void DiscretePeriodicWavelet::makeInverseTransform() { if (m_thresholdedSignal.empty()) { if (m_transformedSignal.empty()) { return; } idwt(m_transformedSignal, m_flag, toStdString(m_waveletFunction), m_outputSignal, m_length); return; } idwt(m_thresholdedSignal, m_flag, toStdString(m_waveletFunction), m_outputSignal, m_length); }
double spec_template::sample_theta_conditional_revprop_logpdf() { vector<double> Lbeta(L[0].size(),0); vector<double> meanvec(L[0].size(),0); MVprod(&L, &beta_draw, &Lbeta); double logprob=0; vector<double> var(psi_draw.size(),0); vector<double> meanbuf(pars.p); if(WAVELETS) { for(int i = 0; i < pars.p; i++) { var[i]=(1/(1+psi_draw[i])); meanbuf[i]=var[i]*(dataWy[i]-Lbeta[i]); } idwt(meanbuf, pars.levsize, pars.h_vec, meanvec); vector<double> y_draw(pars.n,0.0); idwt(theta_draw, pars.levsize, pars.h_vec, y_draw); for (int j = 0; j <pars.n; j++) { logprob=logprob+truncated_normal_logpdf(y_draw[j], meanvec[j], sqrt(Temp/lambda_draw), tau_draw[j]); } vector<double> addedpoints(pars.p-pars.n,0.0); MVprod(&vex,&meanbuf,&addedpoints); vector<double> tmp2(pars.p-pars.n,0.0); MVprod(&vex,&theta_draw,&tmp2); VVdif(&tmp2,&addedpoints, &tmp2); Vconstprod(&tmp2,sqrt(Temp/lambda_draw), &tmp2); for(int j = 0; j <pars.p-pars.n; j++) logprob+=normlogpdf(tmp2[j], 0, 1); } else { for(unsigned int i = 0; i<psi_draw.size(); i++) { var[i] = (1/(1 + psi_draw[i])); meanvec[i] = var[i]*(dataWy[i] - Lbeta[i]); } for (int j = 0; j < pars.p; j++) logprob=logprob+truncated_normal_logpdf(theta_draw[j], meanvec[j],sqrt(Temp*var[j]/lambda_draw), tau_draw[j]); } return logprob; }
/*! * Matlab MEX definition for the inverse discrete wavelet transform. * * @param nlhs number of items on left hand side of matlab call * @param plhs pointer to left hand side data structure * @param nrhs number of items on right hand side of matlab call * @param prhs pointer to right hand side data structure * */ void mexFunction(int nlhs, mxArray *plhs[], int nrhs, const mxArray *prhs[]) { double *x, *y; rwt_init_params params = rwt_matlab_init(nlhs, plhs, nrhs, prhs, INVERSE_DWT); y = mxGetPr(prhs[0]); x = mxGetPr(plhs[0]); plhs[1] = mxCreateDoubleMatrix(1, 1, mxREAL); *mxGetPr(plhs[1]) = params.levels; idwt(x, params.nrows, params.ncols, params.scalings, params.ncoeff, params.levels, y); }
int test_idwt() { #include "test/wavelet/data_idwt/idwt_include.snip" NUMTYPE *output; unsigned int coef_length, output_length, i, j; int retval = 1; for (j = 0; j < sizeof(results) / sizeof(MultiArray); j++) { coef_length = a_coefs[j].length; output_length = idwtResultLength( coef_length, COIF3.len_filter ); output = (NUMTYPE*) malloc( sizeof(NUMTYPE) * (output_length + 1) ); output[ output_length ] = 3.14; // Perform the inverset DWT. idwt( output, a_coefs[j].array, d_coefs[j].array, coef_length, COIF3 ); // Verify that all values are within an epsilon of expected values. for (i = 0; i < output_length; i++) { if (fabs(output[i] - results[j].array[i]) > EPSILON) { retval = 0; } } // Verify that the final value was not overwritten. if (output[output_length] != 3.14) { retval = 0; } // Free our allocated memory. free( output ); } return retval; }
