void update() {
cam->update();
if(cam->isFrameNew()) {
ofPixels& pix = cam->getPixels();
int skip = 2;
int range = mouseX / 25;
for(int y = 0; y < pix.getHeight(); y += skip) {
for(int x = 0; x < pix.getWidth(); x += skip) {
ofColor cur = pix.getColor(x, y);
ofColor result(0, 0, 0, 0);
if(cur.r < range || cur.r > 255-range) {
result.r = 255;
result.a = 255;
}
if(cur.g < range || cur.g > 255-range) {
result.g = 255;
result.a = 255;
}
if(cur.b < range || cur.b > 255-range) {
result.b = 255;
result.a = 255;
}
clipping.setColor(x, y, result);
}
}
clipping.update();
if(recording) {
string fn = "images/" + ofToString(frameCount, 6, '0') + ".jpg";
imageSaver.saveImage(pix, fn);
frameCount++;
}
}
}
void sobel(Field &field, ofImage &edges, ofPixels &pix) {
// Sobel gradient
#define VAL(x, y) pix.getColor(x, y).r
float mag;
for (int i = 1; i < 1023; ++i)
for (int j = 1; j < 767; ++j)
{
ofVec2f g(0, 0);
// left
g.y -= 2 * VAL(i - 1, j);
g.y -= VAL(i - 1, j - 1);
g.y -= VAL(i - 1, j + 1);
// right
g.y += 2 * VAL(i + 1, j);
g.y += VAL(i + 1, j - 1);
g.y += VAL(i + 1, j + 1);
// up
g.x += 2 * VAL(i, j - 1);
g.x += VAL(i - 1, j - 1);
g.x += VAL(i + 1, j - 1);
// down
g.x -= 2 * VAL(i, j + 1);
g.x -= VAL(i - 1, j + 1);
g.x -= VAL(i + 1, j + 1);
// uniform
if (g.x < 0)
g = -g;
if (g.x == 0)
g.y = fabs(g.y);
field.set(i, j, 50*g.normalized());
mag = abs(g.x) + abs(g.y);
edges.setColor(i, j, ofColor(mag));
}
}
void ofxBaseGui::loadStencilFromHex(ofImage& img, unsigned char* data) {
int width = img.getWidth();
int height = img.getHeight();
int i = 0;
ofColor on(255, 255);
ofColor off(255, 0);
for(int y = 0; y < height; y++) {
for(int x = 0; x < width; x++) {
int shift = i % 8;
int offset = i / 8;
bool cur = (data[offset] >> shift) & 1;
img.setColor(x, y, cur ? on : off);
i++;
}
}
img.update();
}
void faceColorToTexture(ofMesh& mesh, ofImage& image)
{
vector<ofFloatColor> &color = mesh.getColors();
int num_face = color.size() / 3;
int tex_size = ofNextPow2(ceil(sqrt(num_face)));
bool arb = ofGetUsingArbTex();
ofDisableArbTex();
image.allocate(tex_size, tex_size, OF_IMAGE_COLOR);
if (arb) ofEnableArbTex();
mesh.clearTexCoords();
image.getPixelsRef().set(0);
float texel_size = (1. / image.getWidth()) * 0.5;
for (int i = 0; i < num_face; i++)
{
int u = (i % tex_size);
int v = (i / tex_size);
ofColor c = color[i * 3];
image.setColor(u, v, c);
float uu = (float)u / image.getWidth() + texel_size;
float vv = (float)v / image.getHeight() + texel_size;
mesh.addTexCoord(ofVec2f(uu, vv));
mesh.addTexCoord(ofVec2f(uu, vv));
mesh.addTexCoord(ofVec2f(uu, vv));
}
image.update();
mesh.clearColors();
}
//--------------------------------------------------------------
void ofApp::draw(){
//Merci Ludo pour ton aide
currentFrame = vidGrabber.getPixelsRef();
currentFrameCopy.allocate(currentFrame.getWidth(), currentFrame.getHeight(), OF_IMAGE_GRAYSCALE);
for(int x=0 ; x < 256 ; x++) {
histogram[x] = 0;
}
for (int i = 0; i < camWidth; i++){
for (int j = 0; j < camHeight; j++){
int lightness = currentFrame.getColor(i,j).getLightness();
histogram[lightness] = histogram[lightness]+1;
ofColor pixel;
pixel.set(lightness, lightness, lightness);
currentFrame.setColor(i, j, pixel);
}
}
ofSetHexColor(0xffffff);
currentFrame.reloadTexture();
currentFrame.draw(0,0);
ofFill();
ofSetHexColor(0x000000);
ofSetPolyMode(OF_POLY_WINDING_ODD);
ofLine(770, 400, 770, 400-255);
ofLine(770, 400, 770+255, 400);
histogramMax = 0;
maxIndex = 0;
for(int x = 0 ; x < 256 ; x++) {
if (histogram[x]>histogramMax) {
histogramMax = histogram[x];
maxIndex = x;
}
histogram[x] = histogram[x]/100;
//cout << x << " : " << histogram[x] << "\n";
ofLine(x+770, 400-histogram[x], x+770, 400);
}
ofSetColor(255,0,0);
ofLine(maxIndex+770, 400-histogram[maxIndex], maxIndex+770, 400);
ofSetColor(0);
ofDrawBitmapString("Histogram : ", 770, 100);
ofDrawBitmapString("0 255 ", 770, 415);
ofDrawBitmapString("0", 755, 400);
ofDrawBitmapString("???", 773, 150);
threshold = 128;
for(int y = 0; y < camHeight; y++) {
for(int x = 0; x < camWidth; x++) {
ofColor cur = currentFrame.getColor(x, y);
int lightness = cur.getLightness();
ofColor pixel;
if (lightness<threshold) pixel.set(0, 0, 0);
else pixel.set(255, 255, 255);
currentFrameCopy.setColor(x, y, pixel);
}
}
ofSetColor(255);
currentFrameCopy.reloadTexture();
currentFrameCopy.draw(0, 480);
}
