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p6m tile perlmagick subprogram problem

https://imagemagick.com/discourse-server/viewtopic.php?t=24637

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p6m tile perlmagick subprogram problem

Posted: 2013-12-13T11:56:39-07:00
by gubach
Hello,

some years ago I wrote perl subprograms for the 17 eucledian symmetry groups. They worked sufficient for my art context but the groups based on non 90° and 45° angles have some minor artefacts. For one typ of those artefacts (black pixels at the edges were two triangles were composed) I have found workarounds but for an other type (it seems that some triangles are not accurately fitting but they were composed correctly) I could not solve it. Now I want to take those loose ends and solve this.

Below I have copied the code to a script with the p6m subprogram (based on the p3m1 tile type), were the remaining artefact can be easier be detected than in other tile types. I have also posted (temporary) 3 p6m tiles on http://www.flickr.com/photos/gbachelier were those artefacts can be seen.

Could someone help me with this?
Thank you very much!

Guenter




Code: Select all

#!/usr/bin/perl

# generating p6m tile on the basis of p3m1 tile

# goal is to avoid artefacts (not accurately fitting image parts)  
# - