halcon基于形状的模板匹配第三例：rectify

这个例子其实是在比较两种ROI“还原”的方式；

模板匹配后，获得仿射变换矩阵T，则对于ROI的分析有两种：

1.全局的，将T.inv()*Img_target得到目标图片全局还原后的图片，在利用Region_Template，进行后续计算；

2.局部的，将T*Region_Template再对区域进行还原；

方法一计算量更大，但是Src简单，

* This example program shows how to rectify an image based on the matching
* results. The task is to extract and rectify the serial number on CDs.
* The recitification and extraction is shown in two different ways.
* In the first approach the full search image is rectified and then
* the numbers are extracted.
* In the second approach only the region of the numbers is rectified
* before the numbers are extracted.
*
*
dev_update_off ()
dev_close_window ()
*
* Read the model image and set visualization settings
read_image (ModelImage, 'cd_cover/cd_cover_01.png')
get_image_size (ModelImage, Width, Height)
dev_open_window (0, 0, Width, Height, 'black', WindowHandle)
set_display_font (WindowHandle, 16, 'mono', 'true', 'false')
dev_set_draw ('margin')
dev_set_line_width (2)
dev_display (ModelImage)
disp_message (WindowHandle, 'Model image', 'window', 12, 12, 'black', 'true')
disp_continue_message (WindowHandle, 'black', 'true')
stop ()
*
* Define the ROIs
* ---------------
* Select the ROI of the model object
Row1 := 96
Row2 := 149
Column1 := 87
Column2 := 179
gen_rectangle1 (ModelROI, Row1, Column1, Row2, Column2)
area_center (ModelROI, Area, CenterModelROIRow, CenterModelROIColumn)
dev_set_color ('blue')
dev_display (ModelROI)
disp_message (WindowHandle, 'ROI of the model', 'window', 40, 12, 'blue', 'true')
*
* Define the ROI of the numbers relative to the model object
gen_rectangle1 (NumberROI, Row2, Column1, Row2 + 30, Column2)
dev_set_color ('magenta')
dev_display (NumberROI)
disp_message (WindowHandle, 'ROI of the numbers', 'window', 60, 12, 'magenta', 'true')
stop ()
*
* Create the shape model
* -----------------------------------------------
reduce_domain (ModelImage, ModelROI, ImageReduced)
create_shape_model (ImageReduced, 4, 0, rad(360), 'auto', 'none', 'use_polarity', 30, 10, ModelID)
inspect_shape_model (ImageReduced, ShapeModelImage, ShapeModelRegion, 1, 50)
get_shape_model_contours (ShapeModel, ModelID, 1)
*
* Display the model contours
dev_set_color ('blue')
dev_set_line_width (1)
dev_display (ModelImage)
dev_display (ShapeModelRegion)
disp_message (WindowHandle, 'Model image', 'window', 12, 12, 'black', 'true')
disp_message (WindowHandle, 'Shape model', 'window', 40, 12, 'blue', 'true')
disp_continue_message (WindowHandle, 'black', 'true')
stop ()
*
* Display description
dev_clear_window ()
Message := 'The shape model has been successfully created.'
Message[1] := 'In the next step each image is searched for the'
Message[2] := 'best match of the shape model followed by a'
Message[3] := 'rectification based on the matching results'
Message[4] := 'and the extraction of the numbers.'
Message[5] := ' '
Message[6] := 'The rectification is demonstrated in two'
Message[7] := 'different ways:'
Message[8] := '- rectification of the full search image'
Message[9] := '- rectification of only the ROI of the numbers'
disp_message (WindowHandle, Message, 'window', 12, 12, 'black', 'true')
disp_continue_message (WindowHandle, 'black', 'true')
stop ()
*
* Find the object in each image and rectify the results
ImageFiles := 'cd_cover/cd_cover_'
for I := 1 to 4 by 1dev_set_line_width (1)* * Read the search image and search the best* match of the shape model in the search imageread_image (SearchImage, ImageFiles + I$'.2d')find_shape_model (SearchImage, ModelID, 0, rad(360), 0.7, 1, 0.5, 'least_squares', 0, 1, RowMatch, ColumnMatch, AngleMatch, Score)* * If a match was found, rectify the resultsif (|Score| > 0)* * Compute two affine transformations based on the position* of the new match:* --------------------------------------------------------* 'MovementOfModel' for the shape model and* 'MovementOfObject' for the rectification of the numbersvector_angle_to_rigid (0, 0, 0, RowMatch, ColumnMatch, AngleMatch, MovementOfModel)vector_angle_to_rigid (CenterModelROIRow, CenterModelROIColumn, 0, RowMatch, ColumnMatch, AngleMatch, MovementOfObject)* * Apply both affine transformations:* --------------------------------------------------------* one to the XLD contours of the shape model and* one to the ROI of the numbersaffine_trans_contour_xld (ShapeModel, ModelAtNewPosition, MovementOfModel)affine_trans_region (NumberROI, NumberROIAtNewPosition, MovementOfObject, 'nearest_neighbor')* * Display the model ROI and the ROI of the numbers at the (new)* position in which the match was found in the current search imagedev_display (SearchImage)dev_set_color ('blue')dev_display (ModelAtNewPosition)dev_set_color ('magenta')dev_set_line_width (2)dev_display (NumberROIAtNewPosition)disp_message (WindowHandle, 'Search image ' + I, 'window', 12, 12, 'black', 'true')disp_message (WindowHandle, 'Found match', 'window', 40, 12, 'blue', 'true')disp_message (WindowHandle, 'ROI of the numbers', 'window', 60, 12, 'magenta', 'true')disp_continue_message (WindowHandle, 'black', 'true')stop ()* * Approach 1: Rectification of the full search image* *********************************************************** First the full search image is rectified. Then the numbers* are extracted.