int main(int argc, char *argv[]) { FILE *in = stdin; FILE *out = stdout; FILE *sig = NULL; char output_name[MAXPATHLEN] = "(stdout)"; char input_name[MAXPATHLEN] = "(stdin)"; char signature_name[MAXPATHLEN]; int i, c, w; int row; int n; double alpha = 0.0; double beta = 0.0; int filter = 0; int method = -1; int level = 0; char filter_name[MAXPATHLEN] = ""; int verbose = 0; gray **image; Image_tree dwts; gray maxval; int rows, cols, format; double *watermark; progname = argv[0]; pgm_init(&argc, argv); wm_init(); while ((c = getopt(argc, argv, "a:b:e:f:F:h?o:s:v:")) != EOF) { switch (c) { case 'a': alpha = atof(optarg); if (alpha <= 0.0) { fprintf(stderr, "%s: alpha factor %f out of range\n", progname, alpha); exit(1); } break; case 'b': beta = atof(optarg); if (beta <= 0.0) { fprintf(stderr, "%s: beta factor %f out of range\n", progname, beta); exit(1); } break; case 'e': method = atoi(optarg); if (method < 0) { fprintf(stderr, "%s: wavelet filtering method %d out of range\n", progname, method); exit(1); } break; case 'f': filter = atoi(optarg); if (filter <= 0) { fprintf(stderr, "%s: filter number %d out of range\n", progname, filter); exit(1); } break; case 'F': strcpy(filter_name, optarg); break; case 'h': case '?': usage(); break; case 'o': if ((out = fopen(optarg, "wb")) == NULL) { fprintf(stderr, "%s: unable to open output file %s\n", progname, optarg); exit(1); } strcpy(output_name, optarg); break; case 's': if ((sig = fopen(optarg, "r")) == NULL) { fprintf(stderr, "%s: unable to open signature file %s\n", progname, optarg); exit(1); } strcpy(signature_name, optarg); break; case 'v': verbose = atoi(optarg); if (verbose < 0) { fprintf(stderr, "%s: verbosity level %d out of range\n", progname, verbose); exit(1); } break; } } argc -= optind; argv += optind; if (argc > 1) { usage(); exit(1); } if (argc == 1 && *argv[0] != '-') { if ((in = fopen(argv[0], "rb")) == NULL) { fprintf(stderr, "%s: unable to open input file %s\n", progname, argv[0]); exit(1); } else strcpy(input_name, argv[0]); } if (sig) { char line[32]; fgets(line, sizeof(line), sig); if (strspn(line, "WGSG") >= 4) { fscanf(sig, "%d\n", &n); if (alpha == 0.0) fscanf(sig, "%lf\n", &alpha); else fscanf(sig, "%*f\n"); if (beta == 0.0) fscanf(sig, "%lf\n", &beta); else fscanf(sig, "%*f\n"); if (method < 0) fscanf(sig, "%d\n", &method); else fscanf(sig, "%*d\n"); if (filter == 0) fscanf(sig, "%d\n", &filter); else fscanf(sig, "%*d\n"); if (!strcmp(filter_name, "")) fscanf(sig, "%[^\n\r]\n", filter_name); else fscanf(sig, "%*[^\n\r]\n"); } else { fprintf(stderr, "%s: invalid signature file %s\n", progname, signature_name); exit(1); } } else { fprintf(stderr, "%s: signature file not specified, use -s file option\n", progname); exit(1); } watermark = malloc(n * sizeof(double)); for (i = 0; i < n; i++) fscanf(sig, "%lf\n", &watermark[i]); fclose(sig); pgm_readpgminit(in, &cols, &rows, &maxval, &format); image = pgm_allocarray(cols, rows); for (row = 0; row < rows; row++) pgm_readpgmrow(in, image[row], cols, maxval, format); fclose(in); // complete decomposition level = find_deepest_level(cols, rows) - 1; // wavelet transform init_dwt(cols, rows, filter_name, filter, level, method); #ifdef POLLEN_STUFF #include "pollen_stuff.c" #endif #ifdef PARAM_STUFF #include "param_stuff.c" #endif dwts = fdwt(image); // build tree for subband selection, calculate subband thresholds init_subbands(dwts); set_subbands_type_beta(HORIZONTAL, beta); set_subbands_type_beta(VERTICAL, beta); calc_subbands_threshold(); w = 0; while (w < n) { Subband_data s; // select subband with max. threshold s = select_subband(); if (verbose > 1) fprintf(stderr, "%s: selected subband %s%d, T=%lf, beta=%lf\n", progname, subband_name(s->type), s->level, s->T, s->beta); // watermark significant coefficients and set them selected // check is entire signature has been embedded c = select_subband_coeff(s); do { double p; if (c < 0) // no more significant coefficients in subband break; p = get_subband_coeff(s, c); if (p < s->Cmax) { if (verbose > 2) fprintf(stderr, "%s: embedding sig. coeff. #%d (= %lf)\n into %s%d coeff. #%d\n", progname, w, watermark[w], subband_name(s->type), s->level, c); p = p + alpha * s->beta * s->T * watermark[w]; set_subband_coeff(s, c, p); w++; } mark_subband_coeff(s, c); // select next significant coefficient c = select_subband_coeff_from(s, c); } while (w < n); // update subband threshold s->T /= 2.0; } free_subbands(); free(watermark); idwt(dwts, image); pgm_writepgminit(out, cols, rows, maxval, 0); for (row = 0; row < rows; row++) pgm_writepgmrow(out, image[row], cols, maxval, 0); fclose(out); pgm_freearray(image, rows); exit(0); }
int main(int argc, char *argv[]) { FILE *in = stdin; FILE *out = stdout; FILE *sig = NULL; char output_name[MAXPATHLEN] = "(stdout)"; char input_name[MAXPATHLEN] = "(stdin)"; char signature_name[MAXPATHLEN]; int c; int row, col; int n; double quality = 0.0; int filter = 0; int method = -1; int level = 0; char filter_name[MAXPATHLEN] = ""; int seed; int verbose = 0; gray **image; Image_tree dwts; gray maxval; int rows, cols, colors, format; progname = argv[0]; pgm_init(&argc, argv); #ifdef __EMX__ _fsetmode(in, "b"); _fsetmode(out, "b"); #endif while ((c = getopt(argc, argv, "e:f:F:h?l:o:q:s:v:")) != EOF) { switch (c) { case 'e': method = atoi(optarg); if (method < 0) { fprintf(stderr, "%s: wavelet filtering method %d out of range\n", progname, method); exit(1); } break; case 'f': filter = atoi(optarg); if (filter <= 0) { fprintf(stderr, "%s: filter number %d out of range\n", progname, filter); exit(1); } break; case 'F': strcpy(filter_name, optarg); break; case 'h': case '?': usage(); break; case 'l': level = atoi(optarg); if (level < 1) { fprintf(stderr, "%s: embedding level out of range\n", progname); exit(1); } break; case 'o': if ((out = fopen(optarg, "wb")) == NULL) { fprintf(stderr, "%s: unable to open output file %s\n", progname, optarg); exit(1); } strcpy(output_name, optarg); break; case 'q': quality = atoi(optarg); if (quality <= 0) { fprintf(stderr, "%s: quality factor %d out of range\n", progname, quality); exit(1); } break; case 's': if ((sig = fopen(optarg, "r")) == NULL) { fprintf(stderr, "%s: unable to open signature file %s\n", progname, optarg); exit(1); } strcpy(signature_name, optarg); break; case 'v': verbose = atoi(optarg); if (verbose < 0) { fprintf(stderr, "%s: verbosity level %d out of range\n", progname, verbose); exit(1); } break; } } argc -= optind; argv += optind; if (argc > 1) { usage(); exit(1); } if (argc == 1 && *argv[0] != '-') if ((in = fopen(argv[0], "rb")) == NULL) { fprintf(stderr, "%s: unable to open input file %s\n", progname, argv[0]); exit(1); } else strcpy(input_name, argv[0]); if (sig) { char line[32]; fgets(line, sizeof(line), sig); if (strspn(line, "KDSG") >= 4) { fscanf(sig, "%d\n", &n); if (quality == 0.0) fscanf(sig, "%lf\n", &quality); else