is 12-bit. [0003] However, with the continuous improvement of the resolution of the image sensor, the number of dead pixels of the image sensor and the bit width of the coordinates of the bad pixels are also continuously increased. Taking an image sensor with 4K resolution as an example, the bit ...

AI Technical Summary

Problems solved by technology

[0004] In view of this, the embodiment of the present invention provides a new method and system for covering dead pixels, which solves the problems in the prior art that due to the limited size of the SRAM in the chip, the storage of the bad pixel table is limited and the cost of chip manufacturing is increased.

Images