CN105163045B - A kind of method for reading out pixel signals for imaging sensor - Google Patents
A kind of method for reading out pixel signals for imaging sensor Download PDFInfo
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- CN105163045B CN105163045B CN201510658913.7A CN201510658913A CN105163045B CN 105163045 B CN105163045 B CN 105163045B CN 201510658913 A CN201510658913 A CN 201510658913A CN 105163045 B CN105163045 B CN 105163045B
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Abstract
The present invention relates to a kind of method for reading out pixel signals for imaging sensor, this method are as follows：Bus transfer module is added between pel array and column analog-to-digital converter array；T the time required to analog-to-digital conversion is divided into M period, by bus transfer module by among multiple pixel signal samplings in institute's windowing to column analog-to-digital converter within each period, and each pixel signal of all pixel signals gathered within M period corresponds to a column analog-to-digital converter；After the pixel signal acquisition of M period, it is stored with all column analog-to-digital converters of pixel signal while the progress analog-to-digital conversion that works, the result of data conversion is exported by data outputting module.Multiple picture element signals in one or more regions are placed in the memory cell of column analog-to-digital converter array by timesharing of the present invention, are carried out analog-to-digital conversion simultaneously afterwards and are read, improve the frame frequency of imaging sensor.
Description
Technical field
The invention belongs to semiconductor image detection technology field, and in particular to a kind of reading of image sensor pixel signal
Method.
Background technology
The speed of imaging sensor is frame speed, is an important indicator for characterizing image sensor performance.For using row
For the imaging sensor of analog-to-digital conversion, it will usually an analog-digital converter is placed below in each row of pel array.It is tied
As shown in figure 1, within a row time, the picture element signal of each row is all carried out structure by the digital analog converter below pixel
Change and exported by data outputting module.
In many applications, user is only interested in the part row in pixel faces battle array, at this moment can carry out fenestration procedure,
As shown in Fig. 2 only export the pixel signal of row interested.The each modulus of the imaging sensor of prior art turns in this case
Parallel operation is only used for a row picture element signal corresponding to conversion, when carrying out the fenestration procedure of column direction, only under row interested
The AD conversion unit work of side.Because the row time was limited by the analog-to-digital conversion time, its frame frequency can't be lifted.
The content of the invention
The technical problem to be solved in the present invention is to provide a kind of frame frequency can be lifted in the case where carrying out fenestration procedure
Method for reading out pixel signals for imaging sensor.
In order to solve the above-mentioned technical problem, the method for reading out pixel signals for imaging sensor of the invention is as follows：
Bus transfer module is added between pel array and column analog-to-digital converter array；Analog-to-digital conversion is taken
Between T be divided into M period, by bus transfer module by multiple pixel signal samplings in institute's windowing within each period
To among column analog-to-digital converter, and each pixel signal of all pixel signals gathered within M period corresponds to one
Column analog-to-digital converter；After the pixel signal acquisition of M period, all column analog-to-digital converters for being stored with pixel signal are same
When work carry out analog-to-digital conversion, the result of data conversion exported by data outputting module；It will be opened a window according to the method described above
Remaining pixel signal of mouth carries out analog-to-digital conversion by bus transfer module samples to column analog-to-digital converter, and passes through data output
Module output data transformation result.
The method for reading out pixel signals for imaging sensor of the present invention comprises the following steps that：
If imaging sensor shares N row pixels, institute's windowing quantity is 1, and the columns of window is n, an analog-to-digital conversion institute
Take time as T；By N/2n value round numbers, it is M to make the integer, then T the time required to an analog-to-digital conversion is divided into M time
Section；Institute's windowing pixel reading method comprises the steps：
Step 1: within first period, 2n pixel signal of the row of window first and second is passed through into bus transfer module
Sample among the column analog-to-digital converter of any 2n roads；
Step 2: below in any time period i, i=2 ... M；By the 2n of the row of window the 2nd (i-1)+1,2 (i-1)+2
Among pixel signal does not store the 2n roads column analog-to-digital converter of pixel signal arbitrarily by bus transfer module samples to other, with
This analogizes, and in an analog-to-digital conversion time T, the 2M row pixel signals of window are passed through into bus transfer module samples to 2n × M
Among the column analog-to-digital converter of road；
Step 3: 2n × M roads column analog-to-digital converter, which works, carries out analog-to-digital conversion simultaneously, the result of data conversion is defeated by data
Go out module to be exported；
All row pixel signals of window are turned by bus transfer module samples to row modulus successively according to the method described above
Parallel operation carries out analog-to-digital conversion, and passes through data outputting module output data transformation result.
