void
ImageProcessing::drawRectangle( FrameBuffer * frame, Rect const & rect, RawPixel const & colour )
{
Point tl = const_cast<Rect &>(rect).topLeft();
Point br = const_cast<Rect &>(rect).bottomRight();
unsigned int tlx = tl.x();
unsigned int tly = tl.y();
unsigned int brx = br.x();
unsigned int bry = br.y();
drawBresenhamLine( frame, tlx, tly, brx, tly, colour );
drawBresenhamLine( frame, brx, tly, brx, bry, colour );
drawBresenhamLine( frame, brx, bry, tlx, bry, colour );
drawBresenhamLine( frame, tlx, bry, tlx, tly, colour );
}
void
renderGElement(XPM *canvas, GElement *el){
switch(el->type){
case LINE:
printf("Original Line := start{x:%4d y:%4d}, end{x:%4d y:%4d}\n", el->data.line.st.x, el->data.line.st.y, el->data.line.en.x, el->data.line.en.y);
if(cohenSutherlandFrameLine(canvas, &el->data.line.st, &el->data.line.en) == 1){
printf("Trimed Line := start{x:%4d y:%4d}, end{x:%4d y:%4d}\n", el->data.line.st.x, el->data.line.st.y, el->data.line.en.x, el->data.line.en.y);
drawBresenhamLine(canvas, el->data.line.st, el->data.line.en, 1);
}
else{
fprintf(stderr, "*** Line was totally outside the canvas.\n");
}
break;
default:
fprintf(stderr, "Unhandled type!\n");
break;
}
}
void drawScene(void) {
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glClearColor(0.0f, 0.0f, 0.0f, 1.0f);
glLoadIdentity();
glTranslatef(-1, -1, 0);
glPushMatrix();
glScalef((GLfloat) 2 / MATRIX_SIZE, (GLfloat) 2 / MATRIX_SIZE, 0);
glColor3f(0.7f, 0.7f, 0.7f);
for (int i = 0; i < MATRIX_SIZE; i++) {
for (int j = 0; j < MATRIX_SIZE; j++) {
glPushMatrix();
glTranslatef((GLfloat) i, (GLfloat) j, 0);
drawSquareBorder();
glPopMatrix();
}
}
glPopMatrix();
/* making sure we have both points set */
if (linex1 * liney1 * linex2 * liney2 > 0) {
drawBresenhamLine();
drawLine();
}
drawLinePoints();
drawDebugInfo();
glFlush();
}
void drawPendulum(pstate *states, int states_len) {
int left_loopings = 0, right_loopings = 0;
int green_color = COLOR_GREEN;
int red_color = COLOR_RED;
int blue_color = COLOR_BLUE;
// clear surface
if (whitebg) {
generic_surface_fill(sf, COLOR_WHITE);
green_color = 0xff009600;
red_color = 0xff960000;
blue_color = 0xff000096;
} else generic_surface_fill(sf, COLOR_BLACK);
// precompute scaling
double maxpendlength = l1 + l2b;
// this scale is in pixels per meter
double scale = (double)(sf->width < sf->height ? sf->width : sf->height) / 2.0 * (4.0/5.0) / maxpendlength;
// draw center (main axis of pendulum)
drawDot(sf, sf->width/2, sf->height/2, red_color);
// draw maximum reach of common axis and outer pendulum
drawCircle(sf, sf->width/2, sf->height/2, scale*l1, red_color);
drawCircle(sf, sf->width/2, sf->height/2, scale*(l1+l2b), red_color);
// draw data
int last_xpos, last_ypos, xpos, ypos;
int last_section, cur_section;
double xpos_, ypos_;
for (int i = 0; i < states_len; i++) {
pstate *s = &states[i];
pstateToCartesianEnd(s, &xpos_, &ypos_);
xpos = (int)(xpos_ * scale);
ypos = (int)(ypos_ * scale);
xpos += sf->width/2;
ypos += sf->height/2;
cur_section = s->phi2/(M_PI/2);
if (cur_section < 0) cur_section *= -1;
cur_section = cur_section%4;
assert(cur_section >= 0 && cur_section < 4);
if (i != 0) {
// the first point does not have a previous one
// to which we could draw a line, so ignore it
//fprintf(stderr, "(%d|%d)->(%d|%d)\n", last_xpos, last_ypos, xpos, ypos);
int color = green_color;
if (last_section == 1/*upper left*/ && cur_section == 2/*upper right*/) { color = red_color; right_loopings++; }
if (last_section == 2/*upper right*/ && cur_section == 1/*upper left*/) { color = blue_color; left_loopings++; }
if (show_normal_lines || color != green_color) {
drawBresenhamLine(sf, last_xpos, last_ypos, xpos, ypos, color);
}
}
last_xpos = xpos;
last_ypos = ypos;
last_section = cur_section;
}
fprintf(stderr, "pendulum rendered. %d loopings to the left, %d loopings to the right.\n", left_loopings, right_loopings);
}
void
ImageProcessing::drawBresenhamLine( FrameBuffer * frame, Point const start, Point const end, RawPixel const colour )
{
drawBresenhamLine( frame, start.x(), start.y(), end.x(), end.y(), colour );
}
void
ImageProcessing::SegmentColours( FrameBuffer * frame,
FrameBuffer * outFrame,
unsigned int threshold,
unsigned int minLength,
unsigned int minSize,
unsigned int subSample,
ColourDefinition const & target,
RawPixel const & mark,
std::vector<VisionObject> & results
)
{
FrameBufferIterator it( frame );
FrameBufferIterator oit( outFrame );
Pixel cPixel;
RawPixel oPixel;
// unsigned int len;
FloodFillState state;
