Signal processing device, signal processing method

Abstract

In a signal processing system where a second image is generated based on a first image, and the brightness of the first and second images is controlled based on the detection results of the first and second images, respectively, the aim is to ensure that the brightness control of the second image is performed appropriately. [Solution] The signal processing device according to this technology comprises a first brightness control unit that controls the brightness of the first image based on the detection result of the first image, a second image generation unit that generates a second image different from the first image based on the first image whose brightness has been controlled by the first brightness control unit, and a second brightness control unit that controls the brightness of the second image based on the detection result of the second image, wherein the first control value used for brightness control by the first brightness control unit is used for brightness control by the second brightness control unit, or the second control value used for brightness control by the second brightness control unit is used for brightness control by the first brightness control unit.

Claims

1. A first brightness control unit that controls the brightness of the first image based on the detection result of the first image, A second image generation unit generates a second image different from the first image based on the first image whose brightness has been controlled by the first brightness control unit, The system includes a second brightness control unit that controls the brightness of the second image based on the detection result of the second image, The first control value used for brightness control by the first brightness control unit is used for brightness control by the second brightness control unit, or the second control value used for brightness control by the second brightness control unit is used for brightness control by the first brightness control unit. Signal processing device.

2. The first control value used for brightness control by the first brightness control unit is used for brightness control by the second brightness control unit. The signal processing apparatus according to claim 1.

3. The first image is a RAW image obtained by imaging. The first brightness control unit performs exposure control of the captured image as brightness control of the first image. The signal processing apparatus according to claim 1.

4. The second brightness control unit is The brightness of the second image is controlled based on the inter-frame difference in exposure values ​​obtained by the aforementioned exposure control. The signal processing apparatus according to claim 3.

5. The second brightness control unit is The first control value is the analog gain value used in the exposure control, and the brightness of the second image is controlled so that the sum of the analog gain value and the digital gain value obtained from the detection result and brightness target value of the second image does not exceed a predetermined upper limit. The signal processing apparatus according to claim 3.

6. The second control value used for brightness control by the second brightness control unit is used for brightness control by the first brightness control unit. The signal processing apparatus according to claim 1.

7. The first image is a RAW image obtained by imaging. The first brightness control unit performs exposure control of the captured image as brightness control of the first image. The first brightness control unit is The brightness of the first image is controlled based on a brightness difference value, which represents the difference between the target brightness value and the detected brightness of the second image. The signal processing apparatus according to claim 1.

8. The first brightness control unit is The brightness of the first image is controlled so that the brightness difference indicated by the brightness difference value is canceled out. The signal processing apparatus according to claim 7.

9. The system includes an image recognition processing unit that performs image recognition processing using an AI model on the aforementioned second image. The signal processing apparatus according to claim 1.

10. The signal processing unit A first brightness control process that controls the brightness of the first image based on the detection result of the first image, A second image generation process generates a second image different from the first image based on the first image whose brightness has been controlled by the first brightness control process, A second brightness control process is performed to control the brightness of the second image based on the detection result of the second image, The first control value used for brightness control in the first brightness control process is used for brightness control by the second brightness control process, or the second control value used for brightness control in the second brightness control process is used for brightness control by the first brightness control process. Signal processing method.

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