The method for reading out pixel signals for imaging sensor of the present invention can also use following specific steps：
If imaging sensor shares N row pixels, institute's windowing quantity is 1, and the columns of window is n, and bus transfer module is every
The individual sampling period is by the individual pixel signal samplings of n ' to n ' roads column analog-to-digital converter, n ' ＜ n or n ' ＞ n, an analog-to-digital conversion institute
Take time as T；By N/n ' value round numbers, it is M to make the integer, then T the time required to an analog-to-digital conversion is divided into M time
Section；Institute's windowing pixel reading method comprises the steps：
Step 1: within first period, the individual pixel signals of 1~n ' of window are led to according to order line by line
Bus transfer module samples are crossed among the column analog-to-digital converter of any n ' roads；
Step 2: in second period, the individual pixel signals of the n-th '+1~2n ' are passed through according to order line by line total
Among line transport module samples n ' the roads column analog-to-digital converter that other do not store pixel signal arbitrarily, by that analogy, once
In analog-to-digital conversion time T, the individual pixel signals of M × n ' in window are turned by bus transfer module samples to M × n ' roads row modulus
Among parallel operation；
Step 3: M × n ' roads column analog-to-digital converter, which works, carries out analog-to-digital conversion simultaneously, the result of data conversion is defeated by data
Go out module to be exported；
All row pixel signals of window are turned by bus transfer module samples to row modulus successively according to the method described above
Parallel operation carries out analog-to-digital conversion, and passes through data outputting module output data transformation result.
The method for reading out pixel signals for imaging sensor of the present invention can also use following specific steps：
If imaging sensor shares N row pixels, institute's windowing quantity is 1, and the columns of window is n, an analog-to-digital conversion institute
Take time as T；By 2N/n value round numbers, it is M to make the integer, then T the time required to an analog-to-digital conversion is divided into M time
Section；Institute's windowing pixel reading method comprises the steps：
Step 1: within first, second period, the n row pixel signals of window the first row are passed through into bus transfer mould
Block is sampled among the column analog-to-digital converter of any n roads；
Step 2: within the 3rd, the 4th period, the n row pixel signals of the row of window second are passed through into bus transfer mould
Block is sampled among any n column analog-to-digital converters that remaining does not store pixel signal；By that analogy, in an analog-to-digital conversion time
In T, by the pixel signal of M/2 rows in window by bus transfer module samples to n × M/2 roads column analog-to-digital converter among；
Step 3: n × M/2 column analog-to-digital converters, which work, carries out analog-to-digital conversion simultaneously, the result of data conversion is defeated by data
Go out module to be exported；
All row pixel signals of window are turned by bus transfer module samples to row modulus successively according to the method described above
Parallel operation carries out analog-to-digital conversion, and passes through data outputting module output data transformation result.
