I need to generate such a field:
Photo
But I don't know how to do it. What happened to me:
My result
My code:
[ContextMenu("Generate grid")]
public void GenerateGrid()
{
for(int x = 0; x < _gridSize.x; x++)
{
for (int z = 0; z < _gridSize.z; z++)
{
var meshSize = _cell.GetComponent<MeshRenderer>().bounds.size;
var position = new Vector3(x * (meshSize.x + _offset), 0, z * (meshSize.z + _offset));
var cell = Instantiate(_cell, position, Quaternion.Euler(_rotationOffset), _parent.transform);
cell.GridActions = GridActions;
cell.Position = new Vector2(x, z);
cell.name = $"Cell: x:{x}, z:{z}";
GridActions.AllCell.Add(cell);
}
}
}
Simply for every odd z value, move the cell up/down by half a cell size, and move them inward toward the previous cell half a cell size. I didnt test it, but here is the code that might do that, not sure tho, again I didnt test this.
[ContextMenu("Generate grid")]
public void GenerateGrid()
{
for(int x = 0; x < _gridSize.x; x++)
{
for (int z = 0; z < _gridSize.z; z++)
{
int xResize = 0;
int zResize = 0;
if (z % 2 == 1) {
xResize = meshSize.x / 2;
zResize = meshSize.z / 2;
}
var meshSize = _cell.GetComponent<MeshRenderer>().bounds.size;
var position = new Vector3(x * (meshSize.x + _offset - xResize), 0, z * (meshSize.z + _offset - zResize));
var cell = Instantiate(_cell, position, Quaternion.Euler(_rotationOffset), _parent.transform);
cell.GridActions = GridActions;
cell.Position = new Vector2(x, z);
cell.name = $"Cell: x:{x}, z:{z}";
GridActions.AllCell.Add(cell);
}
}
}
When some values are small in QML pie chart, slice labels are messed up:
How can I arrange slice labels like this?
Note that this is available in telerik and /or dev components for c#.
I used of #luffy 's comment and with some modification, I reached to following code and result:
import QtQuick 2.4
Rectangle {
id: root
// public
property string fontFamily: "sans-serif"
property int fontPointSize: 9
property double donutHoleSize: 0.4 //0~1
property string title: 'title'
property variant points: []//[['Zero', 60, 'red'], ['One', 40, 'blue']] // y values don't need to add to 100
width: 500
height: 700
// private
onPointsChanged: myCanvas.requestPaint()
Canvas {
id: myCanvas
anchors.fill: parent
property double factor: Math.min(width, height)
Text { // title
text: title
anchors.horizontalCenter: parent.horizontalCenter
font.pixelSize: 0.03 * myCanvas.factor
}
onPaint: {
var context = getContext("2d")
var total = 0 // automatically calculated from points.y
var start = -Math.PI / 2 // Start from vertical. 0 is 3 o'clock and positive is clockwise
var radius = 0.25 * myCanvas.factor
var pixelSize = 0.03 * myCanvas.factor // text
context.font = root.fontPointSize + 'pt ' + root.fontFamily
var i = 0;
for(i = 0; i < points.length; i++) total += points[i][1] // total
context.clearRect(0, 0, width, height) // new points data
//--------------------------------------------------------
var end = 0;
var center = 0;
var angle = 0;
var midSlice = 0;
var point = 0;
var topRightCnt = 0
var bottomRightCnt = 0
var topLeftCnt = 0
var bottomLeftCnt = 0
var itemsPos = []
center = Qt.vector2d(width / 2, height / 2) // center
for(i = 0; i < points.length; i++) {
end = start + 2 * Math.PI * points[i][1] / total // radians
angle = (start + end) / 2 // of line
midSlice = Qt.vector2d(Math.cos((end + start) / 2), Math.sin((end + start) / 2)).times(radius) // point on edge/middle of slice
point = midSlice.times(1 + 1.4 * (1 - Math.abs(Math.cos(angle)))).plus(center) // elbow of line
if(point.x<center.x && point.y<=center.y) {
topLeftCnt++;
itemsPos[i] = "tl"
}
else if(point.x<center.x && point.y>center.y) {
bottomLeftCnt++;
itemsPos[i] = "bl"
}
else if(point.x>=center.x && point.y<=center.y) {
topRightCnt++;
itemsPos[i] = "tr"
}
else {
bottomRightCnt++;
itemsPos[i] = "br"
}
start = end // radians
}
//--------------------------------------------------------
end = 0;
angle = 0;
midSlice = 0;
point = 0;
var itemPosCounterTR = 0;
var itemPosCounterTL = 0;
var itemPosCounterBR = 0;
var itemPosCounterBL = 0;
for(i = 0; i < points.length; i++) {
end = start + 2 * Math.PI * points[i][1] / total // radians
// pie
context.fillStyle = points[i][2]
context.beginPath()
midSlice = Qt.vector2d(Math.cos((end + start) / 2), Math.sin((end + start) / 2)).times(radius) // point on edge/middle of slice
context.arc(center.x, center.y, radius, start, end) // x, y, radius, startingAngle (radians), endingAngle (radians)
context.lineTo(center.x, center.y) // center
context.fill()
// text
context.fillStyle = points[i][2]
angle = (start + end) / 2 // of line
point = midSlice.times(1 + 1.4 * (1 - Math.abs(Math.cos(angle)))).plus(center) // elbow of line
//---------------------------------------------
var textX = 0;
var textY = 0;
var dis = 0;
var percent = points[i][1] / total * 100
var text = points[i][0] + ': ' + (percent < 1? '< 1': Math.round(percent)) + '%' // display '< 1%' if < 1
var textWidth = context.measureText(text).width
var textHeight = 15
var diameter = radius * 2
var topCircle = center.y - radius
var leftCircle = center.x - radius
if(itemsPos[i] === "tr") {
textX = leftCircle + 1.15 * diameter
dis = Math.floor((1.15*radius) / topRightCnt) //Math.floor((height/2) / topRightCnt)
dis = (dis < 20 ? 20 : dis)
textY = topCircle -(0.15*diameter) + (itemPosCounterTR*dis) + (textHeight/2)
itemPosCounterTR++
}
else if(itemsPos[i] === "br") {
textX = leftCircle + 1.15 * diameter
dis = Math.floor((1.15*radius) / bottomRightCnt)
dis = (dis < 20 ? 20 : dis)
textY = topCircle+(1.15*diameter) - ((bottomRightCnt-itemPosCounterBR-1)*dis) - (textHeight/2)
itemPosCounterBR++
}
else if(itemsPos[i] === "tl") {
textX = leftCircle - (0.15 * diameter) - textWidth
dis = Math.floor((1.15*radius) / topLeftCnt)
dis = (dis < 20 ? 20 : dis)
textY = topCircle-(0.15*diameter) + ((topLeftCnt-itemPosCounterTL-1)*dis) + (textHeight/2)
itemPosCounterTL++;
}
else {
textX = leftCircle - (0.15 * diameter) - textWidth //-0.2 * width - textWidth
dis = Math.floor((1.15*radius) / bottomLeftCnt)
dis = (dis < 20 ? 20 : dis)
textY = topCircle+(1.15*diameter) - (itemPosCounterBL*dis) - (textHeight/2)
itemPosCounterBL++
}
//---------------------------------------------
context.fillText(text, textX, textY)
// line
context.lineWidth = 1
context.strokeStyle = points[i][2]
context.beginPath()
context.moveTo(center.x + midSlice.x, center.y + midSlice.y) // center
var endLineX = (point.x < center.x ? (textWidth + 0.5 * pixelSize) : (-0.5 * pixelSize)) + textX;
context.lineTo(endLineX, textY+3)
context.lineTo(endLineX + (point.x < center.x? -1: 1) * ((0.5 * pixelSize)+textWidth), textY+3) // horizontal
context.stroke()
start = end // radians
}
if(root.donutHoleSize > 0) {
root.donutHoleSize = Math.min(0.99, root.donutHoleSize);
var holeRadius = root.donutHoleSize * radius;
context.fillStyle = root.color
context.beginPath()
context.arc(center.x, center.y, holeRadius, 0, 2*Math.PI) // x, y, radius, startingAngle (radians), endingAngle (radians)
//context.lineTo(center.x, center.y) // center
context.fill()
}
}
}
}
And it's result:
Thanks #luffy.
