Proper way for creating mask for segmentation












0















Im creating the mask as follows for the sake of segmentation task.



lbl = load_img(im)
lbl = scipy.misc.imresize(lbl, (self.image_shape[1], self.image_shape[0]))

bg_color = np.array([255, 255, 255])
building_color = np.array([255, 0, 0])
road_color = np.array([0, 0, 255])

gt_bg = np.all(lbl == bg_color, axis=2)
building_bg = np.all(lbl == building_color, axis=2)
road_bg = np.all(lbl == road_color, axis=2)

building_bg = gt_bg.reshape(*building_bg.shape, 1)
road_bg = gt_bg.reshape(*road_bg.shape, 1)
gt_bg = gt_bg.reshape(*gt_bg.shape, 1)

lbl = np.concatenate((gt_bg, building_bg, road_bg), axis=2)

return np.array([lbl])


I'm trying to segment three attributes so there are three different pixel values. Is this still a correct way of creating mask? because the training loss tends to be less than 50.










share|improve this question























  • Hi, to create mask for segmentation, you don't want to use a RGB like format for the training. Usually, each class will have its own channel in the label tensor. That way, each pixel has its own class probabilities. Here : bg = [1, 0, 0]; building = [0, 1, 0]; road = [0, 0, 1]

    – Pierre-Nicolas Piquin
    yesterday


















0















Im creating the mask as follows for the sake of segmentation task.



lbl = load_img(im)
lbl = scipy.misc.imresize(lbl, (self.image_shape[1], self.image_shape[0]))

bg_color = np.array([255, 255, 255])
building_color = np.array([255, 0, 0])
road_color = np.array([0, 0, 255])

gt_bg = np.all(lbl == bg_color, axis=2)
building_bg = np.all(lbl == building_color, axis=2)
road_bg = np.all(lbl == road_color, axis=2)

building_bg = gt_bg.reshape(*building_bg.shape, 1)
road_bg = gt_bg.reshape(*road_bg.shape, 1)
gt_bg = gt_bg.reshape(*gt_bg.shape, 1)

lbl = np.concatenate((gt_bg, building_bg, road_bg), axis=2)

return np.array([lbl])


I'm trying to segment three attributes so there are three different pixel values. Is this still a correct way of creating mask? because the training loss tends to be less than 50.










share|improve this question























  • Hi, to create mask for segmentation, you don't want to use a RGB like format for the training. Usually, each class will have its own channel in the label tensor. That way, each pixel has its own class probabilities. Here : bg = [1, 0, 0]; building = [0, 1, 0]; road = [0, 0, 1]

    – Pierre-Nicolas Piquin
    yesterday
















0












0








0








Im creating the mask as follows for the sake of segmentation task.



lbl = load_img(im)
lbl = scipy.misc.imresize(lbl, (self.image_shape[1], self.image_shape[0]))

bg_color = np.array([255, 255, 255])
building_color = np.array([255, 0, 0])
road_color = np.array([0, 0, 255])

gt_bg = np.all(lbl == bg_color, axis=2)
building_bg = np.all(lbl == building_color, axis=2)
road_bg = np.all(lbl == road_color, axis=2)

building_bg = gt_bg.reshape(*building_bg.shape, 1)
road_bg = gt_bg.reshape(*road_bg.shape, 1)
gt_bg = gt_bg.reshape(*gt_bg.shape, 1)

lbl = np.concatenate((gt_bg, building_bg, road_bg), axis=2)

return np.array([lbl])


I'm trying to segment three attributes so there are three different pixel values. Is this still a correct way of creating mask? because the training loss tends to be less than 50.










share|improve this question














Im creating the mask as follows for the sake of segmentation task.



lbl = load_img(im)
lbl = scipy.misc.imresize(lbl, (self.image_shape[1], self.image_shape[0]))

bg_color = np.array([255, 255, 255])
building_color = np.array([255, 0, 0])
road_color = np.array([0, 0, 255])

gt_bg = np.all(lbl == bg_color, axis=2)
building_bg = np.all(lbl == building_color, axis=2)
road_bg = np.all(lbl == road_color, axis=2)

building_bg = gt_bg.reshape(*building_bg.shape, 1)
road_bg = gt_bg.reshape(*road_bg.shape, 1)
gt_bg = gt_bg.reshape(*gt_bg.shape, 1)

lbl = np.concatenate((gt_bg, building_bg, road_bg), axis=2)

return np.array([lbl])


I'm trying to segment three attributes so there are three different pixel values. Is this still a correct way of creating mask? because the training loss tends to be less than 50.







python tensorflow keras image-segmentation semantic-segmentation






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asked Jan 19 at 14:14









user1241241user1241241

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  • Hi, to create mask for segmentation, you don't want to use a RGB like format for the training. Usually, each class will have its own channel in the label tensor. That way, each pixel has its own class probabilities. Here : bg = [1, 0, 0]; building = [0, 1, 0]; road = [0, 0, 1]

    – Pierre-Nicolas Piquin
    yesterday





















  • Hi, to create mask for segmentation, you don't want to use a RGB like format for the training. Usually, each class will have its own channel in the label tensor. That way, each pixel has its own class probabilities. Here : bg = [1, 0, 0]; building = [0, 1, 0]; road = [0, 0, 1]

    – Pierre-Nicolas Piquin
    yesterday



















Hi, to create mask for segmentation, you don't want to use a RGB like format for the training. Usually, each class will have its own channel in the label tensor. That way, each pixel has its own class probabilities. Here : bg = [1, 0, 0]; building = [0, 1, 0]; road = [0, 0, 1]

– Pierre-Nicolas Piquin
yesterday







Hi, to create mask for segmentation, you don't want to use a RGB like format for the training. Usually, each class will have its own channel in the label tensor. That way, each pixel has its own class probabilities. Here : bg = [1, 0, 0]; building = [0, 1, 0]; road = [0, 0, 1]

– Pierre-Nicolas Piquin
yesterday














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