The method for reading out pixel signals for imaging sensor of the present invention can also use following specific steps：
If imaging sensor shares N row pixels, institute's windowing quantity is m, m ＞ 1；The columns of each window is respectively n1、
n2、……、nm, one time analog-to-digital conversion required time is T；By N/ (n1+n2+……+nm) value round numbers, it is M to make the integer, then
T the time required to analog-to-digital conversion is divided into M period；Institute's windowing pixel reading method comprises the steps：
Step 1: within first period, by the n of first window the first row1Row pixel signal passes through bus transfer
Module samples are to any n1Among the column analog-to-digital converter of road, by the n of second window the first row2Row pixel signal is passed by bus
Defeated module samples do not store the n of pixel signal to remaining2Among the column analog-to-digital converter of road, by that analogy, by m-th of window first
Capable nmRow pixel signal does not store the n of pixel signal by bus transfer module samples to residuemAmong column analog-to-digital converter；
Step 2: below in any time period i, i=2 ... M；By the n of first row of window i-th1Row pixel signal leads to
Cross the n that bus transfer module samples do not store pixel signal to residue1Among column analog-to-digital converter, by second row of window i-th
N2Row pixel signal does not store the n of pixel signal by bus transfer module samples to residue2Among column analog-to-digital converter, with
This analogizes, by the n of m-th of row of window i-thmRow pixel signal does not store pixel signal by bus transfer module samples to residue
NmAmong column analog-to-digital converter；
Step 3: (n1+n2+……+nm) × M road column analog-to-digital converters work simultaneously carries out analog-to-digital conversion, data conversion
As a result exported by data outputting module；
All row pixel signals of each window are passed through into bus transfer module samples to row modulus successively according to the method described above
Converter carries out analog-to-digital conversion, and passes through data outputting module output data transformation result.
In the step 1, within first period, by the n of first window the first row1Row pixel signal passes through total
Line transport module samples 1~n1Among column analog-to-digital converter, by the n of second window the first row2Row pixel signal passes through total
Line transport module samples n-th1× M+1~n1×M+n2Among column analog-to-digital converter, by that analogy, by m-th of window the first row
NmRow pixel signal passes through bus transfer module samples to (n1+n2+……+(nm- 1)) × M+1~(n1+n2+……+
(nm-1))×M+nmAmong column analog-to-digital converter；
In the step 2, below in any time period i, i=2 ... M；By the n of first row of window i-th1Row pixel
Signal passes through bus transfer module samples to (i-1) × n1+ 1~i × n1Among column analog-to-digital converter, by second window i-th
Capable n2Row pixel signal passes through bus transfer module samples to n-th1×M+(i-1)×n2+ 1~n1×M+i×n2Row modulus turns
Among parallel operation, by that analogy, by the n of m-th of row of window i-thmRow pixel signal passes through bus transfer module samples to (n1+n2
+……+(nm-1))×M+(i-1)×nm+ 1~(n1+n2+……+nm-1)×M+i×nmAmong column analog-to-digital converter.
The present invention proposes a kind of new method for reading out pixel signals, adds before pel array with column analog-to-digital converter array
Add up line transport module.The modulus that picture element signal can not only be transferred to below the pixel column by the bus transfer module turns
Parallel operation is changed, additionally it is possible to is transferred to the analog-digital converter below other pixel columns and is changed.When entering ranks fenestration procedure
When, all column analog-to-digital converters all work, and within an analog-to-digital conversion time, timesharing is by multiple pictures in one or more regions
Plain signal is placed in the memory cell of column analog-to-digital converter array, is carried out analog-to-digital conversion simultaneously afterwards and is read, so as to improve
The frame frequency of imaging sensor.
Brief description of the drawings
The present invention is described in further detail with reference to the accompanying drawings and detailed description.
Fig. 1 is the image sensor architecture schematic diagram using column analog-to-digital converter.
Fig. 2 is that imaging sensor enters ranks fenestration procedure schematic diagram.
Fig. 3 is to enter ranks fenestration procedure schematic diagram using the present invention.
Fig. 4 a, Fig. 4 b, Fig. 4 c are respectively first, second in the embodiment of the present invention 1, imaging sensor in the m-th period
Picture element signal sampling schematic diagram.
Fig. 5 a, Fig. 5 b are the picture element signal of imaging sensor in first, second period in the embodiment of the present invention 2 respectively
Sample schematic diagram.
Schematic diagram when Fig. 6 is any ranks start-stop of single window.
Fig. 7 a, Fig. 7 b, Fig. 7 c are three kinds of example schematic diagrams of any ranks start-stop of multiple windows.
