2 * Copyright (c) 2001-2002, David Janssens
3 * Copyright (c) 2002-2004, Yannick Verschueren
4 * Copyright (c) 2002-2004, Communications and remote sensing Laboratory, Universite catholique de Louvain, Belgium
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37 #define S(i) a[x*(i)*2]
38 #define D(i) a[x*(1+(i)*2)]
39 #define S_(i) ((i)<0?S(0):((i)>=sn?S(sn-1):S(i)))
40 #define D_(i) ((i)<0?D(0):((i)>=dn?D(dn-1):D(i)))
42 #define SS_(i) ((i)<0?S(0):((i)>=dn?S(dn-1):S(i)))
43 #define DD_(i) ((i)<0?D(0):((i)>=sn?D(sn-1):D(i)))
46 /* This table contains the norms of the 5-3 wavelets for different bands. */
48 double dwt_norms[4][10] = {
49 {1.000, 1.500, 2.750, 5.375, 10.68, 21.34, 42.67, 85.33, 170.7, 341.3},
50 {1.038, 1.592, 2.919, 5.703, 11.33, 22.64, 45.25, 90.48, 180.9},
51 {1.038, 1.592, 2.919, 5.703, 11.33, 22.64, 45.25, 90.48, 180.9},
52 {.7186, .9218, 1.586, 3.043, 6.019, 12.01, 24.00, 47.97, 95.93}
56 /* This table contains the norms of the 9-7 wavelets for different bands. */
58 double dwt_norms_real[4][10] = {
59 {1.000, 1.965, 4.177, 8.403, 16.90, 33.84, 67.69, 135.3, 270.6, 540.9},
60 {2.022, 3.989, 8.355, 17.04, 34.27, 68.63, 137.3, 274.6, 549.0},
61 {2.022, 3.989, 8.355, 17.04, 34.27, 68.63, 137.3, 274.6, 549.0},
62 {2.080, 3.865, 8.307, 17.18, 34.71, 69.59, 139.3, 278.6, 557.2}
67 static int lastSizeOfB = 0;
85 /* Forward lazy transform. */
87 void dwt_deinterleave(int *a, int n, int x, int res, int cas)
92 if (lastSizeOfB != n) {
95 b = (int *) malloc(n * sizeof(int));
100 for (i = 0; i < sn; i++)
101 b[i] = a[(2 * i + 1) * x];
102 for (i = 0; i < dn; i++)
103 b[sn + i] = a[2 * i * x];
105 for (i = 0; i < sn; i++)
107 for (i = 0; i < dn; i++)
108 b[sn + i] = a[(2 * i + 1) * x];
110 for (i = 0; i < n; i++)
115 /* Inverse lazy transform. */
117 void dwt_interleave(int *a, int n, int x, int res, int cas)
123 if (lastSizeOfB != n) {
126 b = (int *) malloc(n * sizeof(int));
131 for (i = 0; i < sn; i++)
132 b[2 * i + 1] = a[i * x];
133 for (i = 0; i < dn; i++)
134 b[2 * i] = a[(sn + i) * x];
136 for (i = 0; i < sn; i++)
138 for (i = 0; i < dn; i++)
139 b[2 * i + 1] = a[(sn + i) * x];
141 for (i = 0; i < n; i++)
146 /* Forward 5-3 wavelet tranform in 1-D. */
148 void dwt_encode_1(int *a, int n, int x, int res, int cas)
155 if (!sn && dn == 1) /* NEW : CASE ONE ELEMENT */
158 for (i = 0; i < dn; i++)
159 S(i) -= (DD_(i) + DD_(i - 1)) >> 1;
160 for (i = 0; i < sn; i++)
161 D(i) += (SS_(i) + SS_(i + 1) + 2) >> 2;
164 if ((dn > 0) || (sn > 1)) { /* NEW : CASE ONE ELEMENT */
165 for (i = 0; i < dn; i++)
166 D(i) -= (S_(i) + S_(i + 1)) >> 1;
167 for (i = 0; i < sn; i++)
168 S(i) += (D_(i - 1) + D_(i) + 2) >> 2;
171 dwt_deinterleave(a, n, x, res, cas);
175 /* Inverse 5-3 wavelet tranform in 1-D. */
