diff --git a/meshroom/nodes/aliceVision/LdrToHdrCalibration.py b/meshroom/nodes/aliceVision/LdrToHdrCalibration.py
new file mode 100644
index 00000000..e44e0010
--- /dev/null
+++ b/meshroom/nodes/aliceVision/LdrToHdrCalibration.py
@@ -0,0 +1,77 @@
+__version__ = "2.0"
+
+from meshroom.core import desc
+
+
+class LdrToHdrCalibration(desc.CommandLineNode):
+    commandLine = 'aliceVision_LdrToHdrCalibration {allParams}'
+    size = desc.DynamicNodeSize('input')
+    #parallelization = desc.Parallelization(blockSize=40)
+    #commandLineRange = '--rangeStart {rangeStart} --rangeSize {rangeBlockSize}'
+
+    documentation = '''
+    Calibrate LDR to HDR response curve from samples
+'''
+
+    inputs = [
+        desc.File(
+            name='input',
+            label='Input',
+            description='SfMData file.',
+            value='',
+            uid=[0],
+        ),
+        desc.File(
+            name='samples',
+            label='Samples folder',
+            description='Samples folder',
+            value=desc.Node.internalFolder,
+            uid=[0],
+        ),
+        desc.ChoiceParam(
+            name='calibrationMethod',
+            label='Calibration Method',
+            description="Method used for camera calibration \n"
+                        " * Linear: Disable the calibration and assumes a linear Camera Response Function. If images are encoded in a known colorspace (like sRGB for JPEG), the images will be automatically converted to linear. \n"
+                        " * Debevec: This is the standard method for HDR calibration. \n"
+                        " * Grossberg: Based on learned database of cameras, it allows to reduce the CRF to few parameters while keeping all the precision. \n"
+                        " * Laguerre: Simple but robust method estimating the minimal number of parameters. \n"
+                        " * Robertson: First method for HDR calibration in the literature. \n",
+            values=['linear', 'debevec', 'grossberg', 'laguerre'],
+            value='debevec',
+            exclusive=True,
+            uid=[0],
+        ),
+        desc.ChoiceParam(
+            name='calibrationWeight',
+            label='Calibration Weight',
+            description="Weight function used to calibrate camera response \n"
+                        " * default (automatically selected according to the calibrationMethod) \n"
+                        " * gaussian \n"
+                        " * triangle \n"
+                        " * plateau",
+            value='default',
+            values=['default', 'gaussian', 'triangle', 'plateau'],
+            exclusive=True,
+            uid=[0],
+        ),
+        desc.ChoiceParam(
+            name='verboseLevel',
+            label='Verbose Level',
+            description='verbosity level (fatal, error, warning, info, debug, trace).',
+            value='info',
+            values=['fatal', 'error', 'warning', 'info', 'debug', 'trace'],
+            exclusive=True,
+            uid=[],
+        )
+    ]
+
+    outputs = [
+       desc.File(
+            name='response',
+            label='Output response  File',
+            description='Path to the output response file',
+            value=desc.Node.internalFolder + 'response.csv',
+            uid=[],
+        )
+    ]
\ No newline at end of file
diff --git a/meshroom/nodes/aliceVision/LdrToHdrMerge.py b/meshroom/nodes/aliceVision/LdrToHdrMerge.py
new file mode 100644
index 00000000..ece13299
--- /dev/null
+++ b/meshroom/nodes/aliceVision/LdrToHdrMerge.py
@@ -0,0 +1,62 @@
+__version__ = "2.0"
+
+from meshroom.core import desc
+
+
+class LdrToHdrMerge(desc.CommandLineNode):
+    commandLine = 'aliceVision_LdrToHdrMerge {allParams}'
+    size = desc.DynamicNodeSize('input')
+    #parallelization = desc.Parallelization(blockSize=40)
+    #commandLineRange = '--rangeStart {rangeStart} --rangeSize {rangeBlockSize}'
+
+    documentation = '''
+    Calibrate LDR to HDR response curve from samples
+'''
+
+    inputs = [
+        desc.File(
+            name='input',
+            label='Input',
+            description='SfMData file.',
+            value='',
