CN108259702B - 一种用于同步多传感器成像器中的照明定时的方法和系统 - Google Patents

一种用于同步多传感器成像器中的照明定时的方法和系统 Download PDF

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CN108259702B
CN108259702B CN201611235124.3A CN201611235124A CN108259702B CN 108259702 B CN108259702 B CN 108259702B CN 201611235124 A CN201611235124 A CN 201611235124A CN 108259702 B CN108259702 B CN 108259702B
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CN108259702A (zh
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陈锋
任杰
屈海明
张晴
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Hand Held Products Inc
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    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/70—Circuitry for compensating brightness variation in the scene
    • H04N23/745—Detection of flicker frequency or suppression of flicker wherein the flicker is caused by illumination, e.g. due to fluorescent tube illumination or pulsed LED illumination
    • H—ELECTRICITY
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    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
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    • H04—ELECTRIC COMMUNICATION TECHNIQUE
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    • H04N13/00—Stereoscopic video systems; Multi-view video systems; Details thereof
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
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    • H04N13/00—Stereoscopic video systems; Multi-view video systems; Details thereof
    • H04N13/20—Image signal generators
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    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N13/00—Stereoscopic video systems; Multi-view video systems; Details thereof
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/45—Cameras or camera modules comprising electronic image sensors; Control thereof for generating image signals from two or more image sensors being of different type or operating in different modes, e.g. with a CMOS sensor for moving images in combination with a charge-coupled device [CCD] for still images
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
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    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/70—Circuitry for compensating brightness variation in the scene
    • H04N23/73—Circuitry for compensating brightness variation in the scene by influencing the exposure time
    • H—ELECTRICITY
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    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N25/00—Circuitry of solid-state image sensors [SSIS]; Control thereof
    • H04N25/50—Control of the SSIS exposure
    • H04N25/53—Control of the integration time
    • H04N25/533—Control of the integration time by using differing integration times for different sensor regions

Abstract

提供了一种用于同步多传感器成像器中的照明脉冲的方法和系统。所述方法具有以下步骤：从照明控制块提供用于N个传感器中的每个的照明脉冲；将N个照明脉冲中的每个设定为具有相同的脉冲周期和有效脉冲宽度；将用于N个照明脉冲中的每个的有效宽度脉冲设定为具有用于N个图像传感器中的每个的最大曝光时间；在图像捕获的初始化期间确保捕获帧的时间加上后续图像捕获之间的时间间隔对于每个传感器而言是相同的；监视用于每个传感器的帧同步信号和对应的照明脉冲；从监视步骤获得后续帧同步信号之间的偏移周期；调整帧捕获之间的间隔；以及将帧同步信号的负边沿与对应的照明脉冲对齐。