177 void dwt_decode_1(int *a, int n, int x, int res, int cas)
183 dwt_interleave(a, n, x, res, cas);
185 if (!sn && dn == 1) /* NEW : CASE ONE ELEMENT */
188 for (i = 0; i < sn; i++)
189 D(i) -= (SS_(i) + SS_(i + 1) + 2) >> 2;
190 for (i = 0; i < dn; i++)
191 S(i) += (DD_(i) + DD_(i - 1)) >> 1;
194 if ((dn > 0) || (sn > 1)) { /* NEW : CASE ONE ELEMENT */
195 for (i = 0; i < sn; i++)
196 S(i) -= (D_(i - 1) + D_(i) + 2) >> 2;
197 for (i = 0; i < dn; i++)
198 D(i) += (S_(i) + S_(i + 1)) >> 1;
204 /* Forward 5-3 wavelet tranform in 2-D. */
206 void dwt_encode(int *a, int w, int h, tcd_tilecomp_t * tilec, int l)
209 int rw; /* width of the resolution level computed */
210 int rh; /* heigth of the resolution level computed */
211 int rw1; /* width of the resolution level once lower than computed one */
212 int rh1; /* height of the resolution level once lower than computed one */
214 for (i = 0; i < l; i++) {
215 int cas_col = 0; /* 0 = non inversion on horizontal filtering 1 = inversion between low-pass and high-pass filtering */
216 int cas_row = 0; /* 0 = non inversion on vertical filtering 1 = inversion between low-pass and high-pass filtering */
217 rw = tilec->resolutions[l - i].x1 - tilec->resolutions[l - i].x0;
218 rh = tilec->resolutions[l - i].y1 - tilec->resolutions[l - i].y0;
219 rw1 = tilec->resolutions[l - i - 1].x1 - tilec->resolutions[l - i - 1].x0;
220 rh1 = tilec->resolutions[l - i - 1].y1 - tilec->resolutions[l - i - 1].y0;
222 cas_row = tilec->resolutions[l - i].x0 % 2;
223 cas_col = tilec->resolutions[l - i].y0 % 2;
225 for (j = 0; j < rw; j++)
226 dwt_encode_1(a + j, rh, w, rh1, cas_col);
227 for (j = 0; j < rh; j++)
228 dwt_encode_1(a + j * w, rw, 1, rw1, cas_row);
235 /* Inverse 5-3 wavelet tranform in 2-D. */
237 void dwt_decode(int *a, int w, int h, tcd_tilecomp_t * tilec, int l, int stop)
240 int rw; /* width of the resolution level computed */
241 int rh; /* heigth of the resolution level computed */
242 int rw1; /* width of the resolution level once lower than computed one */
243 int rh1; /* height of the resolution level once lower than computed one */
245 for (i = l - 1; i >= stop; i--) {
246 int cas_col = 0; /* 0 = non inversion on horizontal filtering 1 = inversion between low-pass and high-pass filtering */
247 int cas_row = 0; /* 0 = non inversion on vertical filtering 1 = inversion between low-pass and high-pass filtering */
249 rw = tilec->resolutions[l - i].x1 - tilec->resolutions[l - i].x0;
250 rh = tilec->resolutions[l - i].y1 - tilec->resolutions[l - i].y0;
251 rw1 = tilec->resolutions[l - i - 1].x1 - tilec->resolutions[l - i - 1].x0;
252 rh1 = tilec->resolutions[l - i - 1].y1 - tilec->resolutions[l - i - 1].y0;
254 cas_row = tilec->resolutions[l - i].x0 % 2;