Embodiment
As shown in figure 3, the method for reading out pixel signals for imaging sensor of the present invention is in pel array and row modulus
Bus transfer module is added between switch array, picture element signal is transferred to positioned at the pixel column using the bus transfer module
Column analog-to-digital converter below the column analog-to-digital converter of lower section and other pixel columns is changed.When entering ranks fenestration procedure
When, T the time required to an analog-to-digital conversion can be divided into M period, will by bus transfer module within each period
Multiple pixel signal samplings in institute's windowing are among column analog-to-digital converter, and all pictures gathered within M period
First each pixel signal of signal corresponds to a column analog-to-digital converter；After the pixel signal acquisition of M period, it is stored with
All column analog-to-digital converters of pixel signal work simultaneously carries out analog-to-digital conversion, and the result of data conversion is entered by data outputting module
Row output；Remaining pixel signal of each window is entered by bus transfer module samples to column analog-to-digital converter according to the method described above
Row analog-to-digital conversion, and pass through data outputting module output data transformation result.
Embodiment 1
As shown in fig. 4 a, imaging sensor shares N row pixels, and AD conversion unit all the way is placed below in each column pixel.Institute
Windowing quantity is 1, and the window columns is n1.Bus transfer module uses a bus transfer unit, can simultaneous transmission n1Road picture
Plain signal.If it is T the time required to an analog-to-digital conversion, by N/n1Value round numbers, it is M to make the integer, and this time is divided into M
Period.Institute's windowing pixel reading method comprises the steps：
Step 1: within first period, by the n of window the first row1Row pixel signal is adopted by bus transfer unit
Sample is to 1~n1Among column analog-to-digital converter, as shown in fig. 4 a；
Step 2: below in any time period i, i=2 ... M；By the n of the row of window i-th1Row pixel signal passes through bus
Transmission unit samples (i-1) × n1+ 1~i × n1Among column analog-to-digital converter, second time period samples as shown in Figure 4 b, the
M period sampling is as illustrated in fig. 4 c；
Step 3: n1× M road column analog-to-digital converters work simultaneously carries out analog-to-digital conversion, and the result of data conversion is defeated by data
Go out module to be exported；
In the M period in second analog-to-digital conversion time T, respectively by M+1, M+2 ... the pixels of 2M rows is believed
Number by being changed among bus transfer unit sampling to N column analog-to-digital converters；By that analogy, successively will according to the method described above
All row pixel signals of the window carry out analog-to-digital conversion by bus transfer unit sampling to column analog-to-digital converter, and pass through number
According to output module output data transformation result.
, can also be by the n of window the first row within first period1Row pixel signal passes through bus transfer unit sampling
To (N-n1Among)~N column analog-to-digital converters；Within second period, by the n of the second row1Row pixel signal passes through bus
Transmission unit samples (N-2n1)~(N-n1) among -1 column analog-to-digital converter, by that analogy, in an analog-to-digital conversion time T
It is interior by the common M × n of M rows in window1Individual pixel signal acquisition is to M × n1Road column analog-to-digital converter.
Embodiment 2
If imaging sensor shares N row pixels, institute's windowing quantity is 1, and the columns of window is n, an analog-to-digital conversion institute
Take time as T；By N/2n value round numbers, it is M to make the integer, then T the time required to an analog-to-digital conversion is divided into M time
Section；Institute's windowing pixel reading method comprises the steps：
Step 1: within first period, 2n pixel signal of the row of window first and second is passed through into bus transfer module
Sample among the column analog-to-digital converter of any 2n roads；
Step 2: below in any time period i, i=2 ... M；By the 2n of the row of window the 2nd (i-1)+1,2 (i-1)+2
Among pixel signal does not store the 2n roads column analog-to-digital converter of pixel signal arbitrarily by bus transfer module samples to other, with
This analogizes, and in an analog-to-digital conversion time T, the 2M row pixel signals of window are passed through into bus transfer module samples to 2n × M
Among the column analog-to-digital converter of road；
Step 3: 2n × M roads column analog-to-digital converter, which works, carries out analog-to-digital conversion simultaneously, the result of data conversion is defeated by data
Go out module to be exported；
All row pixel signals of window are turned by bus transfer module samples to row modulus successively according to the method described above
Parallel operation carries out analog-to-digital conversion, and passes through data outputting module output data transformation result.
