Table of Contents
- CoefficientBuffer
- FrameBufferMultiRoiDyn
- FrameBufferRandomRead
- FrameBufferRandomRead (imaFlex)
- FrameMemory
- FrameMemoryRandomRd
- ImageBuffer
- ImageBufferMultiRoI
- ImageBufferMultiRoIDyn
- ImageBufferSC
- ImageBufferSpatial
- ImageFifo
- ImageSequence
- KneeLUT
- LineBuffer (imaFlex)
- LineMemory
- LineMemoryRandomRd
- LUT
- RamLUT
- RamLUT (imaFlex)
- ROM
The Memory library includes operators for buffering data, resorting data, and random access to data. Many different operators exist. They all implement their own idea of memory access.
The operators are either using frame grabber RAM (DRAM), FPGA-internal block RAM (BRAM or URAM), or FPGA distributed RAM (LUT RAM). The following table shows an overview of which memory type is used by the individual operators.
| Name | Memory Type |
|---|---|
| CoefficientBuffer | Frame grabber RAM (DRAM) |
| FrameBufferMultiRoiDyn | Frame grabber RAM (DRAM) |
| FrameBufferRandomRead | Frame grabber RAM (DRAM) |
| FrameMemory | FPGA-internal block RAM |
| FrameMemoryRandomRd | FPGA-internal block RAM |
| ImageBuffer | Frame grabber RAM (DRAM) |
| ImageBufferMultiRoI | Frame grabber RAM (DRAM) |
| ImageBufferMultiRoIDyn | Frame grabber RAM (DRAM) |
| ImageBufferSC | Frame grabber RAM (DRAM) |
| ImageBufferSpatial | Frame grabber RAM (DRAM) |
| ImageFifo | FPGA-internal RAM |
| ImageSequence | Frame grabber RAM (DRAM) |
| KneeLUT | FPGA-internal block RAM |
| LineBuffer | Frame grabber RAM (DRAM) |
| LineMemory | FPGA-internal RAM |
| LineMemoryRandomRd | FPGA-internal block RAM |
| LUT | FPGA-internal block RAM |
| RamLUT | Frame grabber RAM (DRAM) |
| ROM | FPGA-internal block RAM |
Table 42. Memory Types of Operators in the Library Memory
Operators might require additional FPGA-internal RAM for buffering even if they are using frame grabber RAM (DRAM).
The delay, i.e., latency of a memory operator, depends on the operator's implementation. Some operators only have a short pixel delay, while others have a line or frame delay. The following table lists the delay of the individual memory operators.
| Name | Latency |
|---|---|
| CoefficientBuffer | None: Will always output data if output is not blocked. |
| FrameBufferMultiRoiDyn | Minimum 1 frame: Reading using coordinate inputs starts after frame has been fully written into the buffer. If output is blocked, operator buffers input data. |
| FrameBufferRandomRead | Minimum 1 frame: As soon as frame is fully written reading starts using address inputs. If output is blocked, operator buffers input data. Latency also depends on presence of read address data. |
| FrameMemory | 1 frame: Reading starts after frame has been fully written into the buffer. |
| FrameMemoryRandomRd | 1 frame: Reading can start after frame has been fully written into the buffer. Latency depends on presence of read address data. |
| ImageBuffer | Minimum 1 line: Output starts reading a line as soon as it is fully written into the buffer. If output is blocked, operator buffers input data. |
| ImageBufferMultiRoI | Minimum 1 frame: Reading starts after frame has been fully written into the buffer. If output is blocked, operator buffers input data. |
| ImageBufferMultiRoIDyn | Minimum 1 frame: Reading using coordinate inputs starts after frame has been fully written into the buffer. If output is blocked, operator buffers input data. |
| ImageBufferSC | Minimum 1 line: Output starts reading a line as soon as it is fully written into the buffer. If output is blocked, operator buffers input data. |
| ImageBufferSpatial | Minimum 1 line: Output starts reading a line as soon as it is fully written into the buffer. If output is blocked, operator buffers input data. |