+            uid=[0],
+        ),
+        desc.File(
+            name='response',
+            label='Response file',
+            description='Response file',
+            value='',
+            uid=[0],
+        ),
+        desc.ChoiceParam(
+            name='fusionWeight',
+            label='Fusion Weight',
+            description="Weight function used to fuse all LDR images together:\n"
+                        " * gaussian \n"
+                        " * triangle \n"
+                        " * plateau",
+            value='gaussian',
+            values=['gaussian', 'triangle', 'plateau'],
+            exclusive=True,
+            uid=[0],
+        ),
+        desc.ChoiceParam(
+            name='verboseLevel',
+            label='Verbose Level',
+            description='verbosity level (fatal, error, warning, info, debug, trace).',
+            value='info',
+            values=['fatal', 'error', 'warning', 'info', 'debug', 'trace'],
+            exclusive=True,
+            uid=[],
+        )
+    ]
+
+    outputs = [
+        desc.File(
+            name='outSfMDataFilename',
+            label='Output SfMData File',
+            description='Path to the output sfmdata file',
+            value=desc.Node.internalFolder + 'sfmData.sfm',
+            uid=[],
+        )
+    ]
\ No newline at end of file
diff --git a/meshroom/nodes/aliceVision/LdrToHdrSampling.py b/meshroom/nodes/aliceVision/LdrToHdrSampling.py
new file mode 100644
index 00000000..4547a9d1
--- /dev/null
+++ b/meshroom/nodes/aliceVision/LdrToHdrSampling.py
@@ -0,0 +1,77 @@
+__version__ = "2.0"
+
+from meshroom.core import desc
+
+
+class LdrToHdrSampling(desc.CommandLineNode):
+    commandLine = 'aliceVision_LdrToHdrSampling {allParams}'
+    size = desc.DynamicNodeSize('input')
+    #parallelization = desc.Parallelization(blockSize=40)
+    #commandLineRange = '--rangeStart {rangeStart} --rangeSize {rangeBlockSize}'
+
+    documentation = '''
+    Sample pixels from Low range images for HDR creation
+'''
+
+    inputs = [
+        desc.File(
+            name='input',
+            label='Input',
+            description='SfMData file.',
+            value='',
+            uid=[0],
+        ),
+        desc.IntParam(
+            name='userNbBrackets',
+            label='Number of Brackets',
+            description='Number of exposure brackets per HDR image (0 for automatic detection).',
+            value=0,
+            range=(0, 15, 1),
+            uid=[0],
+            group='user',  # not used directly on the command line
+        ),
+        desc.IntParam(
+            name='nbBrackets',
+            label='Automatic Nb Brackets',
+            description='Number of exposure brackets used per HDR image. It is detected automatically from input Viewpoints metadata if "userNbBrackets" is 0, else it is equal to "userNbBrackets".',
+            value=0,
+            range=(0, 10, 1),
+            uid=[],
+        ),
+        desc.BoolParam(
+            name='byPass',
+            label='bypass convert',
+            description="Bypass HDR creation and use the medium bracket as the source for the next steps",
+            value=False,
+            uid=[0],
+            advanced=True,
+        ),
+        desc.IntParam(
+            name='channelQuantizationPower',
+            label='Channel Quantization Power',
+            description='Quantization level like 8 bits or 10 bits.',
+            value=10,
+            range=(8, 14, 1),
+            uid=[0],
+            advanced=True,
+        ),
+        desc.ChoiceParam(
+            name='verboseLevel',
+            label='Verbose Level',
+            description='verbosity level (fatal, error, warning, info, debug, trace).',
+            value='info',
+            values=['fatal', 'error', 'warning', 'info', 'debug', 'trace'],
+            exclusive=True,
+            uid=[],
+        )
+    ]
+
+    outputs = [
+        desc.File(
+            name='output',
+            label='Output Folder',
+            description='Output path for the samples.',
+            value=desc.Node.internalFolder,
+            uid=[],
+        ),
+    ]
\ No newline at end of file