In the present embodiment, within first period, 2n pixel signal of first and second row in window can be by total
Before line transport module samples among the column analog-to-digital converter of 2n roads, then in other times section, the pixel of other rows is believed successively
Number sample among column analog-to-digital converter below；Or within first period, sample rear 2n roads column analog-to-digital converter
Among, afterwards successively by other row pixel signal acquisitions to column analog-to-digital converter above in other times section, or with other
Mode stores each column analog-to-digital converter.
Embodiment 3
If imaging sensor shares N row pixels, institute's windowing quantity is 1, and the columns of window is n, an analog-to-digital conversion institute
Take time as T；By 2N/n value round numbers, it is M to make the integer, then T the time required to an analog-to-digital conversion is divided into M time
Section；Institute's windowing pixel reading method comprises the steps：
Step 1: within first, second period, the n row pixel signals of window the first row are passed through into bus transfer mould
Block is sampled among the column analog-to-digital converter of any n roads；
Step 2: within the 3rd, the 4th period, the n row pixel signals of the row of window second are passed through into bus transfer mould
Block is sampled among any n column analog-to-digital converters that remaining does not store pixel signal；By that analogy, in an analog-to-digital conversion time
In T, by the pixel signal of M/2 rows in window by bus transfer module samples to n × M/2 roads column analog-to-digital converter among；
Step 3: n × M/2 column analog-to-digital converters, which work, carries out analog-to-digital conversion simultaneously, the result of data conversion is defeated by data
Go out module to be exported；
All row pixel signals of window are turned by bus transfer module samples to row modulus successively according to the method described above
Parallel operation carries out analog-to-digital conversion, and passes through data outputting module output data transformation result.
In the present embodiment, within first period, 2n pixel signal of first and second row in window can be by total
Before line transport module samples among the column analog-to-digital converter of 2n roads, then in other times section, the pixel of other rows is believed successively
Number sample among column analog-to-digital converter below；Or within first period, sample rear 2n roads column analog-to-digital converter
Among, afterwards successively by other row pixel signal acquisitions to column analog-to-digital converter above in other times section, or with other
Mode stores each column analog-to-digital converter.
Embodiment 4
If imaging sensor shares N row pixels, institute's windowing quantity is 1, and the columns of window is n, and bus transfer module is every
The individual sampling period is by the individual pixel signal samplings of n ' to n ' roads column analog-to-digital converter, n ' ＜ n or n ' ＞ n, an analog-to-digital conversion institute
Take time as T；By N/n ' value round numbers, it is M to make the integer, then T the time required to an analog-to-digital conversion is divided into M time
Section；Institute's windowing pixel reading method comprises the steps：
Step 1: within first period, the individual pixel signals of 1~n ' of window are led to according to order line by line
Bus transfer module samples are crossed among the column analog-to-digital converter of any n ' roads；For example, it is assumed that the columns of window is 20, bus transfer
Module each sampling period can be by 16 pixel signal acquisitions into 16 road column analog-to-digital converters, then in first period
It is interior, according in order by the 1st~16 pixel signal of window pass through bus transfer module samples to any n ' roads row modulus turn
Among parallel operation；Assuming that the columns of window is 20, bus transfer module each sampling period can arrive 32 pixel signal acquisitions
In 32 road column analog-to-digital converters, then within first period, according in order by 20 pixel signals of window the first row and
Among 12 pixel signals of the second row are by bus transfer module samples to any 32 road column analog-to-digital converter；
Step 2: in second period, the individual pixel signals of the n-th '+1~2n ' are passed through according to order line by line total
Among line transport module samples n ' the roads column analog-to-digital converter that other do not store pixel signal arbitrarily, by that analogy, once
