def test_jp2k_16b_regression(self):
"""
Regression test for 16b Jpeg 2K compressed image.
Read the block from a slide and compares it
with a reference image. The reference image
is obtained by reading of the same region
by the slideo and savint it as a tif file.
"""
# Image to test
image_path = get_test_image_path("svs", "jp2k_1chnl.svs")
# Image to test
reference_image_path = get_test_image_path(
"svs", "jp2k_1chnl.regression_x700_y400_w500_y400.tif")
# Read reference image
reference_image = cv.imread(reference_image_path, cv.IMREAD_UNCHANGED)
x_beg = 700
y_beg = 400
width = 500
height = 400
rect = (x_beg, y_beg, width, height)
new_size = (100, 80)
# open the slide
slide = slideio.open_slide(image_path, "SVS")
self.assertTrue(slide is not None)
scene = slide.get_scene(0)
self.assertTrue(scene is not None)
block_raster = scene.read_block(rect, size=new_size)
self.assertTrue(np.array_equal(block_raster, reference_image))
def test_jp2k_16b_read_block(self):
"""
Read a block of Jpeg2K compressed 16 bit image.
Reads a block from a slide and compares it
with a block exported by ImageScope software.
"""
# Image to test
image_path = get_test_image_path("svs", "jp2k_1chnl.svs")
# Image to test
reference_image_path = get_test_image_path(
"svs", "jp2k_1chnl.region_x700_y400_w500_y400.tif")
# Read reference image
reference_image = cv.imread(reference_image_path, cv.IMREAD_UNCHANGED)
x_beg = 700
y_beg = 400
width = 500
height = 400
# Read region with slideio
slide = slideio.open_slide(image_path, "SVS")
self.assertTrue(slide is not None)
scene = slide.get_scene(0)
self.assertTrue(scene is not None)
region = scene.read_block((x_beg, y_beg, width, height))
# call structural difference score
scores_cf = cv.matchTemplate(region.astype(np.float32),
reference_image.astype(np.float32),
cv.TM_CCOEFF_NORMED)[0][0]
# calculate square normed errors
scores_sq = cv.matchTemplate(region.astype(np.float32),
reference_image.astype(np.float32),
cv.TM_SQDIFF_NORMED)[0][0]
self.assertLess(0.99, scores_cf)
self.assertLess(scores_sq, 0.0002)
def test_jpegxr_rgb_resample_block(self):
"""
Read a block of rgb jpegxr compressed image.
Read the block from a slide and compares it
with a reference image.
"""
# Image to test
image_path = get_test_image_path("czi", "jxr-rgb-5scenes.czi")
# Reference channel images
ref_image_paths = get_test_image_path(
"czi",
"jxr-rgb-5scenes/jxr-rgb-5scenes_s3_x2500_y3000_w400_h600.png")
scaling_params = {1.0: 0.99, 1.5: 0.94, 2.0: 0.92, 3.0: 0.85}
reference_image = cv.imread(ref_image_paths)
slide = slideio.open_slide(image_path, "CZI")
scene = slide.get_scene(3)
# check accuracy of resizing for different scale coeeficients
for resize_cof, thresh in scaling_params.items():
new_size = (int(round(reference_image.shape[1] / resize_cof)),
int(round(reference_image.shape[0] // resize_cof)))
reference_raster = cv.resize(reference_image, new_size)
image_raster = scene.read_block((2500, 3000, 400, 600),
size=new_size,
channel_indices=[0, 1, 2])
scores_cf = cv.matchTemplate(reference_raster, image_raster,
cv.TM_CCOEFF_NORMED)[0][0]
self.assertLess(thresh, scores_cf)
def test_jp2k_16b_resample_block(self):
"""
Test for resampling of a 16bit block.
A region of 16 bit, jpeg 2000 compressed image is read
and resized with different scale.
An reference block is exportded by ImageScope software
on scale 1:1 and resized with opencv with the same
scale coefficients as the original region.
