Draw

draw_circle

paz.backend.image.draw.draw_circle(image, center, color=(0, 255, 0), radius=5)

Draw a circle in an image

Arguments

image: Array (H, W, 3)
center: List (2) with (x, y) values in openCV coordinates.
radius: Float. Radius of circle.
color: Tuple (3) indicating the RGB colors.

Returns

Array (H, W, 3) with circle.

[source]

draw_square

paz.backend.image.draw.draw_square(image, center, color, size)

Draw a square in an image

Arguments

image: Array (H, W, 3)
center: List (2) with (x, y) values in openCV coordinates.
size: Float. Length of square size.
color: List (3) indicating RGB colors.

Returns

Array (H, W, 3) with square.

[source]

draw_triangle

paz.backend.image.draw.draw_triangle(image, center, color, size)

Draw a triangle in an image

Arguments

image: Array (H, W, 3)
center: List (2) containing (x_center, y_center).
size: Float. Length of square size.
color: Tuple (3) indicating the RGB colors.

Returns

Array (H, W, 3) with triangle.

[source]

draw_keypoint

paz.backend.image.draw.draw_keypoint(image, point, color=(0, 255, 0), radius=5)

Draws a circle in image.

Arguments

image: Numpy array of shape [H, W, 3].
point: List of length two indicating (y, x) openCV coordinates.
color: List of length three indicating RGB color of point.
radius: Integer indicating the radius of the point to be drawn.

Returns

Numpy array with shape [H, W, 3]. Image with circle.

[source]

draw_cube

paz.backend.image.draw.draw_cube(image, points, color=(0, 255, 0), thickness=2, radius=5)

Draws a cube in image.

Arguments

image: Numpy array of shape (H, W, 3).
points: List of length 8 having each element a list of length two indicating (U, V) openCV coordinates.
color: List of length three indicating RGB color of point.
thickness: Integer indicating the thickness of the line to be drawn.
radius: Integer indicating the radius of corner points to be drawn.

Returns

Numpy array with shape (H, W, 3). Image with cube.

[source]

draw_dot

paz.backend.image.draw.draw_dot(image, point, color=(0, 255, 0), radius=5, filled=-1)

Draws a dot (small rectangle) in image.

Arguments

image: Numpy array of shape [H, W, 3].
point: List of length two indicating (y, x) openCV coordinates.
color: List of length three indicating RGB color of point.
radius: Integer indicating the radius of the point to be drawn.
filled: Boolean. If True rectangle is filled with color.

Returns

Numpy array with shape [H, W, 3]. Image with dot.

[source]

draw_filled_polygon

paz.backend.image.draw.draw_filled_polygon(image, vertices, color)

Draws filled polygon

Arguments

image: Numpy array.
vertices: List of elements each having a list of length two indicating (y, x) openCV coordinates.
color: Numpy array specifying RGB color of the polygon.

Returns

Numpy array with shape [H, W, 3]. Image with polygon.

[source]

draw_line

paz.backend.image.draw.draw_line(image, point_A, point_B, color=(0, 255, 0), thickness=5)

Draws a line in image from point_A to point_B.

Arguments

image: Numpy array of shape [H, W, 3].
point_A: List of length two indicating (y, x) openCV coordinates.
point_B: List of length two indicating (y, x) openCV coordinates.
color: List of length three indicating RGB color of point.
thickness: Integer indicating the thickness of the line to be drawn.

Returns

Numpy array with shape [H, W, 3]. Image with line.

[source]

draw_random_polygon

paz.backend.image.draw.draw_random_polygon(image, max_radius_scale=0.5)

Draw random polygon image.

Arguments

image: Numpy array with shape [H, W, 3].
max_radius_scale: Float between [0, 1].

Returns

Numpy array with shape [H, W, 3]. Image with polygon.

[source]

draw_rectangle

paz.backend.image.draw.draw_rectangle(image, corner_A, corner_B, color, thickness)

Draws a filled rectangle from corner_A to corner_B.

Arguments

image: Numpy array of shape [H, W, 3].
corner_A: List of length two indicating (y, x) openCV coordinates.
corner_B: List of length two indicating (y, x) openCV coordinates.
color: List of length three indicating RGB color of point.
thickness: Integer/openCV Flag. Thickness of rectangle line. or for filled use cv2.FILLED flag.

Returns

Numpy array with shape [H, W, 3]. Image with rectangle.