In analog-to-digital conversion time T, the individual pixel signals of M × n ' in window are turned by bus transfer module samples to M × n ' roads row modulus
Among parallel operation；Still so that the columns of window is 20 as an example, 16 pixels can be believed when bus transfer module each sampling period
When number collecting in 16 road column analog-to-digital converters, in second period, according in order by the 17th~20 of window the first row the
1st~12 pixel signal of individual pixel signal and the second row does not store pixel arbitrarily by bus transfer module samples to other
Among 16 road column analog-to-digital converters of signal；32 pixel signal acquisitions can be arrived when bus transfer module each sampling period
When in 32 road column analog-to-digital converters, in second period, according in order by the 13rd~20 pixel letter of the row of window second
Number and the 1st~20 pixel signal and the 1st~4 pixel signal of fourth line of the third line arrived by bus transfer module samples
Other are not stored arbitrarily among 32 road column analog-to-digital converters of pixel signal；
Step 3: M × n ' roads column analog-to-digital converter, which works, carries out analog-to-digital conversion simultaneously, the result of data conversion is defeated by data
Go out module to be exported；
All row pixel signals of window are turned by bus transfer module samples to row modulus successively according to the method described above
Parallel operation carries out analog-to-digital conversion, and passes through data outputting module output data transformation result.
Embodiment 5
As shown in Figure 5 a, imaging sensor shares N row pixels, and AD conversion unit all the way is placed below in each column pixel.Institute
Windowing is 2, and the columns of window 1 is n1, the columns of window 2 is n2, n1=n2=N/4.Bus transfer module is passed using 2 buses
Defeated unit, each bus transfer unit energy simultaneous transmission N/4 roads picture element signal.If it is T the time required to an analog-to-digital conversion, by this
Time is divided into M=2 period.The pixel reading method of window 1 and window 2 comprises the steps：
Step 1: within first period, the N/4 row pixel signals of the first row of window 1 are passed through into bus transfer unit 1
Sample among 1~N/4 column analog-to-digital converters.The N/4 row pixel signals of the first row of window 2 are passed through into bus transfer list simultaneously
Member 2 is sampled among N/2+1~3N/4 column analog-to-digital converters.
Step 2: within second period, the N/4 row pixel signals of the row of window 1 second are passed through into bus transfer unit 1
Sample among N/4+1~N/2 column analog-to-digital converters.The N/4 row pixel signals of the row of window 2 second are passed by bus simultaneously
Defeated unit 2 is sampled among 3N/4+1~N column analog-to-digital converters.
Step 3: N roads analog-digital converter, which works, carries out analog-to-digital conversion simultaneously, the result of data conversion is by data outputting module
Exported.
In 2 periods in second analog-to-digital conversion time T, the N/4 row pixel signals of window 1 the 3rd, 4 rows are led to
Bus transfer unit 1 is crossed to sample among 1~N/2 column analog-to-digital converters.The N/4 row pixel of window 2 the 3rd, 4 rows is believed simultaneously
Number sampled by bus transfer unit 2 among N/2+1~N column analog-to-digital converters.By that analogy, according to the method described above successively
All row pixel signals of window 1,2 are subjected to analog-to-digital conversion by bus transfer unit sampling to column analog-to-digital converter, and led to
Cross data outputting module output data transformation result.
The invention is not restricted to above-described embodiment, and in each period, the pixel sampling in window is into column analog-to-digital converter
When can store each column analog-to-digital converter in any order.Window can also be from from imaging sensor the first row
Any a line rises, and can equally stop to bottom line, can also be from any one whereabouts, as shown in Figure 6.When number of windows is two
During the individual above, each the window's position can also from any ranks, any ranks stop, as shown in Fig. 7 a, 7b, 7c.Therefore it is every
Any simple deformation made on the basis of the technical scheme of the claims in the present invention 1 is all within the invention is intended to protection domain.