There is a code for a drawing circle with LineRenderer.
but I want to draw multiple circles with different radius, I used "for loop" but there is one circle instead of multiple
public float ThetaScale = 0.01f;
public float radius = 3f;
private int Size;
private LineRenderer LineDrawer;
private float Theta = 0f;
void Start ()
{
LineDrawer = GetComponent<LineRenderer>();
}
void Update ()
{
Theta = 0f;
Size = (int)((1f / ThetaScale) + 1f);
LineDrawer.SetVertexCount(Size);
for (int l = 0; l < 5; l++)
{
for(int i = 0; i < Size; i++)
{
Theta += (2.0f * Mathf.PI * ThetaScale);
float x = l * radius * Mathf.Cos(Theta);
float y = l * radius * Mathf.Sin(Theta);
LineDrawer.SetPosition(i, new Vector3(x, 0, y));
}
}
}
In every loop you always overwrite the same positions indices in the same line renderer. So you will always only have the last circle.
Note that it is also quite expensive to use SetPoisition repeatedly. As it says in the API you should rather work on an array and then use SetPoisitions to assign all positions at once.
One thing is a bit unclear though: If you use one single LineRenderer you won't get independent circles but they will always be connected at some point. Otherwise you would need 5 separated LineRenderer instances.
Option A: 5 circles but connected to each other since part of a single LineRenderer
void Start ()
{
LineDrawer = GetComponent<LineRenderer>();
LineDrawer.loop = false;
Theta = 0f;
// Use one position more to close the circle
Size = (int)((1f / ThetaScale) + 1f) + 1;
LineDrawer.positionCount = 5 * Size;
var positions = new Vector3[5 * Size];
for (int l = 0; l < 5; l++)
{
for(int i = 0; i < Size; i++)
{
Theta += (2.0f * Mathf.PI * ThetaScale);
float x = l * radius * Mathf.Cos(Theta);
float y = l * radius * Mathf.Sin(Theta);
positions[5 * l + i] = new Vector3(x, 0, y);
}
}
LineDrawer.SetPositions(positions);
}
Option B: 5 separated circles in 5 separated LineRenderers
// Drag 5 individual LineRenderer here via the Inspector
public LineRenderer[] lines = new LineRenderer[5];
void Start ()
{
foreach(var line in lines)
{
line.loop = true;
Theta = 0f;
Size = (int)((1f / ThetaScale) + 1f);
line.positionCount = Size;
var positions = new Vector3[Size];
for(int i = 0; i < Size; i++)
{
Theta += (2.0f * Mathf.PI * ThetaScale);
float x = l * radius * Mathf.Cos(Theta);
float y = l * radius * Mathf.Sin(Theta);
positions[5 * l + i] = new Vector3(x, 0, y);
}
line.SetPositions(positions);
}
}
You missed few details here and there. Here, this will work:
using UnityEngine;
[ExecuteAlways]
[RequireComponent( typeof(LineRenderer) )]
public class CircularBehaviour : MonoBehaviour
{
[SerializeField][Min(3)] int _numSegments = 16;
[SerializeField][Min(1)] int _numCircles = 5;
[SerializeField] float _radius = 3f;
LineRenderer _lineRenderer;
void Awake ()
{
_lineRenderer = GetComponent<LineRenderer>();
_lineRenderer.loop = false;
_lineRenderer.useWorldSpace = false;
}
void Update ()
{
const float TAU = 2f * Mathf.PI;
float theta = TAU / (float)_numSegments;
int numVertices = _numSegments + 1;
_lineRenderer.positionCount = numVertices * _numCircles;
int vert = 0;
for( int l=1 ; l<=_numCircles ; l++ )
{
float r = _radius * (float)l;
for( int i=0 ; i<numVertices ; i++ )
{
float f = theta * (float)i;
Vector3 v = new Vector3{ x=Mathf.Cos(f) , y=Mathf.Sin(f) } * r;
_lineRenderer.SetPosition( vert++ , v );
}
}
}
}
But
as #derHugo explained, this is not what you're looking for exactly as all circles will be drawn connected.
