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数据搜索系统，热门电子元器件搜索 |
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数据搜索系统，热门电子元器件搜索 |
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VG6640 数据表(PDF) 11 Page - STMicroelectronics |
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VG6640 数据表(HTML) 11 Page - STMicroelectronics |
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11 / 126 page  DocID023597 Rev 11 11/126 VG6640, VD6640 Overview 125 1.4 Image enhancement, status and test features The video processor integrates a wide range of image enhancement functions, designed to ensure high image quality. These include: • real-time exposure merging for High Dynamic Range (HDR) imaging • comprehensive set of motion and flicker minimising HDR options • flicker flag to indicate where flickering has been detected within a frame • digital per-channel gain stage for white balancing • external synchronization • windowing/image cropping • subsampling • analog, pixel and digital gain • dark calibration • frame crop • defective pixel correction • test pattern generation • statistics generation • embedded sensor status data (trailer, and header) 1.5 External frame synchronization The external frame synchronization features two modes which can be exploited to synchronize the frame start in multiple-camera systems. • Where an external frame synchronization signal is available, it can be applied to a dedicated synchronization ball. The sensor will synchronize its frame start to the edge of the synchronization signal. Further improvement to the synchronization accuracy can be achieved by applying a common clock to all cameras. • Where a frame synchronization signal is not available (remote cameras), an I2C register may be set to synchronize the frame start. The sensor will synchronize its frame start to the end of the I2C transmission of when the sync register is set. 1.6 Safety integrity A set of self diagnosis features allows the device to support the automotive safety integrity level (ASIL) system requirements: • ECC (error correction codes) for critical memories • analog in-line test modes • digital in-line test readout modes • dual temperature sensor • all diagnosis states can be read back from the internal registers and are also embedded in the image status data |
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