* *********************************************************** * Step 1: Rectify search image* ----------------------------* Invert the transformation matrix 'MovementOfObject' computed* for the rectification of the numbers so it can be used for the* rectification of the full search imagehom_mat2d_invert (MovementOfObject, InverseMovementOfObject)affine_trans_image (SearchImage, RectifiedSearchImage, InverseMovementOfObject, 'constant', 'false')* * Display the rectified search image and the ROI of the numbersdev_clear_window ()dev_display (RectifiedSearchImage)dev_display (NumberROI)disp_message (WindowHandle, '1. Approach: Rectified search image ' + I, 'window', 12, 12, 'black', 'true')disp_message (WindowHandle, 'ROI of the numbers', 'window', 40, 12, 'magenta', 'true')disp_continue_message (WindowHandle, 'black', 'true')stop ()* * Step 2: Extract the numbers* ---------------------------* Reduce the domain of the rectified image to the region of the* numbers and extract the numbers using a global gray value tresholdreduce_domain (RectifiedSearchImage, NumberROI, RectifiedNumberROIImage)threshold (RectifiedNumberROIImage, Numbers, 0, 128)connection (Numbers, IndividualNumbers)* * Display the extracted numbers in the reduced rectified imagedev_set_colored (12)dev_set_draw ('fill')dev_display (IndividualNumbers)disp_message (WindowHandle, 'Extracted numbers', 'window', CenterModelROIRow, Column1 - 50, 'black', 'true')stop ()* * Approach 2: Rectify only the number ROI* ************************************************************ In this approach the search image is first cropped to the* region of the numbers. The new cropped search image is then* rectified and the numbers are extracted.* ************************************************************ * Display the original search image (no rectification) and* the corresponding ROI of the numbersdev_set_draw ('margin')dev_set_color ('magenta')dev_display (SearchImage)dev_display (NumberROIAtNewPosition)* * Step 1: Crop the search image* -----------------------------* Compute the smallest rectangle surrounding the ROI* of the numbers parallel to the coordinate axessmallest_rectangle1 (NumberROIAtNewPosition, RowRect1, ColumnRect1, RowRect2, ColumnRect2)dev_set_color ('lime green')disp_rectangle1 (WindowHandle, RowRect1, ColumnRect1, RowRect2, ColumnRect2)disp_message (WindowHandle, '2. Approach: Crop search image ' + I, 'window', 12, 12, 'black', 'true')disp_message (WindowHandle, 'ROI of the numbers', 'window', 40, 12, 'magenta', 'true')* * Crop the image to the determined rectangle around the numberscrop_rectangle1 (SearchImage, CroppedSearchImage, RowRect1, ColumnRect1, RowRect2, ColumnRect2)* * Open a new window displaying the cropped image of the numbersWidth2 := ColumnRect2 - ColumnRect1 + 1Height2 := RowRect2 - RowRect1 + 1dev_open_window (0, Width + 10, Width2, Height2, 'black', CroppedWindowHandle)dev_set_part (0, 0, Height2 - 1, Width2 - 1)dev_display (CroppedSearchImage)disp_rectangle1 (CroppedWindowHandle, 0, 0, Height2, Width2)* * Display the corresponding messageMessage := 'Cropped image part'Message[1] := '(See also the upper right window)'disp_message (WindowHandle, Message, 'window', 65, 12, 'lime green', 'true')disp_continue_message (WindowHandle, 'black', 'true')stop ()* * Step 2: Rectifiy the cropped search image* ------------------------------------------* Prepare the transformation matrix needed for the* rectification. Add the translation of the cropping to* the transformation matrix and then invert the matrix.hom_mat2d_translate (MovementOfObject, -RowRect1, -ColumnRect1, MoveAndCrop)hom_mat2d_invert (MoveAndCrop, InverseMoveAndCrop)* * Rectify the cropped search image using the* inverted transformation matrixaffine_trans_image (CroppedSearchImage, RectifiedROIImage, InverseMoveAndCrop, 'constant', 'true')* * Display the rectified cropped search image in a new windowget_image_size (RectifiedROIImage, Width3, Height3)dev_set_part (0, 0, Height3 - 1, Width3 - 1)dev_open_window (Height2 + 60, Width + 10, Width3, Height3, 'black', WindowHandle1)set_display_font (WindowHandle1, 11, 'mono', 'true', 'false')dev_clear_window ()dev_display (RectifiedROIImage)disp_message (WindowHandle1, 'Rectified cropped image', 'window', 5, 5, 'black', 'true')stop ()* * Step 3: Extract the numbers* ---------------------------* Reduce the domain of the rectified and cropped image to the region of* the numbers and extract the numbers using a global gray value tresholdreduce_domain (RectifiedROIImage, NumberROI, RectifiedNumberROIImage)threshold (RectifiedNumberROIImage, Numbers, 0, 128)connection (Numbers, IndividualNumbers)dev_clear_window ()dev_display (RectifiedNumberROIImage)dev_set_colored (12)dev_set_draw ('fill')dev_display (IndividualNumbers)disp_message (WindowHandle1, 'Extracted numbers', 'window', 5, 5, 'black', 'true')stop ()endifif (I < 4)dev_set_window (CroppedWindowHandle)dev_close_window ()dev_set_window (WindowHandle1)dev_close_window ()endif
endfor
disp_end_of_program_message (WindowHandle, 'black', 'true')
*
* Clear the model
clear_shape_model (ModelID)

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