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NED

UME-0041-01 XCM20125GIG

43

4.8 Pixel Correction

Generally speaking, image sensors (CCD, CMOS and so on) have fixed

pattern noise and photo response non-uniformity. When you use the lens,

lens

shadings and light sources also can cause non-uniformity. The camera is set to

the optimal correction before shipping in order to provide images of high grade.

The camera also has the function of user white correction to cope with lens

shading and non-uniform illumination.

Cal_bl : Output data of each pixel at perfectly dark (factory correction)
Cal_wh : Output data of each pixel in uniform illumination (factory

correction)

or in taking a picture of subject for correction (user white correction)

Target_Val : Target value for user correction (10bit output conversion value)
Vin:Input data (Before correction) Vout :Output data (After correction)
The corrected data is expressed in the following equation.
Vout=(Vin-Cal_bl) x Target_val / (Cal_wh-Cal_bl)

Image“before”user arbitrary pixel Green line is Luminance Profile
is corrected.

Image“after”user arbitrary pixel Green line is Luminance Profile
is corrected.

Figure 4-8-1 Waveform and image before and after bit correction

4.8.1 PixelCorrect Mode

The available Pixel Correction modes are Disable (no correction), FactoryWhite

(uses factory set data), UserWhite (uses arbitrary user data).

Luminance Profile

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Содержание XCM20125GIG

Страница 1: ...User s Manual Line Scan Camera Type XCM20125GIG NIPPON ELECTRO SENSORY DEVICES CORPORATION GigE Vision is a registered trademark of AIA...

Страница 2: ...cause harmful interference in which case the user will be required to correct the interference at his or her own expense For Customers in the EU This equipment has been tested and found to comply with...

Страница 3: ...ise specified to do so in this manual When hands are wet avoid handling this product and do not touch any of the connection cable pins or other metallic components Do not operate this product in an en...

Страница 4: ...air blower to remove the dust particles Dip a cotton swab into ethanol alcohol and clean the camera window Be careful not to scratch the glass Use of non infrared lighting such as a daylight fluoresc...

Страница 5: ...ses fall outside of the scope of this warranty Exclusions from Warranty Coverage We will under no circumstances assume responsibility for the following cases damage caused by fire earthquake other act...

Страница 6: ...nufactured as a general purpose product for general industry In applications expected to be life critical or safety critical the installer or user is requested to install double or triple failsafe sys...

Страница 7: ...nput 23 3 4 4 RS 422 Output 23 3 4 5 LVDS Output 24 3 4 6 TTL Output 24 3 4 7 Relation of External Trigger Input and Output 25 3 5 RJ 45 Connector 26 3 6 LED status 26 4 Camera Control 27 4 1 List of...

Страница 8: ...vert Settings 48 4 11 2 External Line Trigger Output Enable Disable 48 4 11 3 External Line Trigger Input Terminate Enable Disable 48 4 11 4 External Line Trigger Chattering Prevention Settings 49 4 1...

Страница 9: ...a transmission up to 100m using a CAT 5e cable or above Single power source DC12 15V for operation Pixel non linearity shading correcting function 1 2 Applications Inspection of Transparent panels and...

Страница 10: ...roller end face Automobile component Architectural reinforcement parts Various pin parts Typical detection item chip dent scratch chip of roller end face external dimensions Device specification 1 Cam...

Страница 11: ...e central 1K or less Mono8 10 3 97 7 Mono10 17 8 56 1 Mono10packed 13 4 74 8 Saturation Exposure lx s typically 0 1 Visible Area 400 700nm Responsivity V lx s typically Minimum Gain Pixel Correction I...

Страница 12: ...ass g Camera only 445 F Mount Compatible Standards 1 Shading Correction 2 Gain Offset Video Output Control 3 Programmable Exposure Control 4 Scan Direction Switching 1 DN Digital Number 8bit 0 255 10b...

Страница 13: ...front 8 places at the side to fix the camera Or use the 1 4 20UNC screw hole the screw hole for a tripod 1 place at the side to fix the camera If using the front panel M4 mounting holes the screw leng...

Страница 14: ...NED XCM20125GIG UME 0041 01 14 Figure 2 2 1 Dimensions Nikon F Mount...

Страница 15: ...NED UME 0041 01 XCM20125GIG 15 Figure 2 2 2 Dimensions Nikon C Mount...

Страница 16: ...light source LED light sources are relatively inexpensive provide a uniform field and longer life span compared to other light sources However they also require a camera with excellent sensitivity Hal...

Страница 17: ...additional cameras use a NIC Intel Gigabit CT Desktop Adapter EXPI9301CTetc on the PCI or PCI Express bus 2 Connect the power to the camera Note Use a power cable to connect the camera power to the c...

Страница 18: ...gabit NIC Multi port Gigabit NIC 1port Gigabit Switching HUB PC PC PC PC The example of connection of 1PC and 1camera The example of connection of 1PC and 3 cameras The example of connection of 1PC an...