Claims (6)
- A kind of 1. method for reading out pixel signals for imaging sensor, it is characterised in that：In pel array and row analog-to-digital conversion Bus transfer module is added between device array；T the time required to analog-to-digital conversion is divided into M period, in each period It is interior by bus transfer module by among multiple pixel signal samplings in institute's windowing to column analog-to-digital converter, and at M The each pixel signal of all pixel signals of collection corresponds to a column analog-to-digital converter in period；By M period After pixel signal acquisition, be stored with all column analog-to-digital converters of pixel signal and meanwhile work carry out analog-to-digital conversion, data conversion Result exported by data outputting module；Remaining pixel signal of institute's windowing is passed through into bus transfer according to the method described above Module samples carry out analog-to-digital conversion to column analog-to-digital converter, and pass through data outputting module output data transformation result.
- 2. the method for reading out pixel signals according to claim 1 for imaging sensor, it is characterised in that：If imaging sensor shares N row pixels, institute's windowing quantity is 1, and the columns of window is n, and one time analog-to-digital conversion is taken Between be T；By N/2n value round numbers, it is M to make the integer, then T the time required to an analog-to-digital conversion is divided into M period；Institute Windowing pixel reading method comprises the steps：Step 1: within first period, 2n pixel signal of the row of window first and second is passed through into bus transfer module samples To among the column analog-to-digital converter of any 2n roads；Step 2: below in any time period i, i=2 ... M；By 2n pixel of the row of window the 2nd (i-1)+1,2 (i-1)+2 Among signal does not store the 2n roads column analog-to-digital converter of pixel signal arbitrarily by bus transfer module samples to other, with such Push away, in an analog-to-digital conversion time T, the 2M row pixel signals of window are arranged by bus transfer module samples to 2n × M roads Among analog-digital converter；Step 3: 2n × M roads column analog-to-digital converter, which works, carries out analog-to-digital conversion simultaneously, the result of data conversion is by data output mould Block is exported；All row pixel signals of window are passed through into bus transfer module samples to column analog-to-digital converter successively according to the method described above Analog-to-digital conversion is carried out, and passes through data outputting module output data transformation result.
- 3. the method for reading out pixel signals according to claim 1 for imaging sensor, it is characterised in that：If imaging sensor shares N row pixels, institute's windowing quantity is 1, and the columns of window is n, and bus transfer module is each adopted The sample cycle, n ' ＜ n or n ' ＞ n, one time analog-to-digital conversion was taken by the individual pixel signal samplings of n ' to n ' roads column analog-to-digital converter Between be T；By N/n ' value round numbers, it is M to make the integer, then T the time required to an analog-to-digital conversion is divided into M period；Institute Windowing pixel reading method comprises the steps：Step 1: within first period, the individual pixel signals of 1~n ' of window are passed through according to order line by line total Line transport module is sampled among the column analog-to-digital converter of any n ' roads；Step 2: in second period, the individual pixel signals of the n-th '+1~2n ' are passed by bus according to order line by line Among defeated module samples do not store n ' the roads column analog-to-digital converter of pixel signal arbitrarily to other, by that analogy, in a modulus In conversion time T, the individual pixel signals of M × n ' in window are passed through into bus transfer module samples to M × n ' roads column analog-to-digital converter Among；Step 3: M × n ' roads column analog-to-digital converter, which works, carries out analog-to-digital conversion simultaneously, the result of data conversion is by data output mould Block is exported；All row pixel signals of window are passed through into bus transfer module samples to column analog-to-digital converter successively according to the method described above Analog-to-digital conversion is carried out, and passes through data outputting module output data transformation result.
