Noa

configs/benchmark_hyperspectral.yaml

@@ -0,0 +1,114 @@
+# python scripts/eval/benchmark_recon.py
+#Hydra config
+hydra:
+  run:
+    dir: "benchmark/${now:%Y-%m-%d}/${now:%H-%M-%S}"
+  job:
+    chdir: True
+
+
+dataset: PolarLitis   # DiffuserCam, DigiCamCelebA, HFDataset
+seed: 0
+batchsize: 1    # must be 1 for iterative approaches
+
+huggingface:
+  repo: "noakraicer/polarlitisnpy"
+  cache_dir: null    # where to read/write dataset. Defaults to `"~/.cache/huggingface/datasets"`.
+  psf: psf.mat 
+  mask: mask.npy  # null for simulating PSF
+  image_res: [250, 250]  # used during measurement
+  rotate: False   # if measurement is upside-down
+  flipud: False
+  flip_lensed: False   # if rotate or flipud is True, apply to lensed
+
+  alignment:
+    top_left: null
+    height: null
+
+  downsample: 1
+  downsample_lensed: 2
+  split_seed: null
+  single_channel_psf: True
+
+device: "cuda"
+# numbers of iterations to benchmark
+n_iter_range: [2000]
+# number of files to benchmark
+n_files: null    # null for all files
+#How much should the image be downsampled
+downsample: 2
+#algorithm to benchmark
+algorithms: ["HyperSpectralFISTA"] #["ADMM", "ADMM_Monakhova2019", "FISTA", "GradientDescent", "NesterovGradientDescent"]
+
+# baseline from Monakhova et al. 2019, https://arxiv.org/abs/1908.11502
+baseline: "MONAKHOVA 100iter"
+
+save_idx: [0, 1, 2, 3, 4]   # provide index of files to save e.g. [1, 5, 10]
+gamma_psf: 1.5    # gamma factor for PSF
+
+
+# Hyperparameters
+nesterov:
+  p: 0
+  mu: 0.9
+fista:
+  tk: 1
+admm:
+  mu1: 1e-6
+  mu2: 1e-5
+  mu3: 4e-5
+  tau: 0.0001
+
+
+# for DigiCamCelebA
+files:
+  test_size: 0.15
+  downsample: 1
+  celeba_root: /scratch/bezzam
+
+
+  # dataset: /scratch/bezzam/celeba_adafruit_random_2mm_20230720_10K
+  # psf: data/psf/adafruit_random_2mm_20231907.png
+  # vertical_shift: null
+  # horizontal_shift: null
+  # crop: null
+
+  dataset: /scratch/bezzam/celeba/celeba_adafruit_random_30cm_2mm_20231004_26K
+  psf: rpi_hq_adafruit_psf_2mm/raw_data_rgb.png
+  vertical_shift: -117
+  horizontal_shift: -25
+  crop:
+    vertical: [0, 525]
+    horizontal: [265, 695]
+
+# for prepping ground truth data
+#for simulated dataset
+simulation:
+  grayscale: False
+  output_dim: null     # should be set if no PSF is used    
+  # random variations
+  object_height: 0.33   # [m], range for random height or scalar
+  flip: True # change the orientation of the object (from vertical to horizontal)
+  random_shift: False
+  random_vflip: 0.5
+  random_hflip: 0.5
+  random_rotate: False
+  # these distance parameters are typically fixed for a given PSF
+  # for DiffuserCam psf # for tape_rgb psf     
+  # scene2mask: 10e-2     # scene2mask: 40e-2       
+  # mask2sensor: 9e-3     # mask2sensor: 4e-3  
+  # -- for CelebA
+  scene2mask: 0.25   # [m]
+  mask2sensor: 0.002   # [m] 
+  deadspace: True    # whether to account for deadspace for programmable mask      
+  # see waveprop.devices
+  use_waveprop: False    # for PSF simulation
+  sensor: "rpi_hq"
+  snr_db: 10
+  # simulate different sensor resolution
+  # output_dim: [24, 32]    # [H, W] or null
+  # Downsampling for PSF
+  downsample: 8
+  # max val in simulated measured (quantized 8 bits)
+  quantize: False   # must be False for differentiability
+  max_val: 255

lensless/__init__.py

@@ -20,6 +20,7 @@
     NesterovGradientDescent,
     FISTA,
     GradientDescentUpdate,
+    HyperSpectralFISTA
 )
 from .recon.tikhonov import CodedApertureReconstruction
 from .hardware.sensor import VirtualSensor, SensorOptions

lensless/recon/gd.py

@@ -64,7 +64,7 @@ class GradientDescent(ReconstructionAlgorithm):
     Object for applying projected gradient descent.
     """
 