I want to convert camera image from function startImageStream of camera plugin in Flutter to Image to crop that image but I only find the way to convert to FirebaseVisionImage.
Edit For Color Image
if I understand you clear. You are trying to covnert YUV420 format. The following is code snippet from: https://github.com/flutter/flutter/issues/26348
const shift = (0xFF << 24);
Future<Image> convertYUV420toImageColor(CameraImage image) async {
try {
final int width = image.width;
final int height = image.height;
final int uvRowStride = image.planes[1].bytesPerRow;
final int uvPixelStride = image.planes[1].bytesPerPixel;
print("uvRowStride: " + uvRowStride.toString());
print("uvPixelStride: " + uvPixelStride.toString());
// imgLib -> Image package from https://pub.dartlang.org/packages/image
var img = imglib.Image(width, height); // Create Image buffer
// Fill image buffer with plane[0] from YUV420_888
for (int x = 0; x < width; x++) {
for (int y = 0; y < height; y++) {
final int uvIndex = uvPixelStride * (x / 2).floor() + uvRowStride * (y / 2).floor();
final int index = y * width + x;
final yp = image.planes[0].bytes[index];
final up = image.planes[1].bytes[uvIndex];
final vp = image.planes[2].bytes[uvIndex];
// Calculate pixel color
int r = (yp + vp * 1436 / 1024 - 179).round().clamp(0, 255);
int g = (yp - up * 46549 / 131072 + 44 - vp * 93604 / 131072 + 91).round().clamp(0, 255);
int b = (yp + up * 1814 / 1024 - 227).round().clamp(0, 255);
// color: 0x FF FF FF FF
// A B G R
img.data[index] = shift | (b << 16) | (g << 8) | r;
}
}
imglib.PngEncoder pngEncoder = new imglib.PngEncoder(level: 0, filter: 0);
List<int> png = pngEncoder.encodeImage(img);
muteYUVProcessing = false;
return Image.memory(png);
} catch (e) {
print(">>>>>>>>>>>> ERROR:" + e.toString());
}
return null;
}
I found, sometimes planes[0] bytes per row is not same as width. In that case, you should do something like the code below.
