Video

class ocvproto.sources.video.Property(cv_prop: int, *, max: int = None)

Bases: object

Represents a capture video property with restrictions.

class ocvproto.sources.video.Video(src: Union[str, <sphinx.ext.autodoc.importer._MockObject object at 0x7f886e166da0>])

Bases: ocvproto.sources.base.Source

Represents a video.

absdiff(frame: Union[<sphinx.ext.autodoc.importer._MockObject object at 0x7f886e166da0>, Frame]) → ocvproto.frame.Frame

Returns absolute difference between the current and a given frame as a new Source.

Parameters:frame –

blur(ksize: Tuple[int, int]) → ocvproto.frame.Frame

Blures the current frame inplace.

Parameters:ksize – Kernel size tuple (width, height)

canny(thr_1: int, thr_2: int) → ocvproto.frame.Frame

Applies Canny Edge Detection algorithm to the current frame inplace.

Parameters:

• thr_1 –
• thr_2 –

codec

FOURCC codec alias.

describe_properties() → Dict[str, Any]

Returns descriptions for CV properties found in the class of this object and its bases.

One can initialize trackbars with these descriptions: see Window.add_trackbar_group()

dilate(element: Union[<sphinx.ext.autodoc.importer._MockObject object at 0x7f886e166da0>, Frame], iterations: int = None) → ocvproto.frame.Frame

Dilates the current frame inplace.

Parameters:

• element –
• iterations –

draw_rectangle(*, pos: Tuple[int, int], width: int, height: int, color: Union[int, str, Tuple[int, int, int]] = None)

Draws a rectangle.

Parameters:

• pos – Top left corner (x, y).
• width –
• height –
• color –

dump(frame: Union[<sphinx.ext.autodoc.importer._MockObject object at 0x7f886e166da0>, Frame] = None)

Writes the current or the given frame. Automatically configures writer object is needed.

dump_image(fpath: Union[str, pathlib.Path] = None)

Dumps the image into a file.

Parameters:fpath – Filepath to store image into. If not set, name is generated automatically.

dump_setup(fpath: Union[str, pathlib.Path] = 'ocvproto.avi', *, width: int = None, height: int = None, fps: Union[int, float] = None, codec: str = 'XVID') → <sphinx.ext.autodoc.importer._MockObject object at 0x7f886dff45c0>

Configures write parameters. Returns opencv writer object.

Parameters:

• fpath – Filepath.
• width –
• height –
• fps – Frames per second.
• codec – FOURCC codec alias.

fill(color: Union[int, str, Tuple[int, int, int]])

Fills the canvas with the given color.

Parameters:color –

focus

Focus

fps

FPS

frame

Current frame.

gamma

Gamma

get_image() → ocvproto.sources.image.Image

Returns image object from the current frame.

height

Height

make_gray() → ocvproto.frame.Frame

Makes the current frame grayscale inplace.

make_rgb() → ocvproto.frame.Frame

Makes the current frame RGB inplace.

read() → ocvproto.sources.video.Video

Read and return current frame.

resize(width: int, height: int) → ocvproto.frame.Frame

Resizes the current frame inplace.

Parameters:

• width –
• height –

set_property(name: str, value: int)

Helper method to set property value.

Parameters:

• name – Property name.
• value –

sharpness

Sharpness

width

Width

zoom

Zoom