Description

一种用于同步多传感器成像器中的照明定时的方法和系统
技术领域
本发明涉及多传感器成像系统，以及尤其是涉及在这种系统中的照明技术。
背景技术
一般而言，随着新成像技术的发展和对于日益增长的更好成像产品的客户需求，具有专用中央处理单元（CPU）的多传感器成像系统是必要的。对于更好的用户体验和功率效率而言，用于传感器的照明系统必须是同步的，以便覆盖公共视场（FOV）区域并且提高照明强度。
必须将一些照明与同步照明隔离，以避免与其他传感器相干扰。然而，在大多数情况下，照明脉冲被传感器（诸如全局快门传感器）控制。将传感器的操作和照明脉冲进行同步是困难的。
例如，一个CPU包括一个或两个成像传感器接口。在双光学图像扫描仪中，存在至少四个侧面（底部侧面、顶部侧面、左侧面和右侧面）来捕获图像。需要两个至四个CPU来支持四个图像传感器。一般地，每个图像传感器具有其自己的照明源。如果来自每个图像传感器的照明定时不是受控的，则例如，来自顶部侧面的照明可以直接进入到底部侧面传感器中。通常，根据即时要求，图像传感器的定时被调整为避免照明冲突并且改善照明重叠。然而，在各种CPU系统中，难以调整传感器定时来得到适当的照明时间，无论其是重叠定时还是非重叠定时。
因此，存在对于一种多传感器照明定时控制的需求，该多传感器照明定时控制实现起来是简单的并且提供稳定照明而没有闪烁。
发明内容
由此，在一个方面中，本发明涵盖了一种用于同步多传感器成像器中的照明定时的系统。
在示例性实施例中，所述系统包括数量N个具有有效脉冲照明的图像传感器，N是>2的自然数。每个传感器被配置成生成用于图像捕获的帧同步信号(FENN)，其中下标N指示与所述帧同步信号相对应的图像传感器。所述系统进一步包括至少两个CPU。所述CPU中的每个控制数量N个图像传感器中的至少1个。所述系统进一步包括与所述CPU中的每个通信链接的照明控制块。所述照明控制块被配置成生成用于N个图像传感器中的每个的照明脉冲。用于N个图像传感器中的每个的照明脉冲被设定为具有相同的脉冲周期（Tp）和有效脉冲宽度（Wp）。用于每个照明脉冲的有效宽度脉冲被设定为具有用于N个图像传感器中的每个的最大曝光时间。照明控制块被进一步配置成将用于照明脉冲的脉冲周期（Tp）和有效脉冲宽度（Wp）传送到所述CPU中的每个。所述CPU中的每个被配置成在图像捕获的初始化期间确保捕获帧的时间（Tfr）加上后续帧捕获之间的时间间隔(Twait)等于由照明控制块所传送的照明脉冲周期TP，并且因此对于每个传感器而言是相同的，Tfr1 + Twait1 = Tfr2 + Twait2 =TfrN + TwaitN。所述CPU中的每个被进一步配置成监视用于在特定CPU的控制下的图像传感器的帧同步信号（FENN）和对应的照明脉冲。此外，所述CPU中的每个被配置成计算偏移周期（TdN和TdN+1），所述偏移周期处于照明脉冲的负边沿和与N个图像传感器中的每个相对应的帧同步信号的负边沿之间。所述CPU中的每个被进一步配置成将所述TwaitN调整为TwaitNR，其中TwaitNR = TwaitN + TdN。最后，所述CPU中的每个被配置成将FENN的负边沿与对应照明脉冲对齐。
在系统的另一个示例性实施例中，所述CPU中的每个在一对一的基础上与所述数量N个传感器相对应。
在系统的另一个示例性实施例中，所述CPU中的每个控制所述数量N个传感器中的2个。
在系统的另一个示例性实施例中，所述照明控制块选自以下各项：中央处理单元（CPU）、复杂可编程逻辑器件（CPLD）、以及现场可编程门阵列（FPGA）。
在系统的另一个实施例中，所述CPU中的每个被配置成利用有效积分时间来将对应图像传感器图像捕获进行积分。
在系统的另一个实施例中，所述CPU中的每个被配置成根据所述脉冲宽度(Wp)来限制所述对应图像传感器的有效积分时间。
在系统的另一个示例性实施例中，在TintN > Wp的基础上，所述有效积分时间是Wp，TintN是由图像传感器N设定的用于曝光的像素积分时间。
在系统的另一个示例性实施例中，在TintN < Wp的基础上，所述有效积分时间是TintN，其中TintN是由传感器N设定的用于曝光的像素积分时间。
在系统的另一个示例性实施例中，每个照明脉冲具有与对应图像传感器的帧速率相等的频率。
在系统的另一个示例性实施例中，每个照明脉冲具有与对应图像传感器的帧速率的两倍相等的频率。
在另一个方面，本发明涵盖了一种用于同步具有数量N个传感器的多传感器成像器中的有效照明脉冲的方法，其中N是非零自然数以及与周期（T）和帧同步信号（FEN）相结合的下标N与对应传感器相关。
在示例性实施例中，所述方法包括以下步骤：（a）从照明控制块提供用于N个传感器中的每个的照明脉冲；（b）将N个照明脉冲中的每个设定为具有相同的脉冲周期（Tp）和有效脉冲宽度（Wp）；（c）将用于N个照明脉冲中的每个的有效宽度脉冲设定为具有用于N个图像传感器中的每个的最大曝光时间；（d）在图像捕获的初始化期间确保捕获帧的时间（Tfr）加上后续图像捕获之间的时间间隔（Twait）对于每个传感器而言是相同的，Tfr1 + Twait1 =Tfr2 + Twait2 = TfrN + TwaitN，并且等于脉冲周期（Tp）；（e）监视用于每个传感器的帧同步信号（FENN）和对应的照明脉冲；（f）从监视步骤获得FENN和FENN+1之间的偏移周期（TdN和TdN+1），所述偏移周期在照明脉冲的负边沿和帧同步信号的负边沿之间；（g）将TwaitN调整为TwaitNR，其中TwaitNR = TwaitN + TdN，所述TdN在监视步骤中被确定以用于下一帧捕获；以及（h）将FENN的负边沿与对应的照明脉冲对齐。
在另一个示例性实施例中，所述方法进一步包括以下步骤：（i）利用有效积分时间来将传感器图像捕获进行积分。
在另一个示例性实施例中，所述方法进一步包括以下步骤：根据所述脉冲宽度（Wp）来限制所述有效积分时间。
在方法的另一个示例性实施例中，在TintN > Wp的基础上，所述有效积分时间是Wp，TintN是由传感器N设定的用于曝光的像素积分时间。
在方法的另一个示例性实施例中，在TintN < Wp的基础上，所述有效积分时间是TintN，其中TintN是由传感器N设定的用于曝光的像素积分时间。
在方法的另一个示例性实施例中，所述照明脉冲频率是对应传感器的帧速率的两倍。
在方法的另一个示例性实施例中，所述照明脉冲频率与对应传感器的帧速率相同。
在方法的另一个示例性实施例中，N个传感器中的每个被对应CPU控制。所述监视步骤由与生成FENN的图像传感器相对应的CPU来实现。
在又一个示例性实施例中，所述方法进一步包括以下步骤：（j）由所述照明控制块来将所述脉冲周期（Tp）和有效脉冲宽度（Wp）传送到对应的CPU。
