New file |
| | |
| | | import cv2 |
| | | import numpy as np |
| | | from skimage import morphology,img_as_ubyte |
| | | |
| | | """ |
| | | (1) The text is an array of chars (in row-major order) where |
| | | * each char can be one of the following: |
| | | * 'x': hit |
| | | * 'o': miss |
| | | * ' ': don't-care |
| | | * (2) When the origin falls on a hit or miss, use an upper case |
| | | * char (e.g., 'X' or 'O') to indicate it. When the origin |
| | | * falls on a don't-care, indicate this with a 'C'. |
| | | * The string must have exactly one origin specified. |
| | | * (3) The advantage of this method is that the text can be input |
| | | * in a format that shows the 2D layout of the Sel; e.g., |
| | | |
| | | |
| | | :::: AND :::: |
| | | |
| | | |
| | | (10) The sequence string is formatted as follows: |
| | | * ~ An arbitrary number of operations, each separated |
| | | * by a '+' character. White space is ignored. |
| | | * ~ Each operation begins with a case-independent character |
| | | * specifying the operation: |
| | | * d or D (dilation) |
| | | * e or E (erosion) |
| | | * o or O (opening) |
| | | * c or C (closing) |
| | | * r or R (rank binary reduction) |
| | | * x or X (replicative binary expansion) |
| | | * b or B (add a border of 0 pixels of this size) |
| | | * ~ The args to the morphological operations are bricks of hits, |
| | | * and are formatted as a.b, where a and b are horizontal and |
| | | * vertical dimensions, rsp. |
| | | * ~ The args to the reduction are a sequence of up to 4 integers, |
| | | * each from 1 to 4. |
| | | * ~ The arg to the expansion is a power of two, in the set |
| | | * {2, 4, 8, 16}. |
| | | * (11) An example valid sequence is: |
| | | * "b32 + o1.3 + C3.1 + r23 + e2.2 + D3.2 + X4" |
| | | * In this example, the following operation sequence is carried out: |
| | | * * b32: Add a 32 pixel border around the input image |
| | | * * o1.3: Opening with vert sel of length 3 (e.g., 1 x 3) |
| | | * * C3.1: Closing with horiz sel of length 3 (e.g., 3 x 1) |
| | | * * r23: Two successive 2x2 reductions with rank 2 in the first |
| | | * and rank 3 in the second. The result is a 4x reduced pix. |
| | | * * e2.2: Erosion with a 2x2 sel (origin will be at x,y: 0,0) |
| | | * * d3.2: Dilation with a 3x2 sel (origin will be at x,y: 1,0) |
| | | * * X4: 4x replicative expansion, back to original resolution |
| | | |
| | | """ |
| | | |
| | | |
| | | def kernel(x, y): |
| | | return np.ones((x, y), np.uint8) |
| | | |
| | | |
| | | def enhanceSID(image): |
| | | image=255-image |
| | | image=img_as_ubyte(image>100) |
| | | cv2.imwrite("enSID0.png", image) |
| | | # Remove noise |
| | | image = cv2.morphologyEx(image, cv2.MORPH_OPEN, kernel(2,2), iterations=1) |
| | | # Closing. Connect non connected parts |
| | | image = cv2.morphologyEx(image, cv2.MORPH_CLOSE, kernel(5, 5), iterations=2) |
| | | # Again noise removal after closing |
| | | image = cv2.morphologyEx(image, cv2.MORPH_OPEN, kernel(8,8), iterations=1) |
| | | # Skeletonization |
| | | ##For thinning I am using erosion |
| | | ##image = cv2.erode(image,kernel(4,4),iterations = 40) |
| | | image = img_as_ubyte(morphology.thin(image>128)) |
| | | cv2.imwrite("enSID1.png",image) |
| | | # Stub removal (might not be necessary if thinning instead of skeletonize is used above |
| | | # Making lines stronger |
| | | image = cv2.morphologyEx(image, cv2.MORPH_DILATE, kernel(5, 5), iterations=1) |
| | | |
| | | image = cv2.morphologyEx(image, cv2.MORPH_CLOSE, kernel(10, 10)) |
| | | # Thining again |
| | | image = img_as_ubyte(morphology.skeletonize(image>0.5)) |
| | | image = cv2.morphologyEx(image, cv2.MORPH_DILATE, kernel(10, 10)) |
| | | return image |