Rangefinder apparatus
    21.
    发明申请
    Rangefinder apparatus 失效
    测距仪

    公开(公告)号:US20050036128A1

    公开(公告)日:2005-02-17

    申请号:US10911711

    申请日:2004-08-05

    摘要: In a rangefinder, if sensor data initially received by a sensor data storage part from an A/D converter includes data with low contrast, the sensor data storage part receives the sensor data at least one additional time, adds additionally received sensor data to the initially received sensor data, and stores their sum. In accordance with the sum of sensor data stored in the sensor data storage part, a correlation calculation and a rangefinding calculation are carried out, which enables rangefinding with respect to an object having low contrast. Also, the time required for A/D-converting the sensor data again and adding the resulting data to those initially obtained is much shorter than the integration time required for integrating output signals of a pair of line sensors a second time for a region with low luminance and low contrast.

    摘要翻译: 在测距仪中,如果来自A / D转换器的传感器数据存储部分最初接收到的传感器数据包括具有低对比度的数据,则传感器数据存储部分至少接收一个附加时间的传感器数据,将附加接收的传感器数据添加到初始 接收传感器数据,并存储其总和。 根据存储在传感器数据存储部中的传感器数据的和,执行相关计算和测距计算,其能够相对于具有低对比度的对象进行测距。 此外,再次对传感器数据进行A / D转换所需的时间,并将最终得到的数据与最初获得的数据相加的时间要比第二次将低成本区域的一行线传感器的输出信号进行积分所需的积分时间短得多 亮度和低对比度。

    Distance measuring apparatus and camera comprising the apparatus
    23.
    发明授权
    Distance measuring apparatus and camera comprising the apparatus 失效
    包括该装置的距离测量装置和照相机

    公开(公告)号:US06721498B2

    公开(公告)日:2004-04-13

    申请号:US10607522

    申请日:2003-06-27

    申请人: Hideo Yoshida

    发明人: Hideo Yoshida

    IPC分类号: G03B1336

    CPC分类号: G02B7/34

    摘要: A distance measuring apparatus detects the shortest distance measurement value corresponding to the shortest distance among multiple distance measurements, and selects distance measurement values which differ from the shortest distance measurement value by a value less than a threshold value; calculates a first correction value as a mean of differences between the shortest distance measurement value and the distance measurement values selected; detecting the longest distance measurement value corresponding to the longest distance among the distance measurement values selected, and calculates a second correction value as ½ of the difference between the shortest distance measurement value and the longest distance measurement value; and calculates autofocus data by correcting the shortest distance measurement value, adopting a correction value that is the lesser of the first correction value and the second correction value.

    摘要翻译: 距离测量装置检测与多个距离测量中的最短距离对应的最短距离测量值,并且选择与最短距离测量值不同的距离测量值小于阈值的值; 计算第一校正值作为所选择的最短距离测量值和距离测量值之间的差的平均值; 检测所选择的距离测量值中与最长距离对应的最长距离测量值,并将第二校正值计算为最短距离测量值和最长距离测量值之间的差的1/2; 并通过校正最短距离测量值来计算自动聚焦数据,采用第一校正值和第二校正值较小的校正值。

    Distance measuring apparatus
    24.
    发明授权
    Distance measuring apparatus 失效
    距离测量仪

    公开(公告)号:US06711350B2

    公开(公告)日:2004-03-23

    申请号:US10310771

    申请日:2002-12-06

    IPC分类号: G03B1336

    CPC分类号: G02B7/34

    摘要: The sensor sensitivity and the method of setting the peak selected area of the AF sensor are changed according to the luminance level of the distance measurement object. The distance measuring apparatus uses a passive AF sensor to determine the distance of a distance measuring object by sensor data obtained from the AF sensor, wherein: if the distance measurement object has high luminance, the sensor sensitivity is set at low sensitivity, the distance measurement area is divided into three areas, and sensor data is acquired for each area as a peak selected area of the AF sensor; if the distance measurement object has moderate luminance, the sensor sensitivity is set at low sensitivity, and sensor data is acquired with the entire area of the distance measurement area being the peak selected area of the AF sensor; and if the distance measurement object has low luminance, the sensor sensitivity is set at high sensitivity, and sensor data is acquired with the entire area of the distance measurement area being the peak selected area, whereby proper sensor data is acquired to carry out distance measurement suitably and reliably.

