Aptina的AP0100CS可與其市場領(lǐng)先的低光照CMOS傳感器產(chǎn)品結(jié)合，創(chuàng)建具有高分辨率和標準動態(tài)范圍(SDR)或?qū)拕討B(tài)范圍(WDR)的CCTV相機解決方案。AP0100CS集成了Aptina的先進圖像處理管道(pipeline)，具有令人驚嘆的視頻和低光照性能。借助用于寬動態(tài)范圍圖像再現(xiàn)(rendering)的高級局部色調(diào)映射(Advanced Local Tone Mapping, ALTM)功能，即使在非常困難的高對比度照明條件下也能夠生成高質(zhì)量的視頻。AP0100CS集成了具有高級轉(zhuǎn)換器功能的NTSC/PAL編碼器，可以提供模擬CCTV市場所需的高TV線分辨率。這款產(chǎn)品為中國市場設(shè)計人員提供了過去無法獲取全新相機設(shè)計方案;也就是說，能夠利用高端IP相機傳感器的高分辨率、內(nèi)在的卓越低光照性能及WDR能力，移植應(yīng)用于模擬CCTV監(jiān)控領(lǐng)域。這種強大的設(shè)計靈活性將會帶來令人激動的新型監(jiān)控攝像機。
Auto Exposure(自動曝光)
The auto exposure algorithm optimizes scene exposure to minimize clipping and saturation in critical areas of the image. This is achieved by controlling exposure time and analog gains of the external sensor as well as digital gains applied to the image. Auto exposure is implemented by a firmware algorithm that is running on the embedded microcontroller that analyzes image statistics collected by the exposure measurement engine, makes a decision, and programs the sensor and color pipeline to achieve the desired exposure. The measurement engine subdivides the image into 25 windows organized as a 5 x 5 grid.
Figure 16: 5 x 5 Grid
