Allied Vision Technologies AVT Stingray Manual de instrucciones Pagina 274
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Configuration of the camera
STINGRAY Technical Manual V2.2.0
273
Auto shutter control
The table below illustrates the advanced register for auto shutter control.
The purpose of this register is to limit the range within which auto shutter
operates.
When both auto shutter and auto gain are enabled, priority is given to
increasing shutter when brightness decreases. This is done to achieve the
best image quality with lowest noise.
For increasing brightness, priority is given to lowering gain first for the same
purpose.
MinValue and MaxValue limits the range the auto shutter feature is allowed
to use for the regulation process. Both values are initialized with the mini-
mum and maximum value defined in the standard SHUTTER_INQ register
(multiplied by the current active timebase).
If you change the MinValue and/or MaxValue and the new range exceeds the
range defined by the SHUTTER_INQ register, the standard SHUTTER register
will not show correct shutter values. In this case you should read the
EXTENDED_SHUTTER register for the current active shutter time.
Changing the auto shutter range might not affect the regulation, if the reg-
ulation is in a stable condition and no other condition affecting the image
brightness is changed.
Register Name Field Bit Description
0xF1000360 AUTOSHUTTER_CTRL Presence_Inq [0] Indicates presence of this
feature (read only)
--- [1..31] Reserved
0xF1000364 AUTOSHUTTER_LO --- [0..5] Reserved
MinValue [6..31] Minimum auto shutter value
lowest possible value: 10 µs
0xF1000368 AUTOSHUTTER_HI --- [0..5] Reserved
MaxValue [6..31] Maximum auto shutter value
Table 130: Advanced register: Auto shutter control
Note
L
• Values can only be changed within the limits of shutter
CSR.
• Changes in auto exposure register only have an effect
when auto shutter is enabled.
• Auto exposure limits are: 50..205 (SmartViewCtrl1
tab: Target grey level)
- Technical Manual 1
- AVT Stingray 1
- Legal notice 2
- Contents 3
- Introduction 11
- Manual overview 14
- More information 17
- Before operation 17
- STINGRAY cameras 19
- Declarations of conformity 20
- FireWire 21
- FireWire in detail 22
- 1394b port 26
- 1394a camera 26
- 1394a port 26
- 1394b camera 26
- 1394b bandwidths 29
- Operating system support 35
- Filter and lenses 36
- Camera lenses 37
- Specifications 39
- STINGRAY F-046B/C (fiber) 41
- STINGRAY F-080B/C (fiber) 43
- STINGRAY F-145B/C (fiber) 45
- STINGRAY F-146B/C (fiber) 47
- STINGRAY F-201B/C (fiber) 49
- Spectral sensitivity 51
- Camera dimensions 57
- Tripod adapter 59
- Cross section: CS-Mount 68
- Cross section: C-Mount 69
- Stingray board level: C-Mount 73
- Camera interfaces 74
- Status LEDs 78
- Normal conditions 79
- Error conditions 79
- Stingray board level models) 90
- Pixel data 93
- Color cameras 97
- White balance 98
- Automatic white balance 101
- Auto shutter 102
- Auto gain 104
- Manual gain 107
- Horizontal mirror function 109
- Shading correction 110
- How to store shading image 111
- Output = f (Input) 117
- Vertical binning 121
- What is sub-sampling? 126
- Description of sub-sampling 126
- Description of the data path 130
- Why new timing modes? 134
- ☺ Disadvantage 136
- Packed 12-Bit Mode 139
- Deferred image transport 141
- HoldImg mode 142
- FastCapture mode 144
- Sharpness 147
- Hue and saturation 148
- Color correction 149
- Color conversion (RGB YUV) 151
- Bulk Trigger 151
- Level Trigger 151
- Serial interface 152
- Name Field Bit Description 153
- Controlling image capture 157
- Trigger delay 162
- Exposure time offset 164
- Minimum exposure time 165
- Extended shutter 165
- One-shot 167
- Exposure 169
- Multi-shot 170
- ISO_Enable / free-run 170
- Asynchronous broadcast 170
- Jitter at start of exposure 171
- Sequence mode 173
- SetupMode to 177
- Disable SetupMode 177
- SIS: Definition 182
- SIS: Scenarios 182
- Area of interest (AOI) 201
- Autofunction AOI 203
- Frame rates 204
- Frame rates Format_7 208
- Test images 217
- Test images for color cameras 218
- Configuration of the camera 219
- ADV_FNC_INQ 222
- Sample program 223
- Example FireStack API 224
- Configuration ROM 225
- 424h + 000004 x 4 = 434h 226
- 440h + 0000xx * 4 = 444h 226
- = value of directory entry 226
- 0-7 8-15 16-23 24-31 226
- Camera initialize register 228
- PIO_Control_Quadlet_Offset 241
- SIO_Control_Quadlet_Offset 241
- Strobe_Output_Quadlet_Offset 241
- Name Description 245
- Format_7 250
- Temperature register 252
- Advanced registers summary 253
- Advanced feature inquiry 258
- Camera status 260
- Maximum resolution 261
- Time base 261
- Look-up tables (LUT) 265
- [8..31] In bytes 268
- Frame information 272
- Input/output pin control 272
- Auto shutter control 274
- Auto gain control 275
- Mirror image 278
- Soft reset 279
- Maximum ISO packet size 281
- Parameter-List Update 285
- Format_7 mode mapping 286
- Secure image signature (SIS) 288
- Cycles Seconds 289
- Cycle count 290
- User profiles 293
- GPDATA_BUFFER 297
- Firmware update 298
- Appendix 299
- , 102, 104, 105, 107, 251 300
- , 115, 118 304
- , 184, 218 304
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