在方法的另一个示例性实施例中，所述获得、调整和对齐步骤由对应的CPU来实现。
上述说明性概要以及本发明的其他示例性目的和/或优点，以及对其进行实现的方式，在以下详细描述及其附图内被进一步解释。
附图说明
图1示意性描绘了根据本发明的示例性实施例的系统的框图。
图2以流程图示意性描绘了根据本发明的示例性实施例的系统的部件的功能。
图3示意性描绘了用于本发明的示例性实施例中的系统的信号流。
图4是图示了根据本发明的示例性实施例的用于同步多传感器成像器中的有效照明脉冲的方法的流程图。
具体实施方式
本发明涵盖了一种用于同步多传感器成像器中的照明定时的系统。
在图1中所描绘的示例性实施例中，系统（200）包括照明控制块（210）、图像传感器（222、232和234）和CPU（220和230）。所图示的系统（200）描绘了仅2个CPU（220和230）以及仅三个成像传感器（222、232和234），然而更多的成像传感器和对应的CPU是可能的。根据本发明，以及图中所描绘的，每个CPU控制一个或者两个成像传感器。“X”标号标识了CPU。“N”标号标识了成像传感器，以及具有“N”下标的脉冲和信号与具有相同的“N”标号的成像传感器相对应。
照明控制块（210）被通信地链接到CPU（220和230）。照明控制块（210）可以是中央处理单元（CPU）、复杂可编程逻辑器件（CPLD）、现场可编程门阵列（FPGA），等等。
成像传感器（222、232和234）可以是Jade传感器；即，成像软件是基于Java代理开发框架的。在替代方式中，传感器可以是全局快门传感器。
现在参照图2，图1的系统（200）被图示为示出照明控制块（210）和CPU（220和230）的功能。在功能（213和214）中生成用于每个传感器的照明脉冲的照明控制块（210）首先在功能（211）中设定照明脉冲周期（Tp）和有效脉冲宽度（Wp）。照明控制块（210）将Tp和Wp设定为对于每个照明脉冲而言是相同的。照明控制块（210）在功能（212）中将关于照明Tp和Wp的信息传送给CPU（220和230）。
CPU（220和230）控制传感器（分别为222、232和234）并且迫使所述传感器在步骤（240a、240b、240c）中初始化图像捕获。CPU还均被配置成在图像捕获的初始化期间确保捕获帧的时间（Tfr）加上后续图像捕获之间的时间间隔（Twait）对于每个传感器而言是相同的并且等于由照明控制块（210）所传送的照明脉冲周期（Tp）。因此，Tfr1 + Twait1 = Tfr2 +Twait2 = TfrN + TwaitN = Tp，或者在如图2中所示的当前实施例中，如功能（241a、241b和241c）那样，Tfr1 + Twait1 = Tp，Tfr2 + Twait2 = Tp，以及Tfr3 + Twait3 = Tp。
CPU（220和230）被配置成监视用于在特定CPU的控制下的图像传感器的帧同步信号（FENN）和对应的照明脉冲。例如在图中，CPU1在功能（242a）中监视帧同步信号（FEN1）和照明脉冲1。CPU2（230）在功能（242b）中监视帧同步信号（FEN2）和照明脉冲2。因为CPU2（230）控制传感器2（232）和传感器3（234），所以CPU2（230）还在功能（242c）中监视帧同步信号（FEN3）和照明脉冲3。
以类似的方式，CPU1(220)和CPU2(230)在功能（243a、243b、243c）中计算偏移周期（分别为TdN、TdN+1和TdN+2）。所述偏移周期处于对应照明脉冲的负边沿和与N个图像传感器中的每个相对应的帧同步信号的负边沿之间。例如，偏移周期Td1处于照明脉冲1的负边沿和FEN1的负边沿之间。通常，脉冲的负边沿被认为是方波信号的高到低的转变。
在功能244a、224b和244c中，CPU（220和230）被配置成调整图像捕获之间的时间间隔或TwaitN。因此TwaitN被改变为TwaitNR，其中TwaitNR = TwaitN + TdN，即，图像捕获之间的先前间隔加上用于给定传感器的偏移周期。因此，对于传感器1（222），Twait1被调整为Twait1R，其是Twait1 + Td1。CPU（220和230）基于计算偏移周期TdN来做出对Twait的这种调整。
在功能245a、245b和245c中，CPU（220和230）被配置成将FENN的负边沿和对应的照明脉冲对齐。例如，CPU1（220）被配置成将FEN1的负边沿和照明脉冲1对齐。
现在参照图3，以相互比较来示出用于仅传感器1和2（222和232）的照明脉冲和帧同步信号。结合图1和2来讨论图3。
有效照明脉冲（500）被示为具有脉冲周期Tp（501）和脉冲宽度Wp（502）。
FEN1（300）具有偏移周期Td1（301），而FEN2（400）具有偏移周期Td2（401）。注意到的是，偏移周期TdN确保照明脉冲（500）不对Tfr1（303）和Tfr2（403）（帧捕获周期）的相同部分进行照明。同时，帧捕获之间的间隔（TwaitN）应当对于每个传感器而言是相同的。这样在图3中，可以看到，在与彼此偏移的同时，Twait1 (302) + Tfr1 (303) = Twait2 (402) + Tfr2 (403)。
还可以从图3中的信号流看到的是，帧捕获之间的新间隔TwaitNR等于TwaitN + TdN。尤其是Twait1R (304) = Twait1 (302) + Td1 (301)以及Twait1R (404) = Twait2 (402) + Td2(401)。
在图3中还示出的是像素积分时间：用于传感器1（222）的Tint1(305)和用于传感器2（232）的Tint2。当像素积分时间TintN<Wp (502)(照明脉冲宽度)时，用于每个传感器的有效积分时间可以等于像素积分时间TintN。替代地，当像素积分时间TintN大于或等于照明脉冲宽度Wp(502)时，有效积分时间可以等于照明脉冲宽度Wp(502)。
在图3中，照明脉冲(500)具有与传感器1(222)和传感器2(232)的帧速率相等的频率。替代地，照明脉冲（500）可以具有是传感器（222和232）的帧速率的两倍的频率（未在图中示出）。
本发明还涵盖了一种用于同步多传感器成像器中的有效照明脉冲的方法。将结合图1、2和3中图示的系统来描述该方法。
参照图4，在示例性实施例中，所述方法包括以下步骤：（601）从照明控制块提供用于N个传感器中的每个的照明脉冲；（602）将N个照明脉冲中的每个设定为具有相同的脉冲周期（Tp）和有效脉冲宽度（Wp）；（603）将用于N个照明脉冲中的每个的有效宽度脉冲设定为具有用于N个图像传感器中的每个的最大曝光时间；（604）在图像捕获的初始化期间确保捕获帧的时间（Tfr）加上后续图像捕获之间的时间间隔（Twait）对于每个传感器而言是相同的，Tfr1 + Twait1 = Tfr2 + Twait2 = TfrN + TwaitN，并且等于脉冲周期（Tp）；（605）监视用于每个传感器的帧同步信号（FENN）和对应的照明脉冲；（606）从监视步骤获得FENN和FENN+1之间的偏移周期（TdN和TdN+1），所述偏移周期在照明脉冲的负边沿和帧同步信号的负边沿之间；（607）将TwaitN调整为TwaitNR，其中TwaitNR = TwaitN + TdN，所述TdN在监视步骤中被确定以用于下一帧捕获；以及（608）将FENN的负边沿与对应的照明脉冲对齐。
