Method FloodFill

Namespace

OpenCvSharp

Assembly

OpenCvSharp.dll

FloodFill(InputOutputArray, Point, Scalar)

Fills a connected component with the given color.

public static int FloodFill(InputOutputArray image, Point seedPoint, Scalar newVal)

Parameters

image InputOutputArray

Input/output 1- or 3-channel, 8-bit, or floating-point image. It is modified by the function unless the FLOODFILL_MASK_ONLY flag is set in the second variant of the function. See the details below.

seedPoint Point

Starting point.

newVal Scalar

New value of the repainted domain pixels.

Returns

int

FloodFill(InputOutputArray, Point, Scalar, out Rect, Scalar?, Scalar?, FloodFillFlags)

Fills a connected component with the given color.

public static int FloodFill(InputOutputArray image, Point seedPoint, Scalar newVal, out Rect rect, Scalar? loDiff = null, Scalar? upDiff = null, FloodFillFlags flags = FloodFillFlags.Link4)

Parameters

image InputOutputArray

Input/output 1- or 3-channel, 8-bit, or floating-point image. It is modified by the function unless the FLOODFILL_MASK_ONLY flag is set in the second variant of the function. See the details below.

seedPoint Point

Starting point.

newVal Scalar

New value of the repainted domain pixels.

rect Rect

Optional output parameter set by the function to the minimum bounding rectangle of the repainted domain.

loDiff Scalar?

Maximal lower brightness/color difference between the currently observed pixel and one of its neighbors belonging to the component, or a seed pixel being added to the component.

upDiff Scalar?

Maximal upper brightness/color difference between the currently observed pixel and one of its neighbors belonging to the component, or a seed pixel being added to the component.

flags FloodFillFlags

Operation flags. Lower bits contain a connectivity value, 4 (default) or 8, used within the function. Connectivity determines which neighbors of a pixel are considered. Using FloodFillFlags.MaskOnly will fill in the mask using the grey value 255 (white).

Returns

int

FloodFill(InputOutputArray, InputOutputArray, Point, Scalar)

Fills a connected component with the given color.

public static int FloodFill(InputOutputArray image, InputOutputArray mask, Point seedPoint, Scalar newVal)

Parameters

image InputOutputArray

Input/output 1- or 3-channel, 8-bit, or floating-point image. It is modified by the function unless the FLOODFILL_MASK_ONLY flag is set in the second variant of the function. See the details below.

mask InputOutputArray

(For the second function only) Operation mask that should be a single-channel 8-bit image, 2 pixels wider and 2 pixels taller. The function uses and updates the mask, so you take responsibility of initializing the mask content. Flood-filling cannot go across non-zero pixels in the mask. For example, an edge detector output can be used as a mask to stop filling at edges. It is possible to use the same mask in multiple calls to the function to make sure the filled area does not overlap.

seedPoint Point

Starting point.

newVal Scalar

New value of the repainted domain pixels.

Returns

int

FloodFill(InputOutputArray, InputOutputArray, Point, Scalar, out Rect, Scalar?, Scalar?, FloodFillFlags)

Fills a connected component with the given color.

public static int FloodFill(InputOutputArray image, InputOutputArray mask, Point seedPoint, Scalar newVal, out Rect rect, Scalar? loDiff = null, Scalar? upDiff = null, FloodFillFlags flags = FloodFillFlags.Link4)

Parameters

image InputOutputArray

Input/output 1- or 3-channel, 8-bit, or floating-point image. It is modified by the function unless the FLOODFILL_MASK_ONLY flag is set in the second variant of the function. See the details below.

mask InputOutputArray

(For the second function only) Operation mask that should be a single-channel 8-bit image, 2 pixels wider and 2 pixels taller. The function uses and updates the mask, so you take responsibility of initializing the mask content. Flood-filling cannot go across non-zero pixels in the mask. For example, an edge detector output can be used as a mask to stop filling at edges. It is possible to use the same mask in multiple calls to the function to make sure the filled area does not overlap.

seedPoint Point

Starting point.

newVal Scalar

New value of the repainted domain pixels.

rect Rect

Optional output parameter set by the function to the minimum bounding rectangle of the repainted domain.

loDiff Scalar?

Maximal lower brightness/color difference between the currently observed pixel and one of its neighbors belonging to the component, or a seed pixel being added to the component.

upDiff Scalar?

Maximal upper brightness/color difference between the currently observed pixel and one of its neighbors belonging to the component, or a seed pixel being added to the component.

flags FloodFillFlags

Operation flags. Lower bits contain a connectivity value, 4 (default) or 8, used within the function. Connectivity determines which neighbors of a pixel are considered. Using FloodFillFlags.MaskOnly will fill in the mask using the grey value 255 (white).

Returns

int