#include <dwt.hh>
Collaboration diagram for oln::transforms::dwt< I, K >:
Public Types | |
| typedef I | original_im_t |
| Exact of the image. | |
| typedef mlc::exact< I >::ret::value_type | original_im_value_t |
| Original data type of the image. | |
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typedef mute< I, ntg::float_d >::ret | trans_im_t |
| Type of the transformed image. | |
| typedef K::self_t | coeffs_t |
| Data type of coefficients. | |
Public Member Functions | |
| dwt (const original_im_t &im) | |
| Constructor from an image. | |
| const trans_im_t | transformed_image () const |
| Accessor to the transformed image. | |
| trans_im_t & | transformed_image () |
| Accessor to the transformed image. | |
| trans_im_t | transform (dwt_transform_type t=dwt_non_std, bool normalized=true, unsigned l=0) |
| Compute the dwt transform. | |
| trans_im_t | transform_inv (unsigned l=0) |
| Compute the invert dwt transform. | |
| template<class T1> mute< I, T1 >::ret | transform_inv (unsigned l=0) |
| Compute the invert dwt transform. | |
| I | Exact type of the image to process. |
| K | Type of coefficients. |
Definition at line 470 of file dwt.hh.
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Constructor from an image. Initialization of dwt transform.
Definition at line 486 of file dwt.hh. References oln::transforms::dwt< I, K >::original_im_t, oln::transforms::dwt< I, K >::original_im_value_t, and oln::transforms::dwt< I, K >::trans_im_t.
00486 : original_im(im)
00487 {
00488 ntg_is_a(original_im_value_t, ntg::real)::ensure();
00489
00490 im_size = im.size().nth(0);
00491 assertion(im_size >= coeffs.size());
00492 for (unsigned i = 1; i < original_im_t::dim; i++)
00493 assertion(im_size == static_cast<unsigned>(im.size().nth(i)));
00494
00495 max_level = static_cast<unsigned>(log(2 * im_size / coeffs.size()) /
00496 internal::ln_2_);
00497
00498 current_level = max_level;
00499
00500 assertion(!(im_size % (1 << max_level)));
00501
00502 trans_im = trans_im_t(im.size());
00503 }
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Compute the dwt transform.
Definition at line 532 of file dwt.hh. References oln::transforms::dwt< I, K >::trans_im_t.
00534 {
00535 if (l == 0) {
00536 l = max_level;
00537 current_level = max_level;
00538 } else {
00539 if (l > max_level)
00540 l = max_level;
00541 current_level = l;
00542 }
00543
00544 oln_iter_type(trans_im_t) it(trans_im);
00545
00546 if (normalized) {
00547 norm = pow(sqrt(2), original_im_t::dim * l);
00548 for_all(it)
00549 trans_im[it] = original_im[it] / norm;
00550 }
00551 else {
00552 norm = 1;
00553 for_all(it)
00554 trans_im[it] = original_im[it];
00555 }
00556
00557 unsigned lim = im_size >> (l - 1);
00558 transform_type = t;
00559
00560 internal::dwt_transform_(trans_im, lim, im_size, coeffs, t);
00561
00562 return trans_im;
00563 }
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Compute the invert dwt transform.
Definition at line 604 of file dwt.hh. References oln::transforms::dwt< I, K >::trans_im_t, and oln::transforms::dwt< I, K >::transform_inv().
00605 {
00606 ntg_is_a(T1, ntg::real)::ensure();
00607
00608 trans_im_t tmp_im = transform_inv(l);
00609 typename mute<I, T1>::ret new_im(tmp_im.size());
00610
00611 oln_iter_type(trans_im_t) it(tmp_im);
00612
00613 for_all(it)
00614 new_im[it] = (tmp_im[it] >= ntg_inf_val(T1) ?
00615 (tmp_im[it] <= ntg_sup_val(T1) ?
00616 tmp_im [it] :
00617 ntg_sup_val(T1)) :
00618 ntg_inf_val(T1));
00619 return new_im;
00620 }
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Compute the invert dwt transform.
Definition at line 570 of file dwt.hh. References oln::transforms::dwt< I, K >::trans_im_t. Referenced by oln::transforms::dwt< I, K >::transform_inv().
00571 {
00572 if (l == 0)
00573 l = current_level;
00574 else if (l > current_level)
00575 l = current_level;
00576
00577 trans_im_t new_im(trans_im.size());
00578 oln_iter_type(trans_im_t) it(trans_im);
00579
00580 if (norm != 1) {
00581 for_all(it)
00582 new_im[it] = trans_im[it] * norm;
00583 }
00584 else
00585 for_all(it)
00586 new_im[it] = trans_im[it];
00587
00588 unsigned lim1 = im_size >> (current_level - 1);
00589 unsigned lim2 = im_size >> (current_level - l);
00590
00591 internal::dwt_transform_inv_(new_im, lim1, lim2, coeffs, transform_type);
00592
00593 return new_im;
00594 }
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Accessor to the transformed image. Non const version. Definition at line 520 of file dwt.hh. References oln::transforms::dwt< I, K >::trans_im_t.
00521 {
00522 return trans_im;
00523 }
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Accessor to the transformed image. Const version. Definition at line 510 of file dwt.hh. References oln::transforms::dwt< I, K >::trans_im_t.
00511 {
00512 return trans_im;
00513 }
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1.3.6-20040222