fscanf(sig, "%*f\n"); if (method < 0) fscanf(sig, "%d\n", &method); else fscanf(sig, "%*d\n"); if (filter == 0) fscanf(sig, "%d\n", &filter); else fscanf(sig, "%*d\n"); if (!strcmp(filter_name, "")) fscanf(sig, "%[^\n\r]\n", filter_name); else fscanf(sig, "%*[^\n\r]\n"); if (level == 0) fscanf(sig, "%d\n", &level); else fscanf(sig, "%*d\n"); fscanf(sig, "%d\n", &seed); srandom(seed); n_signature = NBITSTOBYTES(nbit_signature); fread(signature, sizeof(char), n_signature, sig); fscanf(sig, "\n"); } else { fprintf(stderr, "%s: invalid signature file %s\n", progname, signature_name); exit(1); } fclose(sig); } else { fprintf(stderr, "%s: signature file not specified, use -s file option\n", progname); exit(1); } pgm_readpgminit(in, &cols, &rows, &maxval, &format); image = pgm_allocarray(cols, rows); for (row = 0; row < rows; row++) pgm_readpgmrow(in, image[row], cols, maxval, format); fclose(in); // check watermark dimensions and decomposition level // decomposition of image init_dwt(cols, rows, filter_name, filter, level, method); #ifdef POLLEN_STUFF { double alpha, beta; char *alpha_str = getenv("POLLEN_ALPHA"), *beta_str = getenv("POLLEN_BETA"); if (alpha_str && beta_str) { alpha = atof(alpha_str); beta = atof(beta_str); if (alpha < -M_PI || alpha >= M_PI) { fprintf(stderr, "%s: pollen - alpha %f out of range\n", progname, alpha); exit(1); } if (beta < -M_PI || beta >= M_PI) { fprintf(stderr, "%s: pollen - beta %f out of range\n", progname, beta); exit(1); } if (verbose > 7) fprintf(stderr, "%s: pollen - alpha %f, beta %f\n", progname, alpha, beta); dwt_pollen_filter(alpha, beta); } } #endif dwts = fdwt(image); // create 'image' from binary watermark // decomposition of watermark init_dwt(cols, rows, filter_name, filter, 1, method); // dwts = fdwt(watermark); // calculate mean value of image and set alpha // setup of contrast sensitivity matrix // segment detail images at each level // calculate DFT of each segment // compute salience for each segment // calculate gamma or each detail image // embed watermark // reconstruction of watermarked image idwt(dwts, image); pgm_writepgminit(out, cols, rows, maxval, 0); for (row = 0; row < rows; row++) pgm_writepgmrow(out, image[row], cols, maxval, 0); fclose(out); pgm_freearray(image, rows); exit(0); }
int main() { wave_object obj; wt_object wt; double *inp,*out,*diff; int N, i,J; FILE *ifp; double temp[1200]; char *name = "db4"; obj = wave_init(name);// Initialize the wavelet ifp = fopen(FILE_SIGNAL, "r"); i = 0; if (!ifp) { printf("Cannot Open File"); exit(100); } while (!feof(ifp)) { fscanf(ifp, "%lf \n", &temp[i]); i++; } N = 256; inp = (double*)malloc(sizeof(double)* N); out = (double*)malloc(sizeof(double)* N); diff = (double*)malloc(sizeof(double)* N); //wmean = mean(temp, N); for (i = 0; i < N; ++i) { inp[i] = temp[i]; //printf("%g \n",inp[i]); } J = 3; wt = wt_init(obj, "dwt", N, J);// Initialize the wavelet transform object setDWTExtension(wt, "sym");// Options are "per" and "sym". Symmetric is the default option setWTConv(wt, "direct"); dwt(wt, inp);// Perform DWT //DWT output can be accessed using wt->output vector. Use wt_summary to find out how to extract appx and detail coefficients for (i = 0; i < wt->outlength; ++i) { // printf("%g ",wt->output[i]); } idwt(wt, out);// Perform IDWT (if needed) // Test Reconstruction for (i = 0; i < wt->siglength; ++i) { diff[i] = out[i] - inp[i]; } printf("\n MAX %g \n", absmax(diff, wt->siglength)); // If Reconstruction succeeded then the output should be a small value. wt_summary(wt);// Prints the full summary. wave_free(obj); wt_free(wt); free(inp); free(out); free(diff); return 0; }