"""
# Image to test
image_path = get_test_image_path("svs", "jp2k_1chnl.svs")
# Image to test
reference_image_path = get_test_image_path(
"svs", "jp2k_1chnl.region_x700_y400_w500_y400.tif")
# Read reference image
reference_image = cv.imread(reference_image_path, cv.IMREAD_UNCHANGED)
x_beg = 700
y_beg = 400
width = 500
height = 400
rect = (x_beg, y_beg, width, height)
size = (width, height)
# open the slide
slide = slideio.open_slide(image_path, "SVS")
self.assertTrue(slide is not None)
scene = slide.get_scene(0)
self.assertTrue(scene is not None)
scaling_params = {
1.0: (0.9999, 2.e-7),
1.5: (0.99, 0.002),
2.0: (0.999, 1.e-7),
3.0: (0.98, 0.01),
5.0: (0.98, 0.01)
}
for resize_cof, params in scaling_params.items():
new_size = (int(round(size[0] / resize_cof)),
int(round(size[1] / resize_cof)))
resized_raster = scene.read_block(rect, size=new_size)
cv_resized_raster = cv.resize(reference_image, new_size)
# call structural difference score
score_cf = cv.matchTemplate(resized_raster.astype(np.float32),
cv_resized_raster.astype(np.float32),
cv.TM_CCOEFF_NORMED)[0][0]
# calculate square normed errors
score_sq = cv.matchTemplate(resized_raster.astype(np.float32),
cv_resized_raster.astype(np.float32),
cv.TM_SQDIFF_NORMED)[0][0]
self.assertLess(params[0], score_cf)
self.assertLess(score_sq, params[1])
def test_jpegxr_rgb_regression(self):
"""
Regression test for rgb jpegxr compressed image.
Read the block from a slide and compares it
with a reference image. The reference image
is obtained by reading of the same region
by the slideo and saving it as png file.
"""
image_name = "jxr-rgb-5scenes.czi"
folder = "czi"
driver = "CZI"
ext = ".png"
# Image to test
image_path = get_test_image_path(folder, image_name)
rect = (4000, 2000, 1000, 800)
new_size = (250, 200)
scene_index = 2
# export_image_region(folder,
# image_name, driver, scene_index,
# rect, new_size, ext
# )
slide = slideio.open_slide(image_path, driver)
scene = slide.get_scene(scene_index)
for channel_index in range(scene.num_channels):
image_raster = scene.read_block(rect,
new_size,
channel_indices=[channel_index])
regr_image_path = get_regression_image_path(
folder, image_name, scene_index, channel_index, rect, ext)
reference_image = cv.imread(regr_image_path, cv.IMREAD_UNCHANGED)
self.assertTrue(np.array_equal(image_raster, reference_image))
def test_jpegxr_16b_read_block(self):
"""
Read a block of jpegxr compressed 16 bit image.
Reads a block from a slide and compares it
with a block read by czifile package.
Small deviations can be explained by different
order in processing of tiles. Czi file contains
overlapped tiles. Rasters can be slightly different
in the overlapped areas (depends of tile order).
"""
# Image to test
image_path = get_test_image_path("czi", "jxr-16bit-4chnls.czi")
slide = slideio.open_slide(image_path, "CZI")
self.assertTrue(slide is not None)
scene = slide.get_scene(0)
self.assertTrue(scene is not None)
image_raster = scene.read_block()
reference_raster = np.transpose(
czi.imread(image_path)[0, 0, 0, :, :, :, 0], (1, 2, 0))
image_raster = image_raster[:, :, 0]
reference_raster = reference_raster[:, :, 0]
# calculate square normed errors
scores_sq = cv.matchTemplate(reference_raster.astype(np.float32),
image_raster.astype(np.float32),
cv.TM_SQDIFF_NORMED)[0][0]
# call structural difference score
scores_cf = cv.matchTemplate(reference_raster.astype(np.float32),
image_raster.astype(np.float32),
cv.TM_CCOEFF_NORMED)[0][0]
self.assertLess(0.99, scores_cf)
self.assertLess(scores_sq, 0.002)
def test_jpegxr_rgb_read_block(self):
"""
Read a block of rgb jpegxr compressed image.
Read the block from a slide and compares it
with a reference image.
