def compute_boundary_distance(idx_row, params, path_out=''): """ compute nearest distance between two segmentation contours :param (int, str) idx_row: :param {} params: :param str path_out: :return (str, float): """ _, row = idx_row name = os.path.splitext(os.path.basename(row['path_image']))[0] img = load_image(row['path_image'], params['img_type']) segm = load_image(row['path_segm'], 'segm') logging.debug('segment SLIC...') slic = seg_spx.segment_slic_img2d(img, params['slic_size'], params['slic_regul'], params['slico']) _, dists = seg_lbs.compute_boundary_distances(segm, slic) if os.path.isdir(path_out): logging.debug('visualise results...') fig = tl_visu.figure_segm_boundary_dist(segm, slic) fig.savefig(os.path.join(path_out, name + '.jpg')) return name, np.mean(dists)
def load_image_annot_compute_features_labels(idx_row, params, show_debug_imgs=SHOW_DEBUG_IMAGES ): """ load image and annotation, and compute superpixel features and labels :param (int, {...}) idx_row: row from table with paths :param {str: ...} params: segmentation parameters :param bool show_debug_imgs: whether show debug images :return (...): """ def _path_out_img(params, dir_name, name): return os.path.join(params['path_exp'], dir_name, name + '.png') idx, row = idx_row idx_name = get_idx_name(idx, row['path_image']) img = load_image(row['path_image'], params['img_type']) annot = load_image(row['path_annot'], '2d_segm') logging.debug('.. processing: %s', idx_name) assert img.shape[:2] == annot.shape[:2], \ 'individual size of image %s and seg_pipe %s for "%s" - "%s"' % \ (repr(img.shape), repr(annot.shape), row['path_image'], row['path_annot']) if show_debug_imgs: plt.imsave(_path_out_img(params, FOLDER_IMAGE, idx_name), img, cmap=plt.cm.gray) plt.imsave(_path_out_img(params, FOLDER_ANNOT, idx_name), annot) # duplicate gray band to be as rgb # if img.ndim == 2: # img = np.rollaxis(np.tile(img, (3, 1, 1)), 0, 3) slic = seg_spx.segment_slic_img2d(img, sp_size=params['slic_size'], rltv_compact=params['slic_regul']) img = tl_data.convert_img_color_from_rgb(img, params.get('clr_space', 'rgb')) logging.debug('computed SLIC with %i labels', slic.max()) if show_debug_imgs: img_rgb = use_rgb_image(img) img_slic = segmentation.mark_boundaries(img_rgb, slic, color=(1, 0, 0), mode='subpixel') plt.imsave(_path_out_img(params, FOLDER_SLIC, idx_name), np.clip(img_slic, 0, 1)) slic_label_hist = seg_label.histogram_regions_labels_norm(slic, annot) labels = np.argmax(slic_label_hist, axis=1) slic_annot = labels[slic] if show_debug_imgs: plt.imsave(_path_out_img(params, FOLDER_SLIC_ANNOT, idx_name), np.clip(slic_annot, 0, slic_annot.max())) features, feature_names = seg_fts.compute_selected_features_img2d( img, slic, params['features']) return idx_name, img, annot, slic, features, labels, \ slic_label_hist, feature_names
def segment_image(imgs_idx_path, params, classif, path_out, path_visu=None, show_debug_imgs=SHOW_DEBUG_IMAGES): """ perform image segmentation on input image with given paramters and trained classifier, and save results :param (int, str) imgs_idx_path: :param {str: ...} params: segmentation parameters :param obj classif: trained classifier :param str path_out: path for output :param str path_visu: the existing patch means export also visualisation :param bool show_debug_imgs: whether show debug images :return (str, ndarray, ndarray): """ idx, path_img = parse_imgs_idx_path(imgs_idx_path) logging.debug('segmenting image: "%s"', path_img) idx_name = get_idx_name(idx, path_img) img = load_image(path_img, params['img_type']) debug_visual = dict() if show_debug_imgs else None gc_regul = params['gc_regul'] if params['gc_use_trans']: label_penalty = seg_gc.compute_pairwise_cost_from_transitions( params['label_transitions']) gc_regul = (gc_regul * label_penalty) segm_gc, segm_soft = seg_pipe.segment_color2d_slic_features_model_graphcut( img, classif, sp_size=params['slic_size'], sp_regul=params['slic_regul'], dict_features=params['features'], gc_regul=gc_regul, gc_edge_type=params['gc_edge_type'], debug_visual=debug_visual) segm_map = np.argmax(segm_soft, axis=-1) for segm, suffix in [(segm_gc, ''), (segm_map, '_MAP')]: path_img = os.path.join(path_out, idx_name + suffix + '.png') logging.debug('export segmentation: %s', path_img) if np.max(segm) <= 1: img_seg = Image.fromarray((segm * 255).astype(np.uint8)) else: img_seg = Image.fromarray(segm.astype(np.uint8)) img_seg.convert('L').save(path_img) # io.imsave(path_img, segm_gc) path_npz = os.path.join(path_out, idx_name + '.npz') np.savez_compressed(path_npz, segm_soft) # plt.imsave(os.path.join(path_out, idx_name + '_rgb.png'), seg_pipe) if params.get('visual', False) and path_visu is not None \ and os.path.isdir(path_visu): export_draw_image_segm_contour(img, segm_gc, path_visu, idx_name, '_GC') export_draw_image_segm_contour(img, segm_map, path_visu, idx_name, '_MAP') if show_debug_imgs and debug_visual is not None: path_fig = os.path.join(path_visu, str(idx_name) + '_debug.png') logging.debug('exporting (debug) visualization: %s', path_fig) fig = tl_visu.figure_segm_graphcut_debug(debug_visual) fig.savefig(path_fig, bbox_inches='tight', pad_inches=0.1) plt.close(fig) gc.collect() time.sleep(1) return idx_name, segm_map, segm_gc
def segment_image(imgs_idx_path, params, classif, path_out, path_visu=None, show_debug_imgs=SHOW_DEBUG_IMAGES): """ perform image segmentation on input image with given paramters and trained classifier, and save results :param (int, str) imgs_idx_path: :param {str: ...} params: segmentation parameters :param obj classif: trained classifier :param str path_out: path for output :param str path_visu: the existing patch means export also visualisation :return (str, ndarray, ndarray): """ idx, path_img = parse_imgs_idx_path(imgs_idx_path) logging.debug('segmenting image: "%s"', path_img) idx_name = get_idx_name(idx, path_img) img = load_image(path_img, params['img_type']) slic = seg_spx.segment_slic_img2d(img, sp_size=params['slic_size'], rltv_compact=params['slic_regul']) img = seg_pipe.convert_img_color_space(img, params.get('clr_space', 'rgb')) features, _ = seg_fts.compute_selected_features_img2d(img, slic, params['features']) labels = classif.predict(features) segm = labels[slic] path_img = os.path.join(path_out, idx_name + '.png') logging.debug('export segmentation: %s', path_img) img_seg = Image.fromarray(segm.astype(np.uint8)) img_seg.convert('L').save(path_img) # io.imsave(path_img, segm) # plt.imsave(os.path.join(path_out, idx_name + '_rgb.png'), seg_pipe) if path_visu is not None and os.path.isdir(path_visu): export_draw_image_segm_contour(img, segm, path_visu, idx_name) try: # in case some classiefier do not support predict_proba proba = classif.predict_proba(features) segm_soft = proba[slic] path_npz = os.path.join(path_out, idx_name + '.npz') np.savez_compressed(path_npz, segm_soft) except Exception: logging.warning('classif: %s not support predict_proba(.)', repr(classif)) proba = None segm_soft = None # if probabilities was not estimated of GC regul. is zero if proba is not None and params['gc_regul'] > 0: gc_regul = params['gc_regul'] if params['gc_use_trans']: label_penalty = seg_gc.compute_pairwise_cost_from_transitions( params['label_transitions']) gc_regul = (gc_regul * label_penalty) labels_gc = seg_gc.segment_graph_cut_general(slic, proba, img, features, gc_regul, edge_type=params['gc_edge_type']) # labels_gc = seg_gc.segment_graph_cut_simple(slic, proba, gc_regul) segm_gc = labels_gc[slic] # relabel according classif classes segm_gc = classif.classes_[segm_gc] path_img = os.path.join(path_out, idx_name + '_gc.png') logging.debug('export segmentation: %s', path_img) img_seg_gc = Image.fromarray(segm_gc.astype(np.uint8)) img_seg_gc.convert('L').save(path_img) # io.imsave(path_img, segm_gc) if path_visu is not None and os.path.isdir(path_visu): export_draw_image_segm_contour(img, segm_gc, path_visu, idx_name, '_gc') if show_debug_imgs: labels_map = np.argmax(proba, axis=1) plt.imsave(os.path.join(path_visu, idx_name + '_map.png'), labels_map[slic]) if not segm_soft is None: for lb in range(segm_soft.shape[2]): uc_name = idx_name + '_gc_unary-lb%i.png' % lb plt.imsave(os.path.join(path_visu, uc_name), segm_soft[:, :, lb], vmin=0., vmax=1., cmap=plt.cm.Greens) else: segm_gc = np.zeros(segm.shape) # gc.collect(), time.sleep(1) return idx_name, segm, segm_gc