珠海网站建设解决方案,合肥网站建设案例,c 视频网站开发,河北邯郸特产之前调过一款摄像头#xff0c;是MT9V034#xff0c; 最近在调的是OV7725摄像头#xff0c;感觉OV7725摄像头比MT9V034要难#xff0c;特别是寄存器配置#xff0c;要想玩转一款摄像头#xff0c;必须要熟悉它的寄存器配置#xff0c;而且要亲自去调试#xff0c;然后才… 之前调过一款摄像头是MT9V034 最近在调的是OV7725摄像头感觉OV7725摄像头比MT9V034要难特别是寄存器配置要想玩转一款摄像头必须要熟悉它的寄存器配置而且要亲自去调试然后才能对它有很好的理解。下面是自己的一点见解可能不完全对不过希望对初学者有所帮助吧。
一、将所有寄存器的值复位到默认值状态。 寄存器地址 寄存器名称 寄存器值 0x12 COM7 0x80 //复位
二、 设置图像输出格式。 寄存器地址 寄存器名称 寄存器值 0x12 COM7 0X40 //QVGA320*240 YUV输出格式 0x29 HOutSize 0X50 // QVGA320*240 0x28 160 0x2C VOutSize 0X78 // QVGA 320*2400x3C 120 0x17 HSTART 0X3F //QVGA320*240 0X18 HSIZE 0X50 //QVGA320*240 0X19 VSTRT 0X03 //QVGA320*240 0X20 VSIZE 0X78 //QVGA320*240
---------------------------------------------------------------------------------------------------------------------------------- 12 COM7 00 RWCommon Control 7 Bit[7]: SCCB Register Reset 0: No change 1: Resets all registers to default values Bit[6]: Resolution selection 0: VGA 1: QVGA Bit[5]: BT.656 protocol ON/OFF selection Bit[4]: Sensor RAW Bit[3:2]: RGB output format control 00: GBR4:2:2 01: RGB565 10: RGB555 11: RGB444 Bit[1:0]: Output format control 00: YUV 01: Processed Bayer RAW 10: RGB 11: Bayer RAW -------------------------------------------------------------------------------------------------------------------------------三、和图片曝光强弱有关的寄存器1、自动曝光 寄存器地址 寄存器名称 寄存器值 0X0D COM4 0X40 //整个窗口进行自动曝光
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0D COM4 41 RWCommon Control 4 Bit[7:6]: PLL frequency control 00: Bypass PLL 01: PLL 4x 10: PLL 6x 11: PLL 8x Bit[5:4]: AEC evaluate window 00: Full window 01: 1/2 window 10: 1/4 window 11: Low 2/3 window Bit[3:0]: Reserved -------------------------------------------------------------------------------------------------------------------------0x13 COM8 0XFF // 打开自动增益(AGC)、自动白平衡(AWB)、自动曝光(AEC)-------------------------------------------------------------------------------------------------------------------------
13 COM8 8F RWCommon Control 8 Bit[7]: Enable fast AGC/AEC algorithm Bit[6]: AEC - Step size limit 0: Step size is limited to vertical blank 1: Unlimited step size Bit[5]: Banding filter ON/OFF Bit[4]: Enable AEC below banding value Bit[3]: Fine AEC ON/OFF control Bit[2]: AGC Enable Bit[1]: AWB Enable Bit[0]: AEC Enable -----------------------------------------------------------------------------------------------------------------------------------0X24 AEW 0X40 //控制自动曝光强弱 --------------------------------------------------------------------------------------------------------------------------------------------- 24 AEW 75 RW AGC/AEC - Stable Operating Region (Upper Limit) ----------------------------------------------------------------------------------------------------------------------------------------------0X25 AEB 0X15 //控制自动曝光的强弱---------------------------------------------------------------------------------------------------------------------------------------------------- 25 AEB 63 RW AGC/AEC - Stable Operating Region (Lower Limit) ------------------------------------------------------------------------------------------------------------------------------------------------------0X26 VPT 0X32 //快速模式工作区--------------------------------------------------------------------------------------------------------------------------------------------------------------- 26 VPT D4 RWAGC/AEC Fast Mode Operating Region Bit[7:4]: High nibble of upper limit of fast mode control zone Bit[3:0]: High nibble of lower limit of fast mode control zone -----------------------------------------------------------------------------------------------------------------------------------------------------------------0XA6 SDE 0X24 //使能控制图片亮暗的寄存器 --------------------------------------------------------------------------------------------------------------------------------------- A6 SDE 00 RWSpecial Digital Effect Control Bit[7]: Reserved Bit[6]: Negative image enable Bit[5]: Gray scale image enable Bit[4]: V fixed value enable Bit[3]: U fixed value enable Bit[2]: Contrast/Brightness enable Bit[1]: Saturation enable Bit[0]: Hue enable ----------------------------------------------------------------------------------------------------------------------------------------0X9B BRIGHT 0X08 //定义自动曝光时图片的亮度增益此值越大图片越亮 --------------------------------------------------------------------------------------------------------------------------
9B BRIGHT 00 RW Brightness Control --------------------------------------------------------------------------------------------------------------------------0XAB SIGN 0X06 //定义BRIGHT 的高位是正数还是负数如果为0x0e,则图片亮度是负的0-255图片越来越亮0 ~ -127图片越来越亮----------------------------------------------------------------------------------------------------------------------------------- AB SIGN 06 RWSign Bit for Hue and Brightness Bit[7:4]: Reserved Bit[3]: Brightness sign bit Bit[2]: Reserved Bit[1]: Sign bit for HueSin (in Cr’ equation) Bit[0]: Sign bit for HueSin (in Cb’ equation) --------------------------------------------------------------------------------------------------------------------------------------2、手动曝光寄存器地址 寄存器名称 寄存器值0X0D COM4 0X40 //整个窗口进行自动曝光-----------------------------------------------------------------------------------------------------------------------
0DCOM441RWCommon Control 4 Bit[7:6]: PLL frequency control 00: Bypass PLL 01: PLL 4x 10: PLL 6x 11: PLL 8x Bit[5:4]: AEC evaluate window 00: Full window 01: 1/2 window 10: 1/4 window 11: Low 2/3 window Bit[3:0]: Reserved -----------------------------------------------------------------------------------------------------------------------0x13 COM8 0Xcc // 关闭自动曝光(AEC)
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13COM88FRWCommon Control 8 Bit[7]: Enable fast AGC/AEC algorithm Bit[6]: AEC - Step size limit 0: Step size is limited to vertical blank 1: Unlimited step size Bit[5]: Banding filter ON/OFF Bit[4]: Enable AEC below banding value Bit[3]: Fine AEC ON/OFF control Bit[2]: AGC Enable Bit[1]: AWB Enable Bit[0]: AEC Enable ------------------------------------------------------------------------------------------------------------------------------------------0x08 AECH 0X00 //曝光值得高8位 改变AECH和AEC的值可以改变图片亮度---------------------------------------------------------------------------------------------------------------------------------------------------08 AECH 00 RWExposure Value – AEC MSBs Bit[7:0]: AEC[15:8] (see register AECfor AEC[7:0 Automatically updated based on chip output format ----------------------------------------------------------------------------------------------------------------------------------------------------0x10 AEC 0X40 //曝光值得低8位
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10 AEC 40 RWExposure Value Bit[7:0]: AEC[7:0] (see register AECHfor AEC[15:8]) -------------------------------------------------------------------------------------------------------------------------------------------------------