"""
# Image to test
image_path = get_test_image_path("czi", "jxr-rgb-5scenes.czi")
# Reference channel images
ref_image_paths = get_test_image_path(
"czi",
"jxr-rgb-5scenes/jxr-rgb-5scenes_s3_x2500_y3000_w400_h600.png")
slide = slideio.open_slide(image_path, "CZI")
self.assertTrue(slide is not None)
scene = slide.get_scene(3)
self.assertTrue(scene is not None)
image_raster = scene.read_block((2500, 3000, 400, 600))
reference_raster = cv.imread(ref_image_paths, cv.IMREAD_UNCHANGED)
scores_cf = cv.matchTemplate(reference_raster, image_raster,
cv.TM_CCOEFF_NORMED)[0][0]
self.assertLess(0.99, scores_cf)
def test_jpegxr_rgb_regression_small(self):
"""
Regression test for rgb jpegxr compressed image.
Read the block from a slide and compares it
with a reference image. The reference image
is obtained by reading of the same region
by the slideo and saving it as png file.
Old version of the jpegxr codec delivered
corupted images for the scene 2 with low
scaling
"""
# Image to test
image_path = get_test_image_path("czi", "jxr-rgb-5scenes.czi")
# Reference channel images
ref_image_path = get_test_image_path(
"czi", "jxr-rgb-5scenes.czi.regression_s2.png")
reference_image = cv.imread(ref_image_path, cv.IMREAD_UNCHANGED)
slide = slideio.open_slide(image_path, "CZI")
scene = slide.get_scene(2)
# check accuracy of resizing for different scale coeeficients
image_raster = scene.read_block(size=(400, 0))
self.assertTrue(np.array_equal(image_raster, reference_image))
def test_jpegxr_16b_regression(self):
"""
Regression test for 16b jpegxr compressed image.
Read the block from a slide and compares it
with a reference image. The reference image
is obtained by reading of the same region
by the slideo and savint it as a tif file.
"""
# Image to test
image_path = get_test_image_path("czi", "jxr-16bit-4chnls-2.czi")
# Reference image
ref_image_path = get_test_image_path(
"czi", "jxr-16bit-4chnls-2/regression_x5000_y2000_w1000_h500.tif")
region_size = (1000, 500)
region_new_size = (300, 150)
region_rect = (5000, 2000, region_size[0], region_size[1])
slide = slideio.open_slide(image_path, "CZI")
self.assertTrue(slide is not None)
scene = slide.get_scene(0)
self.assertTrue(scene is not None)
image = scene.read_block(region_rect, size=region_new_size)
reference_image = cv.imread(ref_image_path, cv.IMREAD_UNCHANGED)
self.assertTrue(np.array_equal(image, reference_image))
def test_jpegxr_16b_resample_block(self):
"""
Test for resampling of a block.
A region of 16 bit, jpegxr compressed image is read
with 1:1 scale and resampled with different scales.
1:1 block is resized in memory by opencv and compared
with resampled region from slideio.
"""
# Image to test
image_path = get_test_image_path("czi", "jxr-16bit-4chnls-2.czi")
region_size = (1000, 500)
region_rect = (5000, 2000, region_size[0], region_size[1])
slide = slideio.open_slide(image_path, "CZI")
self.assertTrue(slide is not None)
scene = slide.get_scene(0)
self.assertTrue(scene is not None)
origin_raster = scene.read_block(region_rect)
scaling_params = {
1.0: (0.9999, 1.e-7),
1.5: (0.99, 0.0004),
2.0: (0.98, 0.0035),
3.0: (0.95, 0.007),
5.0: (0.95, 0.008)
}
for resize_cof, params in scaling_params.items():
new_size = (int(round(region_size[0] / resize_cof)),
int(round(region_size[1] / resize_cof)))
resized_raster = scene.read_block(region_rect, size=new_size)
cv_resized_raster = cv.resize(origin_raster, new_size)
# call structural difference score
scores_cf = cv.matchTemplate(resized_raster.astype(np.float32),
cv_resized_raster.astype(np.float32),
cv.TM_CCOEFF_NORMED)[0][0]
# calculate square normed errors
scores_sq = cv.matchTemplate(resized_raster.astype(np.float32),
cv_resized_raster.astype(np.float32),
cv.TM_SQDIFF_NORMED)[0][0]
self.assertLess(params[0], scores_cf)
self.assertLess(scores_sq, params[1])
