Allied Vision Technologies Guppy Manuel d'instructions Page 130
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- Table des matières
- MARQUE LIVRES
Noté. / 5. Basé sur avis des utilisateurs
Guppy Technical ManualV7.4.0
130
Description of the data path
Pixel operations in detail
The following diagrams show the principle of the pixel operations:
1. Exposure start: By starting the exposure the charge in the pixel is flushed
through a reset mechanism. Exposure starts and charge accumulates in the
pixel. At this time, the charge from the previous frame is on the storage
node and is being read out. The storage control is at 0 V.
2. Storage control gate open: When the previous frame’s charge is read out
of the storage node, the storage control gate is opened and the saturation
control gate is adjusted to level V1. Any charge that is already accumulated
above this level is spilled out to V
AA
.
3. Final steps: After time Shutter Width 1, the saturation control gate is
adjusted to level V2, thus allowing further charge to accumulate or spill
out if it exceeds the level set by V2. After time Shutter Width 2, the gate is
further adjusted to voltage level V3. Finally after time Total Shutter Width,
the storage control is closed. All the charge on the storage node is iso-
lated. This will be read out during the following frame integration time.
Note
• Linear response causes loss of high-intensity detail in
the saturation region.
• Piece-wise linear response causes compression of high-
intensity detail (region after first and second knee
point). But there is an increased scene dynamic.
Figure 84: Details of pixel operations
Note
In the so-called auto knee-adjust mode Shutter Width 1+2 and
Total Shutter are controlled automatically.
Storage
control
Saturation
control
V
AA
Readout
0 V
0.5 V
2.5 V
3.3 V
Storage
control
Saturation
control
V
AA
Readout
Any excess
charge is
0 V
0.5 V
2.5 V
3.3 V
Charge from
previous frame
Storage
control
Saturation
control
V
AA
Readout
0 V
0.5 V
2.5 V
3.3 V
Storage
node
Storage
node
Storage
node
spilled out
V1
V2
V3
1. Exposure start 2. Storage control gate open 3. Final steps
- Technical Manual 1
- Legal notice 2
- Contacting Allied Vision 9
- Introduction 10
- Manual overview 21
- More information 23
- Before operation 23
- Guppy cameras 25
- Conformity 26
- Specifications 27
- Guppy F-036B/C 28
- Guppy F-038B/C 30
- Guppy F-038B/C NIR 31
- Guppy F-044B/C 32
- Guppy F-044B/C NIR 33
- Guppy F-046B/C 34
- Guppy F-080B/C 35
- Table 10: Guppy F-080B/C 36
- Guppy F-146B/C 37
- Guppy F-503B/C 38
- Spectral sensitivity 39
- Cyan Green Yellow Magenta 43
- Camera dimensions 50
- Mass: 50 g (without lens) 51
- Tripod adapter 52
- Cross section: C-Mount 53
- Cross section: CS-Mount 54
- Filter and lenses 55
- Camera lenses 56
- Camera interfaces 58
- Guppy (housing) 59
- Status LEDs 60
- on page 156 69
- Delay set by register 69
- Pixel data 70
- Description of the data path 75
- Color cameras (CCD and CMOS) 77
- (Format_7 Mode_0) 79
- (Format_7 Mode_1) 81
- 2nd field 83
- (only Guppy F-036/F-503) 90
- White balance 90
- Voltage (Reg0x48 or 92
- ADC Data 92
- One-push white balance 95
- Auto white balance (AWB) 96
- Manual gain 98
- Auto gain 100
- Guppy Technical ManualV7.4.0 101
- Auto shutter 104
- Building defect pixel data 110
- DPC data: storing mechanism 112
- Binning 113
- Description of sub-sampling 120
- What is sub-sampling? 120
- (only Guppy F-503) 125
- Packed 12-Bit Mode 128
- HDR overview (HiDy sensor) 129
- Pixel operations in detail 130
- Effects of a HiDy sensor 132
- Serial interface 136
- Name Field Bit Description 137
- Controlling image capture 141
- Trigger modes 144
- Trigger_Mode_1 (level mode) 145
- Trigger delay 152
- Exposure time offset 156
- Extended shutter 157
- One-Shot 158
- Multi-shot 160
- ISO_Enable / free-run 161
- Asynchronous broadcast 161
- Jitter at start of exposure 162
- User profiles 163
- Guppy F-033B / Guppy F-033C 165
- Guppy F-036B / Guppy F-036C 166
- Guppy F-038B / Guppy F-038C 167
- Guppy F-044B / Guppy F-044C 168
- Guppy F-046B / Guppy F-046C 169
- Guppy F-080B / Guppy F-080C 170
- Guppy F-146B / Guppy F-146C 171
- Guppy F-503B / Guppy F-503C 172
- Area of interest (AOI) 174
- Frame rates 177
- Frame rates Format_7 178
- Test images 195
- Test images for color cameras 196
- Configuration of the camera 198
- Sample program 200
- Configuration ROM 201
- 0-7 8-15 16-23 24-31 202
- Camera initialize register 204
- Name Notes 221
- Format_7 226
- Advanced registers summary 228
- Advanced feature inquiry 233
- Camera status 235
- Maximum resolution 236
- Time base 236
- Look-up tables (LUT) 240
- Frame information 242
- Input/output pin control 245
- Auto shutter control 246
- Auto gain control 247
- Autofunction AOI 248
- Soft reset 250
- Global reset release shutter 257
- GPDATA_BUFFER 257
- Firmware update 259
- Appendix 260
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