该方法可以进一步包括以下步骤：（609）在所述（602）设定步骤之后，由所述照明控制块来将所述脉冲周期（Tp）和有效脉冲宽度（Wp）传送到对应的CPU。
该方法而可以进一步包括以下步骤：（610）利用有效积分时间来将传感器图像捕获进行积分，以及（611）根据所述脉冲宽度（Wp）来限制所述有效积分时间。
对于步骤（611），在像素积分时间TintN大于或等于Wp的基础上，所述有效积分时间被设定为照明脉冲宽度Wp。TintN由对应传感器N来设定。
对于步骤（611），在像素积分时间小于照明脉冲宽度Wp的基础上，所述有效积分时间被设定为像素积分时间TintN。
在该方法中，N个传感器中的每个被对应CPU控制。所述监视步骤（605）由与生成FENN的图像传感器相对应的CPU来实现。所述获得（606）、调整（607）和对齐（608）步骤由所述对应CPU来实现。
Figure 21644DEST_PATH_IMAGE001
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美国专利申请公开No. 2015/0009610；
美国专利申请公开No. 2015/0014416；
美国专利申请公开No. 2015/0021397；
美国专利申请公开No. 2015/0028102；
美国专利申请公开No. 2015/0028103；
美国专利申请公开No. 2015/0028104；
美国专利申请公开No. 2015/0029002；
美国专利申请公开No. 2015/0032709；
美国专利申请公开No. 2015/0039309；
美国专利申请公开No. 2015/0039878；
美国专利申请公开No. 2015/0040378；
美国专利申请公开No. 2015/0048168；
美国专利申请公开No. 2015/0049347；
美国专利申请公开No. 2015/0051992；
美国专利申请公开No. 2015/0053766；
美国专利申请公开No. 2015/0053768；
美国专利申请公开No. 2015/0053769；
美国专利申请公开No. 2015/0060544；
美国专利申请公开No. 2015/0062366；
美国专利申请公开No. 2015/0063215；
美国专利申请公开No. 2015/0063676；
美国专利申请公开No. 2015/0069130；
美国专利申请公开No. 2015/0071819；
美国专利申请公开No. 2015/0083800；
美国专利申请公开No. 2015/0086114；
美国专利申请公开No. 2015/0088522；
美国专利申请公开No. 2015/0096872；
美国专利申请公开No. 2015/0099557；
美国专利申请公开No. 2015/0100196；
美国专利申请公开No. 2015/0102109；
美国专利申请公开No. 2015/0115035；
美国专利申请公开No. 2015/0127791；
美国专利申请公开No. 2015/0128116；
美国专利申请公开No. 2015/0129659；
美国专利申请公开No. 2015/0133047；
美国专利申请公开No. 2015/0134470；
美国专利申请公开No. 2015/0136851；
美国专利申请公开No. 2015/0136854；
美国专利申请公开No. 2015/0142492；
美国专利申请公开No. 2015/0144692；
美国专利申请公开No. 2015/0144698；
美国专利申请公开No. 2015/0144701；
美国专利申请公开No. 2015/0149946；
美国专利申请公开No. 2015/0161429；
美国专利申请公开No. 2015/0169925；
美国专利申请公开No. 2015/0169929；
美国专利申请公开No. 2015/0178523；
美国专利申请公开No. 2015/0178534；
美国专利申请公开No. 2015/0178535；
美国专利申请公开No. 2015/0178536；
美国专利申请公开No. 2015/0178537；
美国专利申请公开No. 2015/0181093；
美国专利申请公开No. 2015/0181109；
2012年2月7日提交的针对“a Laser Scanning Module Employing anElastomeric U-Hinge Based Laser Scanning Assembly”的美国专利申请No. 13/367,978 (Feng等人)；
2013年6月19日提交的针对“an Electronic Device”的美国专利申请No. 29/458,405 (Fitch等人)；
2013年7月2日提交的针对“an Electronic Device Enclosure”的美国专利申请No. 29/459,620 (London等人)；
2013年9月26日提交的针对“an Electronic Device Case”的美国专利申请No.29/468,118 (Oberpriller等人)；
2014年1月8日提交的针对“Indicia-reader Having Unitary ConstructionScanner”的美国专利申请No. 14/150,393 (Colavito等人)；
2014年3月7日提交的针对“Indicia Reader for Size-Limited Applications”的美国专利申请No. 14/200,405 (Feng等人)；
2014年4月1日提交的针对“Hand-Mounted Indicia-Reading Device withFinger Motion Triggering”的美国专利申请No. 14/231,898 (Van Horn等人)；
2014年4月2日提交的针对“an Imaging Terminal”的美国专利申请No. 29/486,759 (Oberpriller等人)；
2014年4月21日提交的针对“Docking System and Method Using Near FieldCommunication”的美国专利申请No. 14/257,364 (Showering)；
2014年4月29日提交的针对“Autofocus Lens System for Indicia Readers”的美国专利申请No. 14/264,173 (Ackley等人)；
