Method and device for mapping gain conversion of image sensors

• Main Author: CHI GUOQUAN
• Format: Patent
• Language: Chinese; English
• Published: 26.09.2012
• Subjects: ELECTRIC COMMUNICATION TECHNIQUE; ELECTRICITY; PICTORIAL COMMUNICATION, e.g. TELEVISION

The invention discloses a method and a device for mapping gain conversion of image sensors. The image sensors comprise automatic gain control circuits and amplification circuits. The method includes the steps: receiving relative gain transmitted by the automatic gain control circuit; converting the relative gain into absolute gain according to a function relationship which is adjustable based on process variation; and mapping the absolute gain to each amplification circuit so as to form corresponding amplification circuit gain. The device comprises a gain conversion circuit and a gain mapping circuit, wherein the gain conversion circuit is connected with each automatic gain control circuit and used for receiving the relative gain transmitted by each automatic gain control circuit and converting the relative gain into the absolute gain according to the function relationship which is adjustable based on process variation; and the gain mapping circuit is connected with the gain conversion circuit and used for ma