static image_lib.Image convertYUV420ToImage(CameraImage cameraImage) {
final width = cameraImage.width;
final height = cameraImage.height;
final yRowStride = cameraImage.planes[0].bytesPerRow;
final uvRowStride = cameraImage.planes[1].bytesPerRow;
final uvPixelStride = cameraImage.planes[1].bytesPerPixel!;
final image = image_lib.Image(width, height);
for (var w = 0; w < width; w++) {
for (var h = 0; h < height; h++) {
final uvIndex =
uvPixelStride * (w / 2).floor() + uvRowStride * (h / 2).floor();
final index = h * width + w;
final yIndex = h * yRowStride + w;
final y = cameraImage.planes[0].bytes[yIndex];
final u = cameraImage.planes[1].bytes[uvIndex];
final v = cameraImage.planes[2].bytes[uvIndex];
image.data[index] = yuv2rgb(y, u, v);
}
}
return image;
}
static int yuv2rgb(int y, int u, int v) {
// Convert yuv pixel to rgb
var r = (y + v * 1436 / 1024 - 179).round();
var g = (y - u * 46549 / 131072 + 44 - v * 93604 / 131072 + 91).round();
var b = (y + u * 1814 / 1024 - 227).round();
// Clipping RGB values to be inside boundaries [ 0 , 255 ]
r = r.clamp(0, 255);
g = g.clamp(0, 255);
b = b.clamp(0, 255);
return 0xff000000 |
((b << 16) & 0xff0000) |
((g << 8) & 0xff00) |
(r & 0xff);
}
I need to rotate an image by very small angle, like 1-5 degrees. Does OpenCV provide simple way of doing that? From reading docs i can assume that getAffineTransform() should be involved, but there is no direct example of doing something like:
IplImage *rotateImage( IplImage *source, double angle);
If you use OpenCV > 2.0 it is as easy as
using namespace cv;
Mat rotateImage(const Mat& source, double angle)
{
Point2f src_center(source.cols/2.0F, source.rows/2.0F);
Mat rot_mat = getRotationMatrix2D(src_center, angle, 1.0);
Mat dst;
warpAffine(source, dst, rot_mat, source.size());
return dst;
}
Note: angle is in degrees, not radians.
See the C++ interface documentation for more details and adapt as you need:
getRotationMatrix
warpAffine
Edit: To down voter: Please comment the reason for down voting a tried and tested code?
#include "cv.h"
#include "highgui.h"
#include "math.h"
int main( int argc, char** argv )
{
IplImage* src = cvLoadImage("lena.jpg", 1);
IplImage* dst = cvCloneImage( src );
int delta = 1;
int angle = 0;
int opt = 1; // 1： rotate & zoom
// 0: rotate only
double factor;
cvNamedWindow("src", 1);
cvShowImage("src", src);
for(;;)
{
float m[6];
CvMat M = cvMat(2, 3, CV_32F, m);
int w = src->width;
int h = src->height;
if(opt)
factor = (cos(angle*CV_PI/180.) + 1.05) * 2;
else
factor = 1;
m[0] = (float)(factor*cos(-angle*2*CV_PI/180.));
m[1] = (float)(factor*sin(-angle*2*CV_PI/180.));
m[3] = -m[1];
m[4] = m[0];
m[2] = w*0.5f;
m[5] = h*0.5f;
cvGetQuadrangleSubPix( src, dst, &M);
cvNamedWindow("dst", 1);
cvShowImage("dst", dst);
if( cvWaitKey(1) == 27 )
break;
angle =(int)(angle + delta) % 360;
}
return 0;
}
UPDATE: See the following code for rotation using warpaffine
https://code.google.com/p/opencvjp-sample/source/browse/trunk/cpp/affine2_cpp.cpp?r=48
#include <cv.h>
#include <highgui.h>
using namespace cv;
int
main(int argc, char **argv)
{
// (1)load a specified file as a 3-channel color image,
// set its ROI, and allocate a destination image
const string imagename = argc > 1 ? argv[1] : "../image/building.png";
Mat src_img = imread(imagename);
if(!src_img.data)
return -1;
Mat dst_img = src_img.clone();
// (2)set ROI
Rect roi_rect(cvRound(src_img.cols*0.25), cvRound(src_img.rows*0.25), cvRound(src_img.cols*0.5), cvRound(src_img.rows*0.5));
Mat src_roi(src_img, roi_rect);
Mat dst_roi(dst_img, roi_rect);
// (2)With specified three parameters (angle, rotation center, scale)
// calculate an affine transformation matrix by cv2DRotationMatrix
double angle = -45.0, scale = 1.0;
Point2d center(src_roi.cols*0.5, src_roi.rows*0.5);
const Mat affine_matrix = getRotationMatrix2D( center, angle, scale );
// (3)rotate the image by warpAffine taking the affine matrix
warpAffine(src_roi, dst_roi, affine_matrix, dst_roi.size(), INTER_LINEAR, BORDER_CONSTANT, Scalar::all(255));
// (4)show source and destination images with a rectangle indicating ROI
rectangle(src_img, roi_rect.tl(), roi_rect.br(), Scalar(255,0,255), 2);
namedWindow("src", CV_WINDOW_AUTOSIZE);
namedWindow("dst", CV_WINDOW_AUTOSIZE);
imshow("src", src_img);
imshow("dst", dst_img);
waitKey(0);
return 0;
}
Check my answer to a similar problem:
Rotating an image in C/C++
Essentially, use cvWarpAffine - I've described how to get the 2x3 transformation matrix from the angle in my previous answer.
