def _value_function_handle(params: Dict[Enum, Parameter]) -> bool:
return ImageMethods.norm_rel_l2(
params[AngleSelectParams.ROT_TR_A_IMG].value,
params[AngleSelectParams.REF_IMG].value,
) <= ImageMethods.norm_rel_l2(
params[AngleSelectParams.ROT_TR_B_IMG].value,
params[AngleSelectParams.REF_IMG].value,
)
def test_compute_rts(self, retina, angle_scale_translation, expected_err,
rtol):
angle, scale, translation = angle_scale_translation
mod_img = ImageMethods.compute_rts(retina,
angle=angle,
scale=scale,
translation=translation)
rec_img = ImageMethods.compute_rts(mod_img,
angle=angle,
scale=scale,
translation=translation,
inverse=True)
assert m.isclose(np.linalg.norm(retina - rec_img),
expected_err,
rel_tol=rtol)
def image_save_back_tf(rot_tr_arr: np.ndarray, fnames: Sequence[str],
src_path: str, dest_path: str):
"""
Creates backtransformed images
For an external program that compares images `*_A.*` with `*_B.*` this prepares images
such that::
test00001.jpg -> test00001_A.png
test00021.jpg -> TR -> test00001_B.png, test00021_A.png
test00221.jpg -> TR -> test00201_B.png, test00221_A.png
test00241.jpg -> TR -> test00221_B.png
where TR denotes the backtransformation.
"""
for i, fname in enumerate(fnames):
if i == 0:
pass
src_arr = np.array(Image.open(src_path + "/" + fname))
dest_arr = ImageMethods.compute_rts(
src_arr,
angle=rot_tr_arr[i][3],
translation=rot_tr_arr[i][:2],
inverse=True,
)
dest_img = Image.fromarray(dest_arr).convert("L")
if i != len(fnames) - 1:
out_a = dest_path + "/" + fname.split(".")[0] + "_A.png"
dest_img.save(out_a)
if i != 0:
out_b = dest_path + "/" + fnames[i - 1].split(".")[0] + "_B.png"
dest_img.save(out_b)
def _value_function_handle(params: Dict[Enum, Parameter]) -> np.ndarray:
return ImageMethods.compute_rts(
params[LogPolParams.MOD_IMG].value,
angle=params[LogPolParams.RECOVERED_ROTATION].value[0],
scale=params[LogPolParams.RECOVERED_SCALE].value[0],
translation=params[LogPolParams.RECOVERED_TRANSLATION].value[:-1],
inverse=True,
)
def _calculate_gaussdiff(image_type: Enum,
params: Dict[Enum, Parameter]) -> np.ndarray:
return ImageMethods.compute_dgfw(
params[image_type].value,
params[LogPolParams.GAUSS_DIFF].value,
params[LogPolParams.WINDOW_WEIGHT].value,
params[LogPolParams.WINDOW_TYPE].value,
)
def _value_function_handle(params: Dict[Enum, Parameter]) -> np.ndarray:
return ImageMethods.compute_rts(
params[AngleSelectParams.IMG].value,
angle=params[AngleSelectParams.ANGLE_B].value,
scale=1,
translation=params[AngleSelectParams.TRANSLATION_B].value[:-1],
inverse=True,
preserve_range=True,
)
def _value_function_handle(
params: Dict[Enum, Parameter]
) -> Tuple[np.ndarray, np.ndarray, Dict[str, Hashable]]:
return ImageMethods.recover_rs(
params[LogPolParams.WARPED_FOURIER_REF_IMG].value,
params[LogPolParams.WARPED_FOURIER_MOD_IMG].value,
params[LogPolParams.REF_IMG].value.shape,
params[LogPolParams.UPSAMPLING].value,
params[LogPolParams.WINDOW_RADIUS_EXP].value,
)
def _value_function_handle(params: Dict[Enum, Parameter]) -> np.ndarray:
return np.array([
ImageMethods.max_sinogram_angle(
params[RadonParams.MOD_IMG].value,
theta=params[RadonParams.THETA].value,
exp_filter_val=params[
RadonParams.EXPONENTIAL_FILTER_SIGNAL_NOISE].value,
precision=params[RadonParams.ANGULAR_PRECISION].value,
),
params[RadonParams.ANGULAR_PRECISION].value,
])
def _value_function_handle(
params: Dict[Enum, Parameter]) -> Tuple[int, int, int, int]:
image = params[LogPolParams.REF_IMG].value
