bboxresize
Resize bounding boxes
Description
Examples
Read an image.
I = imread('peppers.png');
Define bounding boxes and labels.
bboxA = [ 410 230 100 90 186 78 80 60 ]
bboxA = 2×4
410 230 100 90
186 78 80 60
labelsA = [ "garlic" "onion" ];
Resize the image and the bounding boxes.
scale = 1.5; J = imresize(I,scale); bboxB = bboxresize(bboxA,scale);
Display the results.
figure I = insertObjectAnnotation(I,'Rectangle',bboxA,labelsA); J = insertObjectAnnotation(J,'Rectangle',bboxB,labelsA); imshowpair(I,J,'montage')
Input Arguments
Bounding boxes, specified as an M-by-4, M-by-5, or M-by-9 nonsparse numeric matrix of M bounding boxes. Each row, M, of the matrix defines a bounding box as either an axis-aligned rectangle, a rotate rectangle, or a cuboid. The table below describes the format of the bounding boxes.
Bounding Box | Description |
---|---|
Axis-aligned rectangle |
Defined in spatial coordinates as an M-by-4 numeric matrix with rows of the form [x y w h], where:
|
Rotated rectangle |
Defined in spatial coordinates as an M-by-5 numeric matrix with rows of the form [xctr yctr xlen ylen yaw], where:
|
Cuboid |
Defined in spatial coordinates as an M-by-9 numeric matrix with rows of the form [xctr yctr zctr xlen ylen zlen xrot yrot zrot], where:
The figure shows how these values determine the position of a cuboid. |
Scale, specified as a scalar or a row vector. When you specify a scalar, the
function applies the same scale factor to the height and width of the bounding boxes in
bboxA
. When you specify a row vector, the function applies the
factor in the first element of the vector to resize the height and the second element to
resize the width of the bounding boxes.
Output Arguments
Warped bounding boxes, returned as an M2-by-N
matrix of M2 bounding boxes. The number of bounding boxes returned is
less than the number of bounding boxes in the input. Each row, M2, of
the matrix defines one bounding box of the same type as the input
bboxA
. When bboxB
contains floating point
data, the function returns it with the same type as bboxA
.
Otherwise, the function returns bboxB
as type
single
.
Version History
Introduced in R2019bThe bboxresize
,
bboxcrop
,
bboxwarp
, and
showShape
functions assume the input bounding box coordinates for axis-aligned rectangles are
specified in spatial coordinates and return the transformed bounding boxes in spatial
coordinates.
MATLAB Command
You clicked a link that corresponds to this MATLAB command:
Run the command by entering it in the MATLAB Command Window. Web browsers do not support MATLAB commands.
웹사이트 선택
번역된 콘텐츠를 보고 지역별 이벤트와 혜택을 살펴보려면 웹사이트를 선택하십시오. 현재 계신 지역에 따라 다음 웹사이트를 권장합니다:
또한 다음 목록에서 웹사이트를 선택하실 수도 있습니다.
사이트 성능 최적화 방법
최고의 사이트 성능을 위해 중국 사이트(중국어 또는 영어)를 선택하십시오. 현재 계신 지역에서는 다른 국가의 MathWorks 사이트 방문이 최적화되지 않았습니다.
미주
- América Latina (Español)
- Canada (English)
- United States (English)
유럽
- Belgium (English)
- Denmark (English)
- Deutschland (Deutsch)
- España (Español)
- Finland (English)
- France (Français)
- Ireland (English)
- Italia (Italiano)
- Luxembourg (English)
- Netherlands (English)
- Norway (English)
- Österreich (Deutsch)
- Portugal (English)
- Sweden (English)
- Switzerland
- United Kingdom (English)