[source]

lincolor

paz.backend.image.draw.lincolor(num_colors, saturation=1, value=1, normalized=False)

Creates a list of RGB colors linearly sampled from HSV space with randomised Saturation and Value.

Arguments

num_colors: Int.
saturation: Float or None. If float indicates saturation. If None it samples a random value.
value: Float or None. If float indicates value. If None it samples a random value.
normalized: Bool. If True, RGB colors are returned between [0, 1] if False, RGB colors are between [0, 255].

Returns

List, for which each element contains a list with RGB color

[source]

put_text

paz.backend.image.draw.put_text(image, text, point, scale, color, thickness)

Draws text in image.

Arguments

image: Numpy array.
text: String. Text to be drawn.
point: Tuple of coordinates indicating the top corner of the text.
scale: Float. Scale of text.
color: Tuple of integers. RGB color coordinates.
thickness: Integer. Thickness of the lines used for drawing text.

Returns

Numpy array with shape [H, W, 3]. Image with text.

[source]

make_mosaic

paz.backend.image.draw.make_mosaic(images, shape, border=0)

Creates an image mosaic.

Arguments

images: Numpy array of shape (num_images, height, width, num_channels)
shape: List of two integers indicating the mosaic shape.
border: Integer indicating the border per image.

Returns

A numpy array containing all images.

Exceptions

Shape must satisfy len(images) > shape[0] * shape[1]

[source]

draw_points2D

paz.backend.image.draw.draw_points2D(image, points2D, colors)

Draws a pixel for all points2D in UV space using only numpy.

Arguments

image: Array (H, W).
keypoints: Array (num_points, U, V). Keypoints in image space
colors: Array (num_points, 3). Colors in RGB space.

Returns

Array with drawn points.

[source]

draw_keypoints_link

paz.backend.image.draw.draw_keypoints_link(image, keypoints, link_args, link_orders, link_colors, check_scores=False, link_width=2)

Draw link between the keypoints.

Arguments

images: Numpy array.
keypoints: Keypoint(k0, k1, ...) locations in the image. Numpy array.
link_args: Keypoint labels. Dictionary. {'k0':0, 'k1':1, ...}
link_orders: List of tuple. [('k0', 'k1'),('kl', 'k2'), ...]
link_colors: Color of each link. List of list
check_scores: Condition to draw links. Boolean.

Returns

A numpy array containing drawn link between the keypoints.

[source]

draw_keypoints

paz.backend.image.draw.draw_keypoints(image, keypoints, keypoint_colors, check_scores=False, keypoint_radius=6)

Draw a circle at keypoints.

Arguments

images: Numpy array.
keypoints: Keypoint locations in the image. Numpy array.
keypoint_colors: Color of each keypoint. List of list
check_scores: Condition to draw keypoint. Boolean.

Returns

A numpy array containing circle at each keypoints.

[source]

points3D_to_RGB

paz.backend.image.draw.points3D_to_RGB(points3D, object_sizes)

Transforms points3D in object frame to RGB color space. Arguments

points3D: Array (num_points, 3). Points3D a
object_sizes: Array (3) indicating the (width, height, depth) of object.

Returns

Array of ints (num_points, 3) in RGB space.

[source]

draw_RGB_mask

paz.backend.image.draw.draw_RGB_mask(image, points2D, points3D, object_sizes)

Draws RGB mask by transforming points3D to RGB space and putting in them in their 2D coordinates (points2D)

Arguments

image: Array (H, W, 3).
points2D: Array (num_points, 2)
points3D: Array (num_points, 3)
object_sizes: Array (x_size, y_size, z_size)

Returns

Image array with drawn masks

[source]

draw_RGB_masks

paz.backend.image.draw.draw_RGB_masks(image, points2D, points3D, object_sizes)

Draws RGB masks by transforming points3D to RGB space and putting in them in their 2D coordinates (points2D)

Arguments

image: Array (H, W, 3).
points2D: Array (num_samples, num_points, 2)
points3D: Array (num_samples, num_points, 3)
object_sizes: Array (x_size, y_size, z_size)

Returns

Image array with drawn masks

[source]

draw_human_pose6D

paz.backend.image.draw.draw_human_pose6D(image, rotation, translation, camaera_intrinsics)

Draw basis vectors for human pose 6D

Arguments

image: numpy array
rotation: numpy array of size (3 x 3)
translations: list of length 3
camera_matrix: numpy array

Returns

image: numpy array image with basis vectors of rotaion and translation.