void ReconstructionTest() { wave_object obj; wt_object wt; double *inp,*out; int N, i,J; double epsilon = 1e-15; char *type = (char*) "dwt"; N = 79926; //N = 256; inp = (double*)malloc(sizeof(double)* N); out = (double*)malloc(sizeof(double)* N); //wmean = mean(temp, N); for (i = 0; i < N; ++i) { inp[i] = (rand() / (double)(RAND_MAX)); } std::vector<std::string > waveletNames; for (unsigned int j = 0; j < 36; j++) { waveletNames.push_back(std::string("db") + patch::to_string(j + 1)); } for (unsigned int j = 0; j < 17; j++) { waveletNames.push_back(std::string("coif") + patch::to_string(j + 1)); } for (unsigned int j = 1; j < 20; j++) { waveletNames.push_back(std::string("sym") + patch::to_string(j + 1)); } waveletNames.push_back("bior1.1"); waveletNames.push_back("bior1.3"); waveletNames.push_back("bior1.5"); waveletNames.push_back("bior2.2"); waveletNames.push_back("bior2.4"); waveletNames.push_back("bior2.6"); waveletNames.push_back("bior2.8"); waveletNames.push_back("bior3.1"); waveletNames.push_back("bior3.3"); waveletNames.push_back("bior3.5"); waveletNames.push_back("bior3.7"); waveletNames.push_back("bior3.9"); waveletNames.push_back("bior4.4"); waveletNames.push_back("bior5.5"); waveletNames.push_back("bior6.8"); waveletNames.push_back("rbior1.1"); waveletNames.push_back("rbior1.3"); waveletNames.push_back("rbior1.5"); waveletNames.push_back("rbior2.2"); waveletNames.push_back("rbior2.4"); waveletNames.push_back("rbior2.6"); waveletNames.push_back("rbior2.8"); waveletNames.push_back("rbior3.1"); waveletNames.push_back("rbior3.3"); waveletNames.push_back("rbior3.5"); waveletNames.push_back("rbior3.7"); waveletNames.push_back("rbior3.9"); waveletNames.push_back("rbior4.4"); waveletNames.push_back("rbior5.5"); waveletNames.push_back("rbior6.8"); for (unsigned int direct_fft = 0; direct_fft < 2; direct_fft++) { for (unsigned int sym_per = 0; sym_per < 2; sym_per++) { for (unsigned int j = 0; j < waveletNames.size(); j++) { char * name = new char[waveletNames[j].size() + 1]; memcpy(name, waveletNames[j].c_str(), waveletNames[j].size() + 1); obj = wave_init(name);// Initialize the wavelet for (J = 1; J < 3; J++) { //J = 3; wt = wt_init(obj,(char*) "dwt", N, J);// Initialize the wavelet transform object if (sym_per == 0) setDWTExtension(wt, (char*) "sym");// Options are "per" and "sym". Symmetric is the default option else setDWTExtension(wt, (char*) "per"); if (direct_fft == 0) setWTConv(wt, (char*) "direct"); else setWTConv(wt, (char*) "fft"); dwt(wt, inp);// Perform DWT idwt(wt, out);// Perform IDWT (if needed) // Test Reconstruction if (direct_fft == 0) epsilon = 1e-8; else epsilon = 1e-10; //BOOST_CHECK_SMALL(RMS_Error(out, inp, wt->siglength), epsilon); // If Reconstruction succeeded then the output should be a small value. //printf("%g ",RMS_Error(out, inp, wt->siglength)); if (RMS_Error(out, inp, wt->siglength) > epsilon) { printf("\n ERROR : DWT Reconstruction Unit Test Failed. Exiting. \n"); exit(-1); } wt_free(wt); } wave_free(obj); delete[] name; } } } free(out); free(inp); }