255 cas_col = tilec->resolutions[l - i].y0 % 2;
257 for (j = 0; j < rh; j++)
258 dwt_decode_1(a + j * w, rw, 1, rw1, cas_row);
259 for (j = 0; j < rw; j++)
260 dwt_decode_1(a + j, rh, w, rh1, cas_col);
266 /* Get gain of 5-3 wavelet transform. */
268 int dwt_getgain(int orient)
272 if (orient == 1 || orient == 2)
278 /* Get norm of 5-3 wavelet. */
280 double dwt_getnorm(int level, int orient)
282 return dwt_norms[orient][level];
286 /* Forward 9-7 wavelet transform in 1-D. */
288 void dwt_encode_1_real(int *a, int n, int x, int res, int cas)
295 if ((sn > 0) || (dn > 1)) { /* NEW : CASE ONE ELEMENT */
296 for (i = 0; i < dn; i++)
297 S(i) -= fix_mul(DD_(i) + DD_(i - 1), 12993);
298 for (i = 0; i < sn; i++)
299 D(i) -= fix_mul(SS_(i) + SS_(i + 1), 434);
300 for (i = 0; i < dn; i++)
301 S(i) += fix_mul(DD_(i) + DD_(i - 1), 7233);
302 for (i = 0; i < sn; i++)
303 D(i) += fix_mul(SS_(i) + SS_(i + 1), 3633);
304 for (i = 0; i < dn; i++)
305 S(i) = fix_mul(S(i), 5038); /*5038*/
306 for (i = 0; i < sn; i++)
307 D(i) = fix_mul(D(i), 6659); /*6660*/
310 if ((dn > 0) || (sn > 1)) { /* NEW : CASE ONE ELEMENT */
311 for (i = 0; i < dn; i++)
312 D(i) -= fix_mul(S_(i) + S_(i + 1), 12993);
313 for (i = 0; i < sn; i++)
314 S(i) -= fix_mul(D_(i - 1) + D_(i), 434);
315 for (i = 0; i < dn; i++)
316 D(i) += fix_mul(S_(i) + S_(i + 1), 7233);
317 for (i = 0; i < sn; i++)
318 S(i) += fix_mul(D_(i - 1) + D_(i), 3633);
319 for (i = 0; i < dn; i++)
320 D(i) = fix_mul(D(i), 5038); /*5038*/
321 for (i = 0; i < sn; i++)
322 S(i) = fix_mul(S(i), 6659); /*6660*/
325 dwt_deinterleave(a, n, x, res, cas);
329 /* Inverse 9-7 wavelet transform in 1-D. */
331 void dwt_decode_1_real(int *a, int n, int x, int res, int cas)
336 dwt_interleave(a, n, x, res, cas);
338 if ((sn > 0) || (dn > 1)) { /* NEW : CASE ONE ELEMENT */
339 for (i = 0; i < sn; i++)
340 D(i) = fix_mul(D(i), 10078); /* 10076 */
341 for (i = 0; i < dn; i++)
342 S(i) = fix_mul(S(i), 13318); /* 13320*/
343 for (i = 0; i < sn; i++)
344 D(i) -= fix_mul(SS_(i) + SS_(i + 1), 3633);
345 for (i = 0; i < dn; i++)
346 S(i) -= fix_mul(DD_(i) + DD_(i - 1), 7233);
347 for (i = 0; i < sn; i++)
348 D(i) += fix_mul(SS_(i) + SS_(i + 1), 434);
349 for (i = 0; i < dn; i++)
350 S(i) += fix_mul(DD_(i) + DD_(i - 1), 12993);
353 if ((dn > 0) || (sn > 1)) { /* NEW : CASE ONE ELEMENT */
354 for (i = 0; i < sn; i++)
355 S(i) = fix_mul(S(i), 10078); /* 10076 */
356 for (i = 0; i < dn; i++)
357 D(i) = fix_mul(D(i), 13318); /* 13320*/
358 for (i = 0; i < sn; i++)
359 S(i) -= fix_mul(D_(i - 1) + D_(i), 3633);
360 for (i = 0; i < dn; i++)
361 D(i) -= fix_mul(S_(i) + S_(i + 1), 7233);
362 for (i = 0; i < sn; i++)
363 S(i) += fix_mul(D_(i - 1) + D_(i), 434);
364 for (i = 0; i < dn; i++)