unsigned int count;
for( unsigned int row = 0; row < frame->height; row = row + subSample )
{
it.goPosition(row, subSample);
oit.goPosition(row, subSample);
count = 0;
for( unsigned int col = subSample; col < frame->width; col = col + subSample, it.goRight( subSample ),oit.goRight( subSample ) )
{
oit.getPixel( & oPixel );
if ( oPixel == RawPixel( 0, 0, 0 ) )
{
it.getPixel( & cPixel );
if ( target.isMatch( cPixel ) )
{
count++;
}
else
{
count = 0;
}
if ( count >= minLength )
{
state.initialize();
doFloodFill( frame, outFrame, Point( col, row),
cPixel, threshold, & target,
subSample, & state );
#ifdef XX_DEBUG
if ( state.size() > minSize )
{
std::cout << "Flood fill returns size " << state.size() << std::endl;
}
#endif
if ( state.size() > minSize )
{
unsigned int tlx = state.bBox().topLeft().x();
unsigned int tly = state.bBox().topLeft().y();
unsigned int brx = state.bBox().bottomRight().x();
unsigned int bry = state.bBox().bottomRight().y();
drawBresenhamLine( outFrame, tlx, tly, tlx, bry, mark );
drawBresenhamLine( outFrame, tlx, bry, brx, bry, mark );
drawBresenhamLine( outFrame, brx, bry, brx, tly, mark );
drawBresenhamLine( outFrame, brx, tly, tlx, tly, mark );
drawBresenhamLine( frame, tlx, tly, tlx, bry, mark );
drawBresenhamLine( frame, tlx, bry, brx, bry, mark );
drawBresenhamLine( frame, brx, bry, brx, tly, mark );
drawBresenhamLine( frame, brx, tly, tlx, tly, mark );
// swapColours( outFrame, 0, state.bBox(), 1, ColourDefinition( Pixel(colour), Pixel(colour) ), state.averageColour() );
VisionObject vo( target.name, state.size(), state.x(), state.y(), state.averageColour(), state.bBox() );
std::vector<VisionObject>::iterator i;
for( i = results.begin();
i != results.end();
++i)
{
if ( (*i).size < vo.size )
{
break;
}
}
results.insert(i, vo );
}
count = 0;
}
}
else
{
count = 0;
}
}
}
}
void
ImageProcessing::segmentScanLines( FrameBuffer * frame,
FrameBuffer * outFrame,
unsigned int threshold,
unsigned int minLength,
unsigned int maxLength,
unsigned int minSize,
RawPixel const & mark,
unsigned int subSample,
ColourDefinition const * target )
{
FrameBufferIterator it( frame );
RawPixel pPixel;
RawPixel cPixel;
unsigned int startLine;
int diff;
unsigned int avgRed, avgGreen, avgBlue;
unsigned int len;
FloodFillState state;
for( unsigned int row = 0; row < frame->height; row = row + subSample )
{
it.goPosition( row, 0 );
it.getPixel( & pPixel ); // Extend to the left
startLine = 0;
avgRed = 0;
avgGreen = 0;
avgBlue = 0;
it.goPosition(row, subSample);
for( unsigned int col = subSample; col <= frame->width + subSample; col = col + subSample, it.goRight( subSample ) )
{
if ( col < frame->width )
{
it.getPixel( & cPixel );
diff = cPixel.diffIntensity( pPixel );
if ( diff < 0 )
{
diff = -diff;
}
}
if ( ( static_cast<unsigned int>(diff) > threshold ) || ( col >= static_cast<unsigned int>( frame->width - 1 ) ) )
{
len = col - startLine;
if ( ( len >= minLength ) && (len <= maxLength) )
{
Pixel colour( (subSample * avgRed ) / len,(subSample * avgGreen ) / len,(subSample * avgBlue ) / len);
if ( target == 0 )
{
FrameBufferIterator out( outFrame, row, startLine );
for( unsigned int i = startLine; i < col; i++, out.goRight() )
{
out.setPixel( colour );
}
}
else if (target->isMatch( colour ) )
{
state.initialize();
doFloodFill( frame, outFrame, Point( startLine, row), colour, threshold, target, 1, & state );
#ifdef XX_DEBUG
if ( state.size() > minSize )
{
std::cout << "Flood fill returns size " << state.size() << std::endl;
}
#endif
if ( state.size() > minSize )
{
unsigned int tlx = state.bBox().topLeft().x();
unsigned int tly = state.bBox().topLeft().y();
unsigned int brx = state.bBox().bottomRight().x();
unsigned int bry = state.bBox().bottomRight().y();
drawBresenhamLine( outFrame, tlx, tly, tlx, bry, mark );
drawBresenhamLine( outFrame, tlx, bry, brx, bry, mark );
drawBresenhamLine( outFrame, brx, bry, brx, tly, mark );
drawBresenhamLine( outFrame, brx, tly, tlx, tly, mark );
drawBresenhamLine( frame, tlx, tly, tlx, bry, mark );
drawBresenhamLine( frame, tlx, bry, brx, bry, mark );
drawBresenhamLine( frame, brx, bry, brx, tly, mark );
drawBresenhamLine( frame, brx, tly, tlx, tly, mark );
// swapColours( outFrame, 0, state.bBox(), 1, ColourDefinition( Pixel(colour), Pixel(colour) ), state.averageColour() );
}
}
}
avgRed = 0;
avgGreen = 0;
avgBlue = 0;
startLine = col;
}
else
{
avgRed = avgRed + cPixel.red;
avgGreen = avgGreen + cPixel.green;
avgBlue = avgBlue + cPixel.blue;
}
pPixel = cPixel;
}
}
}