2014年5月14日提交的针对“MULTIPURPOSE OPTICAL READER”的美国专利申请No.14/277,337 (Jovanovski等人)；
2014年5月21日提交的针对“TERMINAL HAVING ILLUMINATION AND FOCUSCONTROL”的美国专利申请No. 14/283,282 (Liu等人)；
2014年7月10日提交的针对“a MOBILE-PHONE ADAPTER FOR ELECTRONICTRANSACTIONS”的美国专利申请No. 14/327,827 (Hejl)；
2014年7月18日提交的针对“a SYSTEM AND METHOD FOR INDICIA VERIFICATION”的美国专利申请No. 14/334,934 (Hejl)；
2014年7月24日提交的针对“LASER SCANNING CODE SYMBOL READING SYSTEM”的美国专利申请No. 14/339,708 (Xian等人)；
2014年7月25日提交的针对“an AXIALLY REINFORCED FLEXIBLE SCAN ELEMENT”的美国专利申请No. 14/340,627 (Rueblinger等人)；
2014年7月30日提交的针对“MULTIFUNCTION POINT OF SALE APPARATUS WITHOPTICAL SIGNATURE CAPTURE”的美国专利申请No. 14/446,391 (Good等人)；
2014年8月6日提交的针对“INTERACTIVE INDICIA READER”的美国专利申请No.14/452,697 (Todeschini)；
2014年8月6日提交的针对“DIMENSIONING SYSTEM WITH GUIDED ALIGNMENT”的美国专利申请No. 14/453,019 (Li等人)；
2014年8月19日提交的针对“MOBILE COMPUTING DEVICE WITH DATA COGNITIONSOFTWARE”的美国专利申请No. 14/462,801 (Todeschini等人)；
2014年9月10日提交的针对“VARIABLE DEPTH OF FIELD BARCODE SCANNER”的美国专利申请No. 14/483,056 (McCloskey等人)；
2014年10月14日提交的针对“IDENTIFYING INVENTORY ITEMS IN A STORAGEFACILITY”的美国专利申请No. 14/513,808 (Singel等人)；
2014年10月21日提交的针对“HANDHELD DIMENSIONING SYSTEM WITH FEEDBACK”的美国专利申请No. 14/519,195 (Laffargue等人)；
2014年10月21日提交的针对“DIMENSIONING SYSTEM WITH MULTIPATHINTERFERENCE MITIGATION”的美国专利申请No. 14/519,179 (Thuries等人)；
2014年10月21日提交的针对“SYSTEM AND METHOD FOR DIMENSIONING”的美国专利申请No. 14/519,211 (Ackley等人)；
2014年10月21日提交的针对“HANDHELD DIMENSIONER WITH DATA-QUALITYINDICATION”的美国专利申请No. 14/519,233 (Laffargue等人)；
2014年10月21日提交的针对“HANDHELD DIMENSIONING SYSTEM WITHMEASUREMENT-CONFORMANCE FEEDBACK”的美国专利申请No. 14/519,249 (Ackley等人)；
2014年10月29日提交的针对“METHOD AND SYSTEM FOR RECOGNIZING SPEECHUSING WILDCARDS IN AN EXPECTED RESPONSE”的美国专利申请No. 14/527,191 (Braho等人)；
2014年10月31日提交的针对“ADAPTABLE INTERFACE FOR A MOBILE COMPUTINGDEVICE”的美国专利申请No. 14/529,563 (Schoon等人)；
2014年10月31日提交的针对“BARCODE READER WITH SECURITY FEATURES”的美国专利申请No. 14/529,857 (Todeschini等人)；
2014年11月3日提交的针对“PORTABLE ELECTRONIC DEVICES HAVING A SEPARATELOCATION TRIGGER UNIT FOR USE IN CONTROLLING AN APPLICATION UNIT”的美国专利申请No. 14/398,542 (Bian等人)；
2014年11月3日提交的针对“DIRECTING AN INSPECTOR THROUGH AN INSPECTION”的美国专利申请No. 14/531,154 (Miller等人)；
2014年11月5日提交的针对“BARCODE SCANNING SYSTEM USING WEARABLE DEVICEWITH EMBEDDED CAMERA”的美国专利申请No. 14/533,319 (Todeschini)；
2014年11月7日提交的针对“CONCATENATED EXPECTED RESPONSES FOR SPEECHRECOGNITION”的美国专利申请No. 14/535,764 (Braho等人)；
2014年12月12日提交的针对“AUTO-CONTRAST VIEWFINDER FOR AN INDICIAREADER”的美国专利申请No. 14/568,305 (Todeschini)；
2014年12月17日提交的针对“DYNAMIC DIAGNOSTIC INDICATOR GENERATION”的美国专利申请No. 14/573,022 (Goldsmith)；
2014年12月22日提交的针对“SAFETY SYSTEM AND METHOD”的美国专利申请No.14/578,627 (Ackley等人)；
2014年12月23日提交的针对“MEDIA GATE FOR THERMAL TRANSFER PRINTERS”的美国专利申请No. 14/580,262 (Bowles)；
2015年1月6日提交的针对“SHELVING AND PACKAGE LOCATING SYSTEMS FORDELIVERY VEHICLES”的美国专利申请No. 14/590,024 (Payne)；
2015年1月14日提交的针对“SYSTEM AND METHOD FOR DETECTING BARCODEPRINTING ERRORS”的美国专利申请No. 14/596,757 (Ackley)；