-    def __init__(self, psf, dtype=None, proj=non_neg, **kwargs):
+    def __init__(self, psf,mask, dtype=None, proj=non_neg, **kwargs):
         """
 
         Parameters
@@ -83,30 +83,30 @@ def __init__(self, psf, dtype=None, proj=non_neg, **kwargs):
 
         assert callable(proj)
         self._proj = proj
-        super(GradientDescent, self).__init__(psf, dtype, **kwargs)
+        super(GradientDescent, self).__init__(psf,mask, dtype, **kwargs)
 
         if self._denoiser is not None:
             print("Using denoiser in gradient descent.")
             # redefine projection function
             self._proj = self._denoiser
-
+        self.mask=mask
     def reset(self):
         if self.is_torch:
             if self._initial_est is not None:
                 self._image_est = self._initial_est
             else:
                 # initial guess, half intensity image
-                psf_flat = self._psf.reshape(-1, self._psf_shape[3])
-                pixel_start = (
-                    torch.max(psf_flat, axis=0).values + torch.min(psf_flat, axis=0).values
-                ) / 2
+                # psf_flat = self._psf.reshape(-1, self._psf_shape[3])
+                # pixel_start = (
+                #     torch.max(psf_flat, axis=0).values + torch.min(psf_flat, axis=0).values
+                # ) / 2
                 # initialize image estimate as [Batch, Depth, Height, Width, Channels]
-                self._image_est = torch.ones_like(self._psf[None, ...]) * pixel_start
+                self._image_est = torch.zeros((1,250,250,3)).to(self._psf.device)
 
             # set step size as < 2 / lipschitz
             Hadj_flat = self._convolver._Hadj.reshape(-1, self._psf_shape[3])
             H_flat = self._convolver._H.reshape(-1, self._psf_shape[3])
-            self._alpha = torch.real(1.8 / torch.max(torch.abs(Hadj_flat * H_flat), axis=0).values)
+            self._alpha = 1/4770.13
 
         else:
             if self._initial_est is not None:
@@ -123,8 +123,8 @@ def reset(self):
             self._alpha = np.real(1.8 / np.max(Hadj_flat * H_flat, axis=0))
 
     def _grad(self):
-        diff = self._convolver.convolve(self._image_est) - self._data
-        return self._convolver.deconvolve(diff)
+        diff = torch.sum(self.mask * self._convolver.convolve(self._image_est),  axis=-1, keepdims=True) - self._data  # (H, W, 1)
+        return self._convolver.deconvolve(diff * self.mask)  # (H, W, C) where C is number of hyperspectral channels
 
     def _update(self, iter):
         self._image_est -= self._alpha * self._grad()
@@ -238,6 +238,78 @@ def _update(self, iter):
         self._xk = xk
 