Updating full answer for OpenCV 2.4 and up
// ROTATE p by R
/**
* Rotate p according to rotation matrix (from getRotationMatrix2D()) R
* #param R Rotation matrix from getRotationMatrix2D()
* #param p Point2f to rotate
* #return Returns rotated coordinates in a Point2f
*/
Point2f rotPoint(const Mat &R, const Point2f &p)
{
Point2f rp;
rp.x = (float)(R.at<double>(0,0)*p.x + R.at<double>(0,1)*p.y + R.at<double>(0,2));
rp.y = (float)(R.at<double>(1,0)*p.x + R.at<double>(1,1)*p.y + R.at<double>(1,2));
return rp;
}
//COMPUTE THE SIZE NEEDED TO LOSSLESSLY STORE A ROTATED IMAGE
/**
* Return the size needed to contain bounding box bb when rotated by R
* #param R Rotation matrix from getRotationMatrix2D()
* #param bb bounding box rectangle to be rotated by R
* #return Size of image(width,height) that will compleley contain bb when rotated by R
*/
Size rotatedImageBB(const Mat &R, const Rect &bb)
{
//Rotate the rectangle coordinates
vector<Point2f> rp;
rp.push_back(rotPoint(R,Point2f(bb.x,bb.y)));
rp.push_back(rotPoint(R,Point2f(bb.x + bb.width,bb.y)));
rp.push_back(rotPoint(R,Point2f(bb.x + bb.width,bb.y+bb.height)));
rp.push_back(rotPoint(R,Point2f(bb.x,bb.y+bb.height)));
//Find float bounding box r
float x = rp[0].x;
float y = rp[0].y;
float left = x, right = x, up = y, down = y;
for(int i = 1; i<4; ++i)
{
x = rp[i].x;
y = rp[i].y;
if(left > x) left = x;
if(right < x) right = x;
if(up > y) up = y;
if(down < y) down = y;
}
int w = (int)(right - left + 0.5);
int h = (int)(down - up + 0.5);
return Size(w,h);
}
/**
* Rotate region "fromroi" in image "fromI" a total of "angle" degrees and put it in "toI" if toI exists.
* If toI doesn't exist, create it such that it will hold the entire rotated region. Return toI, rotated imge
* This will put the rotated fromroi piece of fromI into the toI image
*
* #param fromI Input image to be rotated
* #param toI Output image if provided, (else if &toI = 0, it will create a Mat fill it with the rotated image roi, and return it).
* #param fromroi roi region in fromI to be rotated.
* #param angle Angle in degrees to rotate
* #return Rotated image (you can ignore if you passed in toI
*/
Mat rotateImage(const Mat &fromI, Mat *toI, const Rect &fromroi, double angle)
{
//CHECK STUFF
// you should protect against bad parameters here ... omitted ...