    摘要翻译: 传感器灵敏度和设置AF传感器的峰值选择区域的方法根据距离测量对象的亮度水平而改变。 距离测量装置使用无源AF传感器,通过从AF传感器获得的传感器数据来确定距离测量对象的距离,其中:如果距离测量对象具有高亮度,则传感器灵敏度被设置为低灵敏度,距离测量 区域分为三个区域,并且为每个区域获取传感器数据作为AF传感器的峰值选择区域; 如果距离测量对象具有中等亮度,则传感器灵敏度被设置为低灵敏度,并且在距离测量区域的整个区域是AF传感器的峰值选择区域的情况下获取传感器数据; 如果距离测量对象的亮度低,则传感器灵敏度被设置为高灵敏度,并且以距离测量区域的整个区域为峰值选择区域获取传感器数据,由此获取适当的传感器数据以执行距离测量 适当可靠。

    Distance measuring apparatus
    25.
    发明授权
    Distance measuring apparatus 失效
    距离测量仪

    公开(公告)号:US06701074B2

    公开(公告)日:2004-03-02

    申请号:US10314284

    申请日:2002-12-09

    IPC分类号: G03B1336

    CPC分类号: G02B7/34

    摘要: A correlation value calculation is performed by using AF data arranged at predetermined intervals in the AF data in a pair of window ranges, so that a frequency of calculation can be reduced. On the other hand, a correlation value calculation is performed by using all the AF data in the pair of window ranges only in predetermined ranges before and after the shift amount of the pair of window ranges when the highest correlation value in the correlation values is obtained, thereby suppressing a reduction in measurement precision. For example, in a pair of the AF data obtained from a pair of window ranges, the correlation value calculation is performed by using every third piece of the AF data. Then, the correlation value calculation (normal calculation) is performed by using all the AF data in the pair of window ranges in predetermined ranges (range for re-performing the calculation) before and after the shift amount of the pair of window ranges when the highest correlation value is obtained in the correlation values obtained by the former correlation value calculation.

    摘要翻译: 通过使用在一对窗口范围内的AF数据中以预定间隔布置的AF数据来执行相关值计算,从而可以减少计算频率。 另一方面,当获得相关值中的最高相关值时,在一对窗口范围的移位量之前和之后的预定范围内,通过使用该对窗口范围中的所有AF数据来执行相关值计算 从而抑制测量精度的降低。 例如,在从一对窗口范围获得的一对AF数据中,通过使用每隔三分之一的AF数据来进行相关值计算。 然后,通过使用在一对窗口范围的移动量之前和之后的预定范围(重新执行计算的范围)中的一对窗口范围中的所有AF数据来执行相关值计算(正常计算) 在通过前一相关值计算获得的相关值中获得最高相关值。

    Multiple coding method and apparatus, multiple decoding method and apparatus, and information transmission system
    26.
    发明授权
    Multiple coding method and apparatus, multiple decoding method and apparatus, and information transmission system 有权
    多重编码方法和装置,多重解码方法和装置以及信息传输系统

    公开(公告)号:US06658605B1

    公开(公告)日:2003-12-02

    申请号:US09703638

    申请日:2000-11-02

    IPC分类号: G11C2900

    摘要: A multiple coding apparatus comprises a first encoder for encoding a plurality of input sequences in parallel so as to generate a plurality of output coded sequences in parallel while adding an error-correcting bit sequence to each of the plurality of input sequences. An interleaving circuit interleaves the plurality of output coded sequences applied thereto in parallel from the first encoder without having to use any memory. The interleaving circuit permutes the plurality of input sequences on a bit-by-bit or symbol-by-symbol basis so as to generate a plurality of interleaved coded sequences in parallel. A second encoder then encodes the plurality of interleaved coded sequences applied thereto in parallel from the interleaving circuit so as to generate a plurality of output coded sequences in parallel while adding an error-correcting bit sequence to each of the plurality of interleaved coded sequences.

    摘要翻译: 多重编码装置包括:并行地编码多个输入序列的第一编码器,以便并行地产生多个输出编码序列,同时向多个输入序列中的每个输入序列添加纠错位序列。 交织电路将从第一编码器并行地施加到其上的多个输出编码序列进行交织,而不必使用任何存储器。 交织电路逐位或逐符号地排列多个输入序列,以便并行地生成多个交错编码序列。 然后,第二编码器对从交织电路并行施加到其上的多个交错编码序列进行编码,以便并行地产生多个输出编码序列,同时向多个交错编码序列中的每一个添加纠错位序列。

    Rangefinder apparatus and rangefinding light-detecting device
    27.
    发明授权
    Rangefinder apparatus and rangefinding light-detecting device 失效
    测距仪和测距光检测装置

    公开(公告)号:US06341012B1

    公开(公告)日:2002-01-22

    申请号:US09702133

    申请日:2000-10-31

    申请人: Hideo Yoshida

    发明人: Hideo Yoshida

    IPC分类号: G01C300

    CPC分类号: G01C3/08 G02B7/32 G03B13/36

    摘要: A rangefinder apparatus includes infrared light emitting diodes (IREDS) for projecting respective light beams toward a target object; and a position sensitive detector (PSD), disposed at a distance from the IREDS, having a light-detecting region for detecting respective reflected light beams of the light beams projected to the target object, the light-detecting region of the PSD being shaped substantially as a parallelogram with no rectangular corners. Since the light-detecting region of light-detecting means is shaped substantially as a parallelogram with no rectangular corners, the rangefinding accuracy can be improved while the manufacturing cost is restrained from increasing.