 
+def apply_gradient_descent(psf_fp, data_fp, n_iter, verbose=False, proj=non_neg, **kwargs):
+
+    # load data
+    psf, data = load_data(psf_fp=psf_fp, data_fp=data_fp, plot=False, **kwargs)
+
+    # create reconstruction object
+    recon = GradientDescent(psf, n_iter=n_iter, proj=proj)
+
+    # set data
+    recon.set_data(data)
+
+    # perform reconstruction
+    start_time = time.time()
+    res = recon.apply(plot=False)
+    proc_time = time.time() - start_time
+
+    if verbose:
+        print(f"Reconstruction time : {proc_time} s")
+        print(f"Reconstruction shape: {res.shape}")
+    return res
+class HyperSpectralFISTA(GradientDescent):
+    """
+    Object for applying projected gradient descent with FISTA (Fast Iterative
+    Shrinkage-Thresholding Algorithm) for acceleration.
+
+    Paper: https://www.ceremade.dauphine.fr/~carlier/FISTA
+
+    """
+
+    def __init__(self, psf,mask, dtype=None, proj=non_neg, tk=1.0, **kwargs):
+        """
+
+        Parameters
+        ----------
+        psf : :py:class:`~numpy.ndarray` or :py:class:`~torch.Tensor`
+            Point spread function (PSF) that models forward propagation.
+            Must be of shape (depth, height, width, channels) even if
+            depth = 1 and channels = 1. You can use :py:func:`~lensless.io.load_psf`
+            to load a PSF from a file such that it is in the correct format.
+        dtype : float32 or float64
+            Data type to use for optimization. Default is float32.
+        proj : :py:class:`function`
+            Projection function to apply at each iteration. Default is
+            non-negative.
+        tk : float
+            Initial step size parameter for FISTA. It is updated at each iteration
+            according to Eq. 4.2 of paper. By default, initialized to 1.0.
+
+        """
+        self._initial_tk = tk
+
+        super(HyperSpectralFISTA, self).__init__(psf,mask, dtype, proj, **kwargs)
+
+        self._tk = tk
+        self._xk = self._image_est
+
+    def reset(self, tk=None):
+        super(HyperSpectralFISTA, self).reset()
+        if tk:
+            self._tk = tk
+        else:
+            self._tk = self._initial_tk
+        self._xk = self._image_est
+    def _update(self, iter):
+        self._image_est -= self._alpha * self._grad()
+        xk = self._form_image()
+        tk = (1 + np.sqrt(1 + 4 * self._tk**2)) / 2
+        self._image_est = xk + (self._tk - 1) / tk * (xk - self._xk)
+        self._tk = tk
+        self._xk = xk
+
+
 def apply_gradient_descent(psf_fp, data_fp, n_iter, verbose=False, proj=non_neg, **kwargs):
 
     # load data

lensless/recon/recon.py

@@ -203,6 +203,7 @@ class ReconstructionAlgorithm(abc.ABC):
     def __init__(
         self,
         psf,
+        mask,
         dtype=None,
         pad=True,
         n_iter=100,
@@ -369,12 +370,13 @@ def set_data(self, data):
         assert len(data.shape) >= 3, "Data must be at least 3D: [..., width, height, channel]."
 
         # assert same shapes
-        assert np.all(
-            self._psf_shape[-3:-1] == np.array(data.shape)[-3:-1]
-        ), "PSF and data shape mismatch"
-
-        if len(data.shape) == 3:
-            self._data = data[None, None, ...]
+        # assert np.all(
+        #     self._psf_shape[-3:-1] == np.array(data.shape)[-3:-1]
+        # ), "PSF and data shape mismatch"
+        if len(data.shape)==3:
+              self._data =  data.unsqueeze(-1)
+        # if len(data.shape) == 3:
+        #     self._data = data[None, None, ...]
         elif len(data.shape) == 4:
             self._data = data[None, ...]
         else:
@@ -569,6 +571,9 @@ def apply(
 
         for i in range(n_iter):
             self._update(i)
+            if i%50==0:
+                img = self._form_image()
+
             if self.compensation_branch is not None and i < self._n_iter - 1:
                 self.compensation_branch_inputs.append(self._form_image())
 

lensless/recon/rfft_convolve.py

@@ -24,7 +24,7 @@
 
 
 class RealFFTConvolve2D:
-    def __init__(self, psf, dtype=None, pad=True, norm="ortho", rgb=None, **kwargs):
+    def __init__(self, psf, dtype=None, pad=True, norm=None, rgb=None, **kwargs):
         """
         Linear operator that performs convolution in Fourier domain, and assumes
         real-valued signals.
@@ -135,10 +135,10 @@ def convolve(self, x):
         Convolve with pre-computed FFT of provided PSF.
         """
         if self.pad:
-            self._padded_data = self._pad(x)
+            self._padded_data = self._pad(x).to(self._psf.device)
         else:
             if self.is_torch:
-                self._padded_data = x  # .type(self.dtype).to(self._psf.device)
+                self._padded_data = x
             else:
                 self._padded_data[:] = x  # .astype(self.dtype)