2015年1月21日提交的针对“OPTICAL READING APPARATUS HAVING VARIABLESETTINGS”的美国专利申请No. 14/416,147 (Chen等人)；
2015年2月5日提交的针对“DEVICE FOR SUPPORTING AN ELECTRONIC TOOL ON AUSER’S HAND”的美国专利申请No. 14/614,706 (Oberpriller等人)；
2015年2月5日提交的针对“CARGO APPORTIONMENT TECHNIQUES”的美国专利申请No. 14/614,796 (Morton等人)；
2015年2月6日提交的针对“TABLE COMPUTER”的美国专利申请No. 29/516,892(Bidwell等人)；
2015年2月11日提交的针对“METHODS FOR TRAINING A SPEECH RECOGNITIONSYSTEM”的美国专利申请No. 14/619,093 (Pecorari)；
2015年2月23日提交的针对“DEVICE, SYSTEM, AND METHOD FOR DETERMININGTHE STATUS OF CHECKOUT LANES”的美国专利申请No. 14/628,708 (Todeschini)；
2015年2月25日提交的针对“TERMINAL INCLUDING IMAGING ASSEMBLY”的美国专利申请No. 14/630,841 (Gomez等人)；
2015年3月2日提交的针对“SYSTEM AND METHOD FOR RELIABLE STORE-AND-FORWARD DATA HANDLING BY ENCODED INFORMATION READING TERMINALS”的美国专利申请No. 14/635,346 (Sevier)；
2015年3月2日提交的针对“SCANNER”的美国专利申请No. 29/519,017 (Zhou等人)；
2015年3月9日提交的针对“DESIGN PATTERN FOR SECURE STORE”的美国专利申请No. 14/405,278 (Zhu等人)；
2015年3月18日提交的针对“DECODABLE INDICIA READING TERMINAL WITHCOMBINED ILLUMINATION”的美国专利申请No. 14/660,970 (Kearney等人)；
2015年3月18日提交的针对“REPROGRAMMING SYSTEM AND METHOD FOR DEVICESINCLUDING PROGRAMMING SYMBOL”的美国专利申请No. 14/661,013 (Soule等人)；
2015年3月19日提交的针对“MULTIFUNCTION POINT OF SALE SYSTEM”的美国专利申请No. 14/662,922 (Van Horn等人)；
2015年3月20日提交的针对“VEHICLE MOUNT COMPUTER WITH CONFIGURABLEIGNITION SWITCH BEHAVIOR”的美国专利申请No. 14/663,638 (Davis等人)；
2015年3月20日提交的针对“METHOD AND APPLICATION FOR SCANNING A BARCODEWITH A SMART DEVICE WHILE CONTINUOUSLY RUNNING AND DISPLAYING AN APPLICATIONON THE SMART DEVICE DISPLAY”的美国专利申请No. 14/664,063 (Todeschini)；
2015年3月26日提交的针对“TRANSFORMING COMPONENTS OF A WEB PAGE TOVOICE PROMPTS”的美国专利申请No. 14/669,280 (Funyak等人)；
2015年3月31日提交的针对“AIMER FOR BARCODE SCANNING”的美国专利申请No.14/674,329 (Bidwell)；
2015年4月1日提交的针对“INDICIA READER”的美国专利申请No. 14/676,109(Huck)；
2015年4月1日提交的针对“DEVICE MANAGEMENT PROXY FOR SECURE DEVICES”的美国专利申请No. 14/676,327 (Yeakley等人)；
2015年4月2日提交的针对“NAVIGATION SYSTEM CONFIGURED TO INTEGRATEMOTION SENSING DEVICE INPUTS”的美国专利申请No. 14/676,898 (Showering)；
2015年4月6日提交的针对“DIMENSIONING SYSTEM CALIBRATION SYSTEMS ANDMETHODS”的美国专利申请No. 14/679,275 (Laffargue等人)；
2015年4月7日提交的针对“HANDLE FOR A TABLET COMPUTER”的美国专利申请No.29/523,098 (Bidwell等人)；
2015年4月9日提交的针对“SYSTEM AND METHOD FOR POWER MANAGEMENT OFMOBILE DEVICES”的美国专利申请No. 14/682,615 (Murawski等人)；
2015年4月15日提交的针对“MULTIPLE PLATFORM SUPPORT SYSTEM AND METHOD”的美国专利申请No. 14/686,822 (Qu等人)；
2015年4月15日提交的针对“SYSTEM FOR COMMUNICATION VIA A PERIPHERALHUB”的美国专利申请No. 14/687,289 (Kohtz等人)；
2015年4月17日提交的针对“SCANNER”的美国专利申请No. 29/524,186 (Zhou等人)；
2015年4月24日提交的针对“MEDICATION MANAGEMENT SYSTEM”的美国专利申请No. 14/695,364 (Sewell等人)；
2015年4月24日提交的针对“SECURE UNATTENDED NETWORK AUTHENTICATION”的美国专利申请No. 14/695,923 (Kubler等人)；
2015年4月27日提交的针对“TABLET COMPUTER WITH REMOVABLE SCANNINGDEVICE”的美国专利申请No. 29/525,068 (Schulte等人)；
2015年4月29日提交的针对“SYMBOL READING SYSTEM HAVING PREDICTIVEDIAGNOSTICS”的美国专利申请No. 14/699,436 (Nahill等人)；