| ImageFifo | No latency. Only if output is blocked, operator buffers and delays input data. |
| ImageSequence | Minimum SequenceLength frames: Reading starts after all frames of a sequence have been fully written into the buffer. If output is blocked, operator buffers input data. |
| KneeLUT | No latency |
| LineBuffer | 1 line: Reading starts after line has been fully written into the buffer. |
| LineMemory | 1 line: Reading starts after line has been fully written into the buffer. |
| LineMemoryRandomRd | 1 line: Reading can start after line has been fully written into the buffer. Latency depends on presence of read address data. |
| LUT | No latency |
| RamLUT | Latency of some clock cycles only. Depends on addresses. |
| ROM | No Latency |
Table 43. Individual Latencies of the Operators in Library Memory
The following list summarizes all Operators of Library Memory
| Operator Name | Short Description | available since | |
|---|---|---|---|
 |
CoefficientBuffer |
Allows the upload of image files from PC to frame grabber and uses them as image source. |
Version 1.1 |
 |
FrameBufferMultiRoiDyn |
Buffers the input images in the Frame Grabber RAM (DRAM) and reads out multiple dynamic regions of interest (ROI) for each buffered image. |
Version 3.5 |
 |
FrameBufferRandomRead |
FrameBufferRandomRead is a memory buffer with random read access. |
Version 1.3 |
 |
FrameBufferRandomRead (imaFlex) |
FrameBufferRandomRead (imaFlex) is a memory buffer for the imaFlex CXP-12 Quad and the imaFlex CXP-12 Penta platforms with random read access. |
Version 3.3 |
 |
FrameMemory |
FrameMemory is a small memory block with random write access. |
Version 1.1 |
 |
FrameMemoryRandomRd |
FrameMemoryRandomRd is a small memory block with random read access. |
Version 1.3 |
 |
ImageBuffer |
Buffers an image in Frame Grabber RAM (DRAM) with ROI selection. |
Version 1.1 |
 |
ImageBufferMultiRoI |
Buffers the input image stream in Frame Grabber RAM (DRAM) and outputs an arbitrary number of ROIs from each input image. |
Version 1.1 |
 |
ImageBufferMultiRoIDyn |
Buffers the input images in Frame Grabber RAM (DRAM) and transfers an arbitrary number of dynamic ROIs out of each image. |
Version 1.1 |
 |
ImageBufferSC |
Buffers an image in Frame Grabber RAM (DRAM) with sensor correction and ROI selection. |
Version 1.1 |
 |
ImageBufferSpatial |
Buffers the image in the Frame Grabber RAM (DRAM) and computes a spatial correction of lines. |
Version 1.3 |
 |
ImageFifo |
Buffers a limited number of pixels in the FPGA internal RAM. |
Version 1.1 |
 |
ImageSequence |
Buffers a sequence of images and output them simultaneously. |
Version 1.1 |
 |
KneeLUT |
Implements an approximation of a Lookup table by a series of nodes. |
Version 1.1 |
 |
LineBuffer (imaFlex) |
Buffers image data line-by-line in the Frame Grabber RAM (DRAM) with region-of-interest (ROI) support. This operator is only available for the imaFlex CXP-12 Quad and the imaFlex CXP-12 Penta platform. |
Version 3.3 |
 |
LineMemory |
LineMemory is a small memory block with random write access. |
Version 1.1 |
 |
LineMemoryRandomRd |
LineMemoryRandomRd is a small memory block with random read access. |
Version 1.3 |
 |
LUT |
Implements a Lookup table of dynamic content. |
Version 1.1 |
 |
RamLUT |
Implements a large lookup table of dynamic content based on FPGA-external RAM (i.e., the Frame Grabber RAM (DRAM)). |
Version 1.3 |
 |
RamLUT (imaFlex) |
Implements a large lookup table of dynamic content based on FPGA-external RAM. |
Version 3.3 |
 |
ROM |
Implements a Lookup table of dynamic content. |
Version 1.1 |
Table 44. Operators of Library Memory
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