365 D(i) += fix_mul(S_(i) + S_(i + 1), 12993);
371 /* Forward 9-7 wavelet transform in 2-D. */
374 void dwt_encode_real(int *a, int w, int h, tcd_tilecomp_t * tilec, int l)
377 int rw; /* width of the resolution level computed */
378 int rh; /* heigth of the resolution level computed */
379 int rw1; /* width of the resolution level once lower than computed one */
380 int rh1; /* height of the resolution level once lower than computed one */
382 for (i = 0; i < l; i++) {
383 int cas_col = 0; /* 0 = non inversion on horizontal filtering 1 = inversion between low-pass and high-pass filtering */
384 int cas_row = 0; /* 0 = non inversion on vertical filtering 1 = inversion between low-pass and high-pass filtering */
385 rw = tilec->resolutions[l - i].x1 - tilec->resolutions[l - i].x0;
386 rh = tilec->resolutions[l - i].y1 - tilec->resolutions[l - i].y0;
387 rw1 = tilec->resolutions[l - i - 1].x1 - tilec->resolutions[l - i - 1].x0;
388 rh1 = tilec->resolutions[l - i - 1].y1 - tilec->resolutions[l - i - 1].y0;
390 cas_row = tilec->resolutions[l - i].x0 % 2;
391 cas_col = tilec->resolutions[l - i].y0 % 2;
393 for (j = 0; j < rw; j++)
394 dwt_encode_1_real(a + j, rh, w, rh1, cas_col);
395 for (j = 0; j < rh; j++)
396 dwt_encode_1_real(a + j * w, rw, 1, rw1, cas_row);
401 /* Inverse 9-7 wavelet transform in 2-D. */
403 void dwt_decode_real(int *a, int w, int h, tcd_tilecomp_t * tilec, int l, int stop)
406 int rw; /* width of the resolution level computed */
407 int rh; /* heigth of the resolution level computed */
408 int rw1; /* width of the resolution level once lower than computed one */
409 int rh1; /* height of the resolution level once lower than computed one */
411 for (i = l - 1; i >= stop; i--) {
412 int cas_col = 0; /* 0 = non inversion on horizontal filtering 1 = inversion between low-pass and high-pass filtering */
413 int cas_row = 0; /* 0 = non inversion on vertical filtering 1 = inversion between low-pass and high-pass filtering */
415 rw = tilec->resolutions[l - i].x1 - tilec->resolutions[l - i].x0;
416 rh = tilec->resolutions[l - i].y1 - tilec->resolutions[l - i].y0;
417 rw1 = tilec->resolutions[l - i - 1].x1 - tilec->resolutions[l - i - 1].x0;
418 rh1 = tilec->resolutions[l - i - 1].y1 - tilec->resolutions[l - i - 1].y0;
420 cas_row = tilec->resolutions[l - i].x0 % 2;
421 cas_col = tilec->resolutions[l - i].y0 % 2;
423 for (j = 0; j < rh; j++)
424 dwt_decode_1_real(a + j * w, rw, 1, rw1, cas_row);
425 for (j = 0; j < rw; j++)
426 dwt_decode_1_real(a + j, rh, w, rh1, cas_col);
431 /* Get gain of 9-7 wavelet transform. */
433 int dwt_getgain_real(int orient)
439 /* Get norm of 9-7 wavelet. */
441 double dwt_getnorm_real(int level, int orient)
443 return dwt_norms_real[orient][level];