2015年5月1日提交的针对“SYSTEM AND METHOD FOR REGULATING BARCODE DATAINJECTION INTO A RUNNING APPLICATION ON A SMART DEVICE”的美国专利申请No. 14/702,110 (Todeschini等人)；
2015年5月4日提交的针对“TRACKING BATTERY CONDITIONS”的美国专利申请No.14/702,979 (Young等人)；
2015年5月5日提交的针对“INTERMEDIATE LINEAR POSITIONING”的美国专利申请No. 14/704,050 (Charpentier等人)；
2015年5月6日提交的针对“HANDS-FREE HUMAN MACHINE INTERFACE RESPONSIVETO A DRIVER OF A VEHICLE”的美国专利申请No. 14/705,012 (Fitch等人)；
2015年5月6日提交的针对“METHOD AND SYSTEM TO PROTECT SOFTWARE-BASEDNETWORK-CONNECTED DEVICES FROM ADVANCED PERSISTENT THREAT”的美国专利申请No.14/705,407 (Hussey等人)；
2015年5月8日提交的针对“SYSTEM AND METHOD FOR DISPLAY OF INFORMATIONUSING A VEHICLE-MOUNT COMPUTER”的美国专利申请No. 14/707,037 (Chamberlin)；
2015年5月8日提交的针对“APPLICATION INDEPENDENT DEX/UCS INTERFACE”的美国专利申请No. 14/707,123 (Pape)；
2015年5月8日提交的针对“METHOD AND APPARATUS FOR READING OPTICALINDICIA USING A PLURALITY OF DATA SOURCES”的美国专利申请No. 14/707,492 (Smith等人)；
2015年5月13日提交的针对“PRE-PAID USAGE SYSTEM FOR ENCODED INFORMATIONREADING TERMINALS”的美国专利申请No. 14/710,666 (Smith)；
2015年5月14日提交的针对“CHARGING BASE”的美国专利申请No. 29/526,918(Fitch等人)；
2015年5月19日提交的针对“AUGUMENTED REALITY ENABLED HAZARD DISPLAY”的美国专利申请No. 14/715,672 (Venkatesha等人)；
2015年5月19日提交的针对“EVALUATING IMAGE VALUES”的美国专利申请No. 14/715,916 (Ackley)；
2015年5月27日提交的针对“INTERACTIVE USER INTERFACE FOR CAPTURING ADOCUMENT IN AN IMAGE SIGNAL”的美国专利申请No. 14/722,608 (Showering等人)；
2015年5月27日提交的针对“IN-COUNTER BARCODE SCANNER”的美国专利申请No.29/528,165 (Oberpriller等人)；
2015年5月28日提交的针对“ELECTRONIC DEVICE WITH WIRELESS PATHSELECTION CAPABILITY”的美国专利申请No. 14/724,134 (Wang等人)；
2015年5月29日提交的针对“METHOD OF PROGRAMMING THE DEFAULT CABLEINTERFACE SOFTWARE IN AN INDICIA READING DEVICE”的美国专利申请No. 14/724,849(Barten)；
2015年5月29日提交的针对“IMAGING APPARATUS HAVING IMAGING ASSEMBLY”的美国专利申请No. 14/724,908 (Barber等人)；
针对“APPARATUS AND METHODS FOR MONITORING ONE OR MORE PORTABLE DATATERMINALS”的美国专利申请No. 14/725,352 (Caballero等人)；
2015年5月29日提交的针对“ELECTRONIC DEVICE”的美国专利申请No. 29/528,590 (Fitch等人)；
2015年6月2日提交的针对“MOBILE COMPUTER HOUSING”的美国专利申请No. 29/528,890 (Fitch等人)；
2015年6月2日提交的针对“DEVICE MANAGEMENT USING VIRTUAL INTERFACESCROSS-REFERENCE TO RELATED APPLICATIONS”的美国专利申请No. 14/728,397(Caballero)；
2015年6月8日提交的针对“DATA COLLECTION MODULE AND SYSTEM”的美国专利申请No. 14/732,870 (Powilleit)；
2015年6月8日提交的针对“INDICIA READING DEVICE”的美国专利申请No. 29/529,441 (Zhou等人)；
2015年6月10日提交的针对“INDICIA-READING SYSTEMS HAVING AN INTERFACEWITH A USER'S NERVOUS SYSTEM”的美国专利申请No. 14/735,717 (Todeschini)；
2015年6月12日提交的针对“METHOD OF AND SYSTEM FOR DETECTING OBJECTWEIGHING INTERFERENCES”的美国专利申请No. 14/738,038 (Amundsen等人)；
2015年6月16日提交的针对“TACTILE SWITCH FOR A MOBILE ELECTRONICDEVICE”的美国专利申请No. 14/740,320 (Bandringa)；
2015年6月16日提交的针对“CALIBRATING A VOLUME DIMENSIONER”的美国专利申请No. 14/740,373 (Ackley等人)；
2015年6月18日提交的针对“INDICIA READING SYSTEM EMPLOYING DIGITAL GAINCONTROL”的美国专利申请No. 14/742,818 (Xian等人)；
2015年6月18日提交的针对“WIRELESS MESH POINT PORTABLE DATA TERMINAL”的美国专利申请No. 14/743,257 (Wang等人)；
2015年6月18日提交的针对“CYCLONE”的美国专利申请No. 29/530,600 (Vargo等人)；