Страница 19: ...NED UME 0041 01 XCM20125GIG 19 3 2 Input Output Connectors and Indicator The layout of input output connectors and the indicator lamp are as follows Figure 3 2 1 Input Output Connectors and Indicator...

Страница 20: ...Cable 1 DC12 15V White 4 GND Green 2 DC12 15V Red 5 GND Black 3 DC12 15V NC 6 GND NC The camera requires a single power supply DC 12 to 15V When selecting a power source choose one with the capacity...

Страница 21: ...ine_Trigger_OUT OUT 2 Line_Trigger_IN IN 8 Frame_Trigger_IN IN 3 Unused NC 9 Frame_Trigger_IN IN 4 Unused NC 10 Unused NC 5 GND GND 11 Frame_Trigger_OUT OUT 6 Line_Trigger_OUT OUT 12 Frame_Trigger_OUT...

Страница 22: ...le receivers The signal level will decrease and the signal will not be received correctly Figure 3 4 2 External Trigger Input Connection Diagram differential 3 4 2 LVDS Input When using LVDS for input...

Страница 23: ...Figure 3 4 3 External Trigger Input Connection Diagram TTL 3 4 4 RS 422 Output To use the RS 422 output connect the camera with a differential twisted pair as showninfigure 3 4 4 For correct operation...

Страница 24: ...y 1 receiver per camera In addition be sure to check that Figure 3 4 5 External Trigger Output Connection Diagram LVDS 3 4 6 TTL Output To use TTL output connect the camera output as shown in figure 3...

Страница 25: ...output uses the external trigger input driver as an intermediary as shown in figure 3 4 7 Therefore it is possible to switch the output ON OFF by use of an enable resistor For settings see 4 10 3 Fram...

Страница 26: ...r applications where there is a lot of vibration or movement a screw lock cable can be used Table 3 5 1 RJ 45 Connector pin assignments Figure 3 5 1 RJ 45 connector 3 6 LED status LED Green Lights whe...

Страница 27: ...x0000A000 0 Stop packet transfer Width 0x0000A004 4 2048 Number of pixels in a line Must be a multiple of 2 Height 0x0000A008 16 4096 Number of lines in a frame OffsetX 0x0000A00C 0 2044 X Offset Pixe...

Страница 28: ...rameTriggerEnable 0x0000A220 Disable 0 Enable 1 Frame Trigger Mode Disable Enable FrameTriggerConfig 0x0000A224 Frame Trigger Setting Inverter Bit 31 OFF 0 ON 1 Input Invert OFF ON Ext_out Bit 30 OFF...

Страница 29: ...s are shown below Control Item Address Value Description Width 0x0000A004 2048 1 Line Pixel Width Height 0x0000A008 2048 1 Frame Line Count OffsetX 0x0000A00C 0 X Offset Pixel No PixelFormat 0x0000A01...

Страница 30: ...l Hold Time Frame Trigger Rising FrameTriggerMaskTimeF 0x0000A238 0 Input Signal Hold Time Frame Trigger Falling 4 2 Acquisition Control Starting and stopping image acquisition can be controlled via t...

Страница 31: ...NED UME 0041 01 XCM20125GIG 31 4 3 Image Format Control Set the starting position width height and pixel format of the captured frames Figure 4 3 1 ImageFormatControl Registers image from GigEGrab...

Страница 32: ...1 To go from OffsetX 0 Width 2048 to OffsetX 512 Width 1024 First set Width to 1024 then set OffsetX to 512 e g 2 To go from OffsetX 512 Width 1024 to OffsetX 0 Width 2048 First set OffsetX to 0 then...

Страница 33: ...Height 16 4096 Figure 4 3 2 1 Area of 1 Frame Notes The time for 1 frame can be calculated as follows 1 Frame period us 1 Line Scan Period us x Height Depending on the scan period and the height setti...

Страница 34: ...llows Format Setting Value Mono8 0x01080001 Mono10 0x01100003 Mono10Packed 0x010C0004 The pixel layout of each format is as below bit LSB MSB 8 standard 10 11 10 10bit LSB MSB 11 10 Figure 5 4 1 Pin A...

Страница 35: ...nalog digital Image from GigEGrab As the diagram below indicates increasing the gain setting increases the slope of the camera s response curve and results in a higher camera output for a given amount...

Страница 36: ...gain multiplication factor can be calculated as follows Digital Gain register value val 0 511 gain multiplication factor gain 1 2 gain 2047 2047 val 2 val 2047 gain 1 gain 2 Notes Gain and noise valu...

Страница 37: ...of your camera system 2 The gradients of lines do not change 4 6 Exposure Mode and Timing The camera has three exposure modes Figure 4 6 1 Exposure Mode Exposure Time registers Image from GigEGrab Se...