wrexp = params[LogPolParams.WINDOW_RADIUS_EXP].value
warp_radius = ImageMethods.compute_warp_radius(min(image.shape), wrexp)
center = np.array(image.shape) // 2
r_lower, r_upper = (
center[0] - warp_radius,
center[0] + warp_radius,
)
c_lower, c_upper = (
center[1] - warp_radius,
center[1] + warp_radius,
)
return (r_lower, r_upper, c_lower, c_upper)
def rot_tr_gen(solvers: Iterable[Solver]) -> Generator[np.ndarray, None, None]:
"""
Sweep over solver instances and return `tr_x` `tr_y` `tr_err` `rot` `rot_err` `NormRel_L2`
Parameters
----------
solvers : Iterable
An iterable of solver instances
"""
for solv in solvers:
yield np.array((
*solv.RECOVERED_TRANSLATION.value,
*solv.RECOVERED_ROTATION.value,
ImageMethods.norm_rel_l2(solv.RECOVERED_ROT_TR_IMG.value,
solv.REF_IMG.value),
))
def rot_scale_tr_gen(
solvers: Iterable[Solver]) -> Generator[np.ndarray, None, None]:
"""
Sweep over solver instances and return the rotations, scales and translations
Parameters
----------
solvers : Iterable
An iterable of solver instances
Returns
-------
np.array
Containing `tr_x` `tr_y` `tr_err` `rot` `rot_err` `scale` `scale_err` `NormRel_L2`
"""
for solv in solvers:
yield np.array((
*solv.RECOVERED_TRANSLATION.value,
*solv.RECOVERED_ROTATION.value,
*solv.RECOVERED_SCALE.value,
ImageMethods.norm_rel_l2(solv.RECOVERED_ROT_SCALE_TR_IMG.value,
solv.REF_IMG.value),
))
def _value_function_handle(params: Dict[Enum, Parameter]) -> np.ndarray:
return ImageMethods.compute_log_polar_tf(
params[LogPolParams.FOURIER_MOD_IMG].value,
params[LogPolParams.WINDOW_RADIUS_EXP].value,
)
import numpy as np import matplotlib.pyplot as plt import imgreg.data as data from imgreg.util.methods import ImageMethods img = np.array(data.mod_img()) # Compute the sinogram using the radon transform sinogram = ImageMethods.sinogram(img) plt.imshow(sinogram, aspect=0.1) plt.show() # Compute the same sinogram but apply an exponential weighting filter sinogram = ImageMethods.sinogram(img, exp_filter_val=1000) plt.imshow(sinogram, aspect=0.1) plt.show()
def _value_function_handle(params: Dict[Enum, Parameter]) -> np.ndarray:
return ImageMethods.abs_diff(
params[ValidatorParams.IMG].value,
params[ValidatorParams.REF_IMG].value,
)
def _value_function_handle(params: Dict[Enum, Parameter]) -> float:
return ImageMethods.norm_rel_l2(
params[ValidatorParams.IMG].value,
params[ValidatorParams.REF_IMG].value,
)
def _value_function_handle(params: Dict[Enum, Parameter]) -> np.ndarray:
return ImageMethods.compute_afts(
params[LogPolParams.GAUSS_DIFF_MOD_IMG].value)
import numpy as np import imgreg.data as data from imgreg.models.validator import Validator from imgreg.util.methods import ImageMethods ref_img = np.array(data.ref_img()) # modify the image using an affine transformation img = ImageMethods.compute_rts(ref_img, angle=2, translation=(6, 2)) # Create the model: val = Validator(img, ref_img) # The ImageParameters of the model have matplotlib support via the display function: val.display([val.ABSOLUTE_DIFFERENCE_IMG, val.SQUARED_DIFFERENCE_IMG]) # Increase the overlap to the reference image val.IMG.value = ImageMethods.compute_rts(ref_img, angle=1, translation=(1, 2)) # Note how the difference images show less pronounced differences with increased overlap val.display([val.ABSOLUTE_DIFFERENCE_IMG, val.SQUARED_DIFFERENCE_IMG])
def request_rts(request, ref_image):
angle, translation = request.param
return ImageMethods.compute_rts(ref_image,
angle=angle,
translation=translation)