    摘要翻译: 测距装置包括用于将各个光束朝向目标物体投射的红外发光二极管(IREDS) 和位于距离IREDS一定距离处的位置敏感检测器(PSD),具有用于检测投影到目标物体的光束的各个反射光束的光检测区域,PSD的光检测区域基本成形 作为没有矩形角的平行四边形。 由于光检测装置的光检测区域基本上形成为没有矩形拐角的平行四边形,所以可以提高测距精度,同时抑制制造成本的增加。

    Distance measurement system
    28.
    发明授权
    Distance measurement system 失效
    距离测量系统

    公开(公告)号:US06292257B1

    公开(公告)日:2001-09-18

    申请号:US09406831

    申请日:1999-09-28

    申请人: Hideo Yoshida

    发明人: Hideo Yoshida

    IPC分类号: G03B1300

    摘要: A distance measurement system for measuring a distance with a little time difference while maintaining high accuracy. An infrared emitting diode (IRED) emits a beam of light toward an object at a distance to be measured and a position sensitive detector (PSD) receives reflected light. Outputs from the PSD are processed by signal processing circuits, and an arithmetic circuit, which issues an output as distance information. An integrating circuit integrates the signal outputted by the arithmetic circuit and outputs a signal corresponding to the results of the integration. A CPU determines the distance to the object based on the signal outputted from the integrating circuit. In this distance measurement system, the integrating circuit starts integrating the signal outputted from the arithmetic circuit, immediately after the output, i.e., distance signal, from the arithmetic circuit is stabilized.

    摘要翻译: 一种距离测量系统,用于在保持高精度的情况下,以一点时间差测量距离。 红外发射二极管(IRED)在待测距离处朝向物体发射光束,并且位置敏感检测器(PSD)接收反射光。 来自PSD的输出由信号处理电路和作为距离信息发出输出的运算电路来处理。 积分电路对运算电路输出的信号进行积分,输出与积分结果对应的信号。 CPU基于从积分电路输出的信号确定到物体的距离。 在该距离测量系统中,积分电路开始将从运算电路输出的信号紧接在运算电路输出之后,即距离信号稳定。

    Rangefinder apparatus
    29.
    发明授权
    Rangefinder apparatus 失效
    测距仪

    公开(公告)号:US06181877B2

    公开(公告)日:2001-01-30

    申请号:US09413234

    申请日:1999-10-07

    申请人: Hideo Yoshida

    发明人: Hideo Yoshida

    IPC分类号: G03B1336

    摘要: In a rangefinder apparatus, a clamping circuit receives a far-side signal I2 output from a first signal processing circuit and outputs a signal I2c having a greater value than a clamp signal Ic and the far-side signal I2. An arithmetic circuit receives a near-side signal I1 output from a second signal processing circuit and the signal I2c output from the clamping circuit, calculates an output ratio (I1/(I1+I2c)), and outputs an output ratio signal. An integrating circuit receives the output ratio signal and, together with an integrating capacitor, integrates the output ratio signal several times. When switching the level of the clamp signal Ic before subsequent distance measuring operations in a continuous distance measurement, a clamp level switching circuit adds a value to the clamp signal, setting a new level.

    摘要翻译: 在测距装置中,钳位电路接收从第一信号处理电路输出的远端信号I2,并输出具有比钳位信号Ic和远端信号I2大的值的信号I2c。 运算电路接收从第二信号处理电路输出的近端信号I1和从钳位电路输出的信号I2c,计算输出比(I1 /(I1 + I2c)),输出输出比信号。 积分电路接收输出比信号,并与积分电容器一起对输出比信号进行多次积分。 在连续距离测量中,在后续距离测量操作之前切换钳位信号Ic的电平时,钳位电平切换电路将一个值加到钳位信号上,设置一个新的电平。

    Error correction coding and decoding method, and circuit using said
method

    公开(公告)号:US5951708A

    公开(公告)日:1999-09-14

    申请号:US48954

    申请日:1998-03-26

    申请人: Hideo Yoshida

    发明人: Hideo Yoshida

    摘要: In the coding and decoding of Reed-Solomon codes formed of symbols larger than information symbols, redundant circuitry is eliminated, error detection and correction are preformed using a simple construction, and the reliability of error detection and correction is improved by processing only data of the same size as the information symbols. Two bits of dummy data which are surplus bits in 10 bits of one symbol of information are supplied from a dummy data input circuit to 8 bit input data. At the same time, syndrome data is generated form the surplus parts of check symbols by a syndrome data correction circuit. A part of the 10 bit data is selected by a selector, and supplied to a Galois field summation circuit. The output of the Galois field summation circuit is output to a register, and the output of this register is either selected without modification or via a Galois field coefficient multiplying circuit by a selector, and supplied to the Galois field summation circuit. The output of the register is output as syndrome data by a syndrome output terminal.