- 4. the method for reading out pixel signals according to claim 1 for imaging sensor, it is characterised in that：If imaging sensor shares N row pixels, institute's windowing quantity is 1, and the columns of window is n, and one time analog-to-digital conversion is taken Between be T；By 2N/n value round numbers, it is M to make the integer, then T the time required to an analog-to-digital conversion is divided into M period；Institute Windowing pixel reading method comprises the steps：Step 1: within first, second period, the n row pixel signals of window the first row are adopted by bus transfer module Sample is among the column analog-to-digital converter of any n roads；Step 2: within the 3rd, the 4th period, the n row pixel signals of the row of window second are adopted by bus transfer module Sample is not stored to remaining among any n column analog-to-digital converters of pixel signal；By that analogy, in an analog-to-digital conversion time T, By the pixel signal of M/2 rows in window by bus transfer module samples to n × M/2 roads column analog-to-digital converter among；Step 3: n × M/2 column analog-to-digital converters, which work, carries out analog-to-digital conversion simultaneously, the result of data conversion is by data output mould Block is exported；All row pixel signals of window are passed through into bus transfer module samples to column analog-to-digital converter successively according to the method described above Analog-to-digital conversion is carried out, and passes through data outputting module output data transformation result.
- 5. the method for reading out pixel signals according to claim 1 for imaging sensor, it is characterised in that：If imaging sensor shares N row pixels, institute's windowing quantity is m, m ＞ 1；The columns of each window is respectively n1、n2、……、 nm, one time analog-to-digital conversion required time is T；By N/ (n1+n2+……+nm) value round numbers, it is M to make the integer, then will once T is divided into M period the time required to analog-to-digital conversion；Institute's windowing pixel reading method comprises the steps：Step 1: within first period, by the n of first window the first row1Row pixel signal is adopted by bus transfer module Sample is to any n1Among the column analog-to-digital converter of road, by the n of second window the first row2Row pixel signal passes through bus transfer module Sample remaining n for not storing pixel signal2Among the column analog-to-digital converter of road, by that analogy, by the n of m-th of window the first rowm Row pixel signal does not store the n of pixel signal by bus transfer module samples to residuemAmong column analog-to-digital converter；Step 2: below in any time period i, i=2 ... M；By the n of first row of window i-th1Row pixel signal passes through total Line transport module samples the remaining n for not storing pixel signal1Among column analog-to-digital converter, by the n of second row of window i-th2Row Pixel signal does not store the n of pixel signal by bus transfer module samples to residue2Among column analog-to-digital converter, with such Push away, by the n of m-th of row of window i-thmRow pixel signal does not store the n of pixel signal by bus transfer module samples to residuem Among column analog-to-digital converter；Step 3: (n1+n2+……+nm) × M road column analog-to-digital converters work simultaneously carries out analog-to-digital conversion, the result of data conversion Exported by data outputting module；All row pixel signals of each window are passed through into bus transfer module samples to row analog-to-digital conversion successively according to the method described above Device carries out analog-to-digital conversion, and passes through data outputting module output data transformation result.
- 6. the method for reading out pixel signals according to claim 5 for imaging sensor, it is characterised in that：In the step 1, within first period, by the n of first window the first row1Row pixel signal passes through bus transfer Module samples are to 1~n1Among column analog-to-digital converter, by the n of second window the first row2Row pixel signal passes through bus transfer Module samples are to n-th1× M+1~n1×M+n2Among column analog-to-digital converter, by that analogy, by the n of m-th of window the first rowmRow Pixel signal passes through bus transfer module samples to (n1+n2+……+(nm- 1)) × M+1~(n1+n2+……+(nm-1))× M+nmAmong column analog-to-digital converter；In the step 2, below in any time period i, i=2 ... M；By the n of first row of window i-th1Row pixel signal Pass through bus transfer module samples to (i-1) × n1+ 1~i × n1Among column analog-to-digital converter, by second row of window i-th n2Row pixel signal passes through bus transfer module samples to n-th1×M+(i-1)×n2+ 1~n1×M+i×n2Column analog-to-digital converter Among, by that analogy, by the n of m-th of row of window i-thmRow pixel signal passes through bus transfer module samples to (n1+n2 +……+(nm-1))×M+(i-1)×nm+ 1~(n1+n2+……+nm-1)×M+i×nmAmong column analog-to-digital converter.
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