Страница 38: ...mage width Width x Bytes pixel image transmission rate 115Mbyte s x 106 Mono8 1 Byte pix Mono10 2 Bytes pix Mono10Packed 1 5 Bytes pix Notes Setting a scan cycle lower than 2 may result in dropped fra...

Страница 39: ...k 2 Dividing P Programmable Exposure Time Setting s S Scan Rate s Clock 62 5 MHz fixed Padding 20 fixed Dividing 2 4 Counter 134 32767 Example Clock 62 5 Dividing 2 Counter 1000 Programmable Exposure...

Страница 40: ...of exposure and readout is explained below As with free run exposure mode the minimum scan cycle changes depending on the image format Table 4 6 2 External Trigger Exposure Mode Trigger Edge Item Symb...

Страница 41: ...nd exposure is explained below As with free run exposure mode the minimum scan cycle changes depending on the image format Table 4 6 3 External Trigger Trigger Level Exposure Mode Time Setting Item Sy...

Страница 42: ...7 3 Test Image of 8bit 2048 Pixels It increases in increments of 1DN to 255DN in order from the first pixel 0DN This pattern is repeatedly output Figure 4 7 4 Test Pattern of 10bit 2048 Pixels Figure...

Страница 43: ...pixel in uniform illumination factory correction or in taking a picture of subject for correction user white correction Target_Val Target value for user correction 10bit output conversion value Vin In...

Страница 44: ...focus the lens Figure 4 8 2 Pixel Correction Registers image from GigEGrab Write 1 to the PixelCorrectDataSave register in the included viewer software click Execute then press the Enter key and the U...

Страница 45: ...ut direction register name ReverseX setting value 0 Forward 1 Reverse Figure 4 9 1 Scan direction switching register the GigEGrab picture 4 10 External Frame Trigger Input settings for the External Fr...

Страница 46: ...the Frame Trigger signal is Hi If Acquisition Start 0 while the Frame Trigger signal is Hi frames will stop being generated even if the number of lines is less than Height 4 10 2 External Frame Trigg...

Страница 47: ...time during which changes in the signal rising edge are invalid MaskTimeF The time during which changes in the signal falling edged are invalid Using this function you can control the generation of u...

Страница 48: ...value 0 Invert function OFF 1 Invert Function ON 4 11 2 External Line Trigger Output Enable Disable This register enables or disables the external trigger signal output register name LineTriggerConfi...

Страница 49: ...the case of External Trigger Level lines may be missed or exposure times may be incorrect so set the value as small as possible If you set MaskTimeF to too large a value valid trigger changes may go u...

Страница 50: ...not input or the signal is out of the permitted range image capture or camera setting may not be possible See 4 6 2 and 4 6 3 Table 4 12 1 Camera Operating Mode and External Line Trigger Signals Camer...

Страница 51: ...sure that the network on which you connect your GigE camera is a dedicated network and not shared with any other data transmitting devices Not only will image data not be correctly obtained it may als...

Страница 52: ...s Do not set the size larger than your network s MTU Maximum Transmission Unit Doing so will result in image data not being able to be sent 6 2 Packet Delay Packet Delay can be set via the following r...

Страница 53: ...125 Mbyte s Notes The maximum Gigabit Ethernet transfer rate may vary depending on the processing power of your PC and NIC Allowing some margin it is recommended to calculate around 110 120 Mbytes s...

Страница 54: ...d should be handled like other optical components with care If you use the camera in a dusty area prepare a dust proof enclosure Dust can obscure pixels producing dark lines on the image 7 3 Cleaning...

Страница 55: ...apacity of the power source is sufficient Connect the camera and the PC with LAN cables Use a 1000BASE T compatible device as your network adapter Are you using the supplied GigEGrab software Can the...

Страница 56: ...t the full aperture The optical axes of the camera and the image sensor are aligned The capture software must support the camera s pixel format Check whether the software included on the GigEGrab can...

Страница 57: ...ed for 3 or more years or the ambient temperature is higher than room temperature Check the deterioration of the power supply The camera LAN cables and the power source cable are in swinging motion Ch...

Страница 58: ...a will become hotter than the ambient temperature while in operation because of self heating Allow sufficient air circulation around the camera to give it a longer life Keep the ambient temperature wi...

Страница 59: ...9 2 Contact for support Nippon Electro Sensory Devices Corporation Head Office 2 5 12 Itachibori Nishi Ku Osaka 550 0012 Japan Phone 81 6 6534 5300 Fax 81 6 6534 6080 Tokyo Office Gibraltar Ohi BLD Ro...

Страница 60: ...duct Support If there is a problem with your camera after checking it in accordance to the troubleshooting turn off the power and call your NED representative When contacting us with a problem please...

Страница 61: ...NED UME 0041 01 XCM20125GIG 61 Revision History Revision Number Date Changes 01 10 Aug 2013 Initial release...

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