niryo_libraries.cv_bridge.core.CvBridge

class documentation

class CvBridge(object):

The CvBridge is an object that converts between OpenCV Images and ROS Image messages.

Method	`__init__`	Undocumented
Method	`compressed_imgmsg_to_cv2`	Convert a sensor_msgs::CompressedImage message to an OpenCV :cpp:type:`cv::Mat`.
Method	`cv2_to_compressed_imgmsg`	Convert an OpenCV :cpp:type:`cv::Mat` type to a ROS sensor_msgs::CompressedImage message.
Method	`cv2_to_imgmsg`	Convert an OpenCV :cpp:type:`cv::Mat` type to a ROS sensor_msgs::Image message.
Method	`cvtype2_to_dtype_with_channels`	Undocumented
Method	`dtype_with_channels_to_cvtype2`	Undocumented
Method	`encoding_to_cvtype2`	Undocumented
Method	`encoding_to_dtype_with_channels`	Undocumented
Method	`imgmsg_to_cv2`	Convert a sensor_msgs::Image message to an OpenCV :cpp:type:`cv::Mat`.
Instance Variable	`cvdepth_to_numpy_depth`	Undocumented
Instance Variable	`cvtype_to_name`	Undocumented
Instance Variable	`numpy_type_to_cvtype`	Undocumented

def __init__(self): ¶

Undocumented

def compressed_imgmsg_to_cv2(self, cmprs_img_msg, desired_encoding='passthrough'): ¶

Convert a sensor_msgs::CompressedImage message to an OpenCV :cpp:type:`cv::Mat`.

If desired_encoding is "passthrough", then the returned image has the same format as img_msg. Otherwise desired_encoding must be one of the standard image encodings

This function returns an OpenCV :cpp:type:`cv::Mat` message on success, or raises cv_bridge.CvBridgeError on failure.

If the image only has one channel, the shape has size 2 (width and height)

Parameters
cmprs_img_msg	A :cpp:type:`sensor_msgs::CompressedImage` message
desired_encoding	The encoding of the image data, one of the following strings: `"passthrough"` one of the standard strings in sensor_msgs/image_encodings.h
Returns
:cpp:type:`cv::Mat`	Undocumented
Raises
`CvBridgeError`	when conversion is not possible.

def cv2_to_compressed_imgmsg(self, cvim, dst_format='jpg'): ¶

Convert an OpenCV :cpp:type:`cv::Mat` type to a ROS sensor_msgs::CompressedImage message.

This function returns a sensor_msgs::Image message on success, or raises cv_bridge.CvBridgeError on failure.

Parameters
cvim	An OpenCV :cpp:type:`cv::Mat`
dst_format	The format of the image data, one of the following strings: from http://docs.opencv.org/2.4/modules/highgui/doc/reading_and_writing_images_and_video.html from http://docs.opencv.org/2.4/modules/highgui/doc/reading_and_writing_images_and_video.html#Mat imread(const string& filename, int flags) bmp, dib jpeg, jpg, jpe jp2 png pbm, pgm, ppm sr, ras tiff, tif
Returns
A sensor_msgs.msg.CompressedImage message	Undocumented
Raises
`CvBridgeError`	when the `cvim` has a type that is incompatible with `format`

def cv2_to_imgmsg(self, cvim, encoding='passthrough', header=None): ¶

Convert an OpenCV :cpp:type:`cv::Mat` type to a ROS sensor_msgs::Image message.

If encoding is "passthrough", then the message has the same encoding as the image's OpenCV type. Otherwise desired_encoding must be one of the standard image encodings

This function returns a sensor_msgs::Image message on success, or raises cv_bridge.CvBridgeError on failure.

Parameters
cvim	An OpenCV :cpp:type:`cv::Mat`
encoding	The encoding of the image data, one of the following strings: `"passthrough"` one of the standard strings in sensor_msgs/image_encodings.h
header	A std_msgs.msg.Header message
Returns
A sensor_msgs.msg.Image message	Undocumented
Raises
`CvBridgeError`	when the `cvim` has a type that is incompatible with `encoding`

def cvtype2_to_dtype_with_channels(self, cvtype): ¶

Undocumented

def dtype_with_channels_to_cvtype2(self, dtype, n_channels): ¶

Undocumented

def encoding_to_cvtype2(self, encoding): ¶

Undocumented

def encoding_to_dtype_with_channels(self, encoding): ¶

Undocumented

def imgmsg_to_cv2(self, img_msg, desired_encoding='passthrough'): ¶

Convert a sensor_msgs::Image message to an OpenCV :cpp:type:`cv::Mat`.

If desired_encoding is "passthrough", then the returned image has the same format as img_msg. Otherwise desired_encoding must be one of the standard image encodings

This function returns an OpenCV :cpp:type:`cv::Mat` message on success, or raises cv_bridge.CvBridgeError on failure.

If the image only has one channel, the shape has size 2 (width and height)

Parameters
img_msg	A :cpp:type:`sensor_msgs::Image` message
desired_encoding	The encoding of the image data, one of the following strings: `"passthrough"` one of the standard strings in sensor_msgs/image_encodings.h
Returns
:cpp:type:`cv::Mat`	Undocumented
Raises
`CvBridgeError`	when conversion is not possible.

cvdepth_to_numpy_depth = ¶

Undocumented

cvtype_to_name: dict = ¶

Undocumented

numpy_type_to_cvtype: dict[str, str] = ¶

Undocumented