图像曝光状态的双向快速判定方法及电路实现

Fast Bidirectional Detection Method and Circuit Implementation of Image Exposure Status

自动曝光是数字图像处理中的重要一环.针对图像的曝光状态判定,提出一种快速双向算法.该方法运算复杂度和运算量均较低,从而能够快速地判断图像的曝光状态,提高图像曝光控制的实时性,保证整个数字图像处理系统能实时可靠地运转.该方法实现的硬件电路具有简单、实时控制性好的特点,在移动设备中有较高的应用价值.

Auto exposure is a very important part in digital image signal processing. Based on detection of the image exposure status,a fast bidirectional detection method was presented. Both the computational complexity and the calculated amount of the method are low,which can quickly determine the exposure status of the image,improve the real time capability in image exposure control,and make the whole digital image signal processing system working smoothly and reliably. The circuit of the method is simple and easy to control,thus having a higher application value in mobile device.