//MAKE OR GET THE "toI" MATRIX
Point2f cx((float)fromroi.x + (float)fromroi.width/2.0,fromroi.y +
(float)fromroi.height/2.0);
Mat R = getRotationMatrix2D(cx,angle,1);
Mat rotI;
if(toI)
rotI = *toI;
else
{
Size rs = rotatedImageBB(R, fromroi);
rotI.create(rs,fromI.type());
}
//ADJUST FOR SHIFTS
double wdiff = (double)((cx.x - rotI.cols/2.0));
double hdiff = (double)((cx.y - rotI.rows/2.0));
R.at<double>(0,2) -= wdiff; //Adjust the rotation point to the middle of the dst image
R.at<double>(1,2) -= hdiff;
//ROTATE
warpAffine(fromI, rotI, R, rotI.size(), INTER_CUBIC, BORDER_CONSTANT, Scalar::all(0));
//& OUT
return(rotI);
}
IplImage* rotate(double angle, float centreX, float centreY, IplImage* src, bool crop)
{
int w=src->width;
int h=src->height;
CvPoint2D32f centre;
centre.x = centreX;
centre.y = centreY;
CvMat* warp_mat = cvCreateMat(2, 3, CV_32FC1);
cv2DRotationMatrix(centre, angle, 1.0, warp_mat);
double m11= cvmGet(warp_mat,0,0);
double m12= cvmGet(warp_mat,0,1);
double m13= cvmGet(warp_mat,0,2);
double m21= cvmGet(warp_mat,1,0);
double m22= cvmGet(warp_mat,1,1);
double m23= cvmGet(warp_mat,1,2);
double m31= 0;
double m32= 0;
double m33= 1;
double x=0;
double y=0;
double u0= (m11*x + m12*y + m13)/(m31*x + m32*y + m33);
double v0= (m21*x + m22*y + m23)/(m31*x + m32*y + m33);
x=w;
y=0;
double u1= (m11*x + m12*y + m13)/(m31*x + m32*y + m33);
double v1= (m21*x + m22*y + m23)/(m31*x + m32*y + m33);
x=0;
y=h;
double u2= (m11*x + m12*y + m13)/(m31*x + m32*y + m33);
double v2= (m21*x + m22*y + m23)/(m31*x + m32*y + m33);
x=w;
y=h;
double u3= (m11*x + m12*y + m13)/(m31*x + m32*y + m33);
double v3= (m21*x + m22*y + m23)/(m31*x + m32*y + m33);
int left= MAX(MAX(u0,u2),0);
int right= MIN(MIN(u1,u3),w);
int top= MAX(MAX(v0,v1),0);
int bottom= MIN(MIN(v2,v3),h);
ASSERT(left<right&&top<bottom); // throw message?
if (left<right&&top<bottom)
{
IplImage* dst= cvCreateImage( cvGetSize(src), IPL_DEPTH_8U, src->nChannels);
cvWarpAffine(src, dst, warp_mat/*, CV_INTER_LINEAR + CV_WARP_FILL_OUTLIERS, cvScalarAll(0)*/);
if (crop) // crop and resize to initial size
{
IplImage* dst_crop= cvCreateImage(cvSize(right-left, bottom-top), IPL_DEPTH_8U, src->nChannels);
cvSetImageROI(dst,cvRect(left,top,right-left,bottom-top));
cvCopy(dst,dst_crop);
cvReleaseImage(&dst);
cvReleaseMat(&warp_mat);
//ver1
//return dst_crop;
// ver2 resize
IplImage* out= cvCreateImage(cvSize(w, h), IPL_DEPTH_8U, src->nChannels);
cvResize(dst_crop,out);
cvReleaseImage(&dst_crop);
return out;
}
else
{
/*cvLine( dst, cvPoint(left,top),cvPoint(left, bottom), cvScalar(0, 0, 255, 0) ,1,CV_AA);
cvLine( dst, cvPoint(right,top),cvPoint(right, bottom), cvScalar(0, 0, 255, 0) ,1,CV_AA);
cvLine( dst, cvPoint(left,top),cvPoint(right, top), cvScalar(0, 0, 255, 0) ,1,CV_AA);
cvLine( dst, cvPoint(left,bottom),cvPoint(right, bottom), cvScalar(0, 0, 255, 0) ,1,CV_AA);*/
cvReleaseMat(&warp_mat);
return dst;
}
}
else
{
return NULL; //assert?
}
}