2015年6月19日提交的针对“IMAGING APPARATUS COMPRISING IMAGE SENSORARRAY HAVING SHARED GLOBAL SHUTTER CIRCUITRY”的美国专利申请No. 14/744,633(Wang)；
2015年6月19日提交的针对“CLOUD-BASED SYSTEM FOR READING OF DECODABLEINDICIA”的美国专利申请No. 14/744,836 (Todeschini等人)；
2015年6月19日提交的针对“SELECTIVE OUTPUT OF DECODED MESSAGE DATA”的美国专利申请No. 14/745,006 (Todeschini等人)；
2015年6月23日提交的针对“OPTICAL PATTERN PROJECTOR”的美国专利申请No.14/747,197 (Thuries等人)；
2015年6月23日提交的针对“DUAL-PROJECTOR THREE-DIMENSIONAL SCANNER”的美国专利申请No. 14/747,490 (Jovanovski等人)；以及
2015年6月24日提交的针对“CORDLESS INDICIA READER WITH A MULTIFUNCTIONCOIL FOR WIRELESS CHARGING AND EAS DEACTIVATION”的美国专利申请No. 14/748,446(Xie等人)。
Figure 801381DEST_PATH_IMAGE002
在说明书和/或附图中，已经公开了发明的典型实施例。本发明不限于这种示例性实施例。术语“和/或”的使用包括所关联的列出术语中的一个或多个的任何和所有组合。附图是示意性表示并且因此不必按比例绘制。除非另行指出，否则具体术语已经以通用和描述性意义来使用并且不是用于限制的目的。

Claims (15)

1.一种用于同步多传感器成像器中的照明定时的系统，包括：
具有有效脉冲照明的数量为N的图像传感器，N是> 2的自然数，每个传感器被配置成生成用于图像捕获的帧同步信号FENN，其中下标N指示与所述帧同步信号相对应的图像传感器；
至少2个CPU，所述CPU中的每个控制所述数量为N的图像传感器中的至少1个；
与所述CPU中的每个通信链接的照明控制块；
所述照明控制块被配置成生成用于N个图像传感器中的每个的照明脉冲，所述用于N个图像传感器中的每个的照明脉冲被设定为具有照明脉冲周期Tp和有效脉冲宽度Wp，用于每个照明脉冲的所述有效脉冲宽度被设定为具有用于N个图像传感器中的每个的最大曝光时间，其中用于所述照明脉冲的所述照明脉冲周期Tp和所述有效脉冲宽度Wp对于N个图像传感器中的每个是相同的；
所述照明控制块被配置成将用于所述照明脉冲的照明脉冲周期Tp和有效脉冲宽度Wp传送到所述CPU中的每个；
所述CPU中的每个被配置成在图像捕获的初始化期间确保捕获帧的时间Tfr加上后续图像捕获之间的时间间隔Twait等于所述照明脉冲周期Tp，并且对于每个传感器而言是相同的，Tfr1 + Twait1 = Tfr2 + Twait2= …… = TfrN + TwaitN；
所述CPU中的每个被配置成监视用于在CPU的控制下的图像传感器的帧同步信号FENN的负边沿和对应的照明脉冲的负边沿，所述帧同步信号的负边沿是Twait负边沿；
所述CPU中的每个被进一步配置成计算偏移周期TdN和TdN+1，所述偏移周期处于所述照明脉冲的负边沿和与N个图像传感器中的每个相对应的帧同步信号的负边沿之间；
所述CPU中的每个被进一步配置成将所述TwaitN调整为TwaitNR，其中TwaitNR = TwaitN +TdN；以及
所述CPU中的每个被进一步配置成将Twait的负边沿与对应的照明脉冲的负边沿对齐。
2.如权利要求1所述的系统，其中所述CPU中的每个在一对一的基础上与所述数量为N的传感器相对应。
3.如权利要求1所述的系统，其中所述CPU中的每个控制所述数量为N的传感器中的2个。
4.如权利要求1所述的系统，其中所述照明控制块是从CPU、CPLD和FPGA中选择的。
5.如权利要求1所述的系统，其中所述CPU中的每个被配置成利用有效积分时间来将对应图像传感器图像捕获进行积分。
6.如权利要求5所述的系统，其中所述CPU中的每个被配置成根据所述脉冲宽度Wp来限制所述对应图像传感器的有效积分时间。
7.如权利要求5所述的系统，其中，在TintN> Wp的基础上，所述有效积分时间是Wp，TintN是由图像传感器N设定的用于曝光的像素积分时间。
8.如权利要求5所述的系统，其中，在TintN < Wp的基础上，所述有效积分时间是TintN，其中TintN是由传感器N设定的用于曝光的像素积分时间。
9.如权利要求1所述的系统，其中，每个照明脉冲具有与对应图像传感器的帧速率相等的频率。
10.如权利要求1所述的系统，其中，每个照明脉冲具有与对应图像传感器的帧速率的两倍相等的频率。
11.一种用于同步具有数量为N的传感器的多传感器成像器中的有效照明脉冲的方法，其中N是大于1的非零自然数以及与周期T和帧同步信号FEN相结合的下标N与对应传感器相关，所述方法包括以下步骤：
a) 从照明控制块提供用于N个传感器中的每个的照明脉冲；
b) 将N个照明脉冲中的每个设定为具有照明脉冲周期Tp和有效脉冲宽度Wp，其中用于所述照明脉冲的所述照明脉冲周期Tp和所述有效脉冲宽度Wp对于N个图像传感器中的每个是相同的；
c) 将用于N个照明脉冲中的每个的有效脉冲宽度设定为具有用于N个图像传感器中的每个的最大曝光时间；
d) 在图像捕获的初始化期间确保捕获帧的时间Tfr加上后续图像捕获之间的时间间隔Twait对于每个传感器而言是相同的，Tfr1 + Twait1 = Tfr2 + Twait2 = …… = TfrN + TwaitN，并且等于所述脉冲周期Tp；
e) 监视用于图像传感器的帧同步信号FENN的负边沿和用于每个传感器的对应的照明脉冲的负边沿，所述帧同步信号的负边沿是Twait负边沿；
f) 从监视步骤获得FENN和FENN+1的偏移周期TdN和TdN+1，所述偏移周期在所述照明脉冲的负边沿和所述帧同步信号的负边沿之间；
g) 将所述TwaitN调整为TwaitNR，其中TwaitNR = TwaitN + TdN，所述TdN在监视步骤中被确定以用于下一帧捕获；以及
h) 将Twait的负边沿与对应的照明脉冲的负边沿对齐。
12.如权利要求11所述的方法，进一步包括以下步骤：利用有效积分时间来将传感器图像捕获进行积分。
13.如权利要求12所述的方法，进一步包括以下步骤：根据所述脉冲宽度Wp来限制所述有效积分时间。
14.如权利要求13所述的方法，其中，在TintN> Wp的基础上，所述有效积分时间是Wp，TintN是由传感器N设定的用于曝光的像素积分时间。
15.如权利要求13所述的方法，其中，在TintN < Wp的基础上，所述有效积分时间是TintN，其中TintN是由传感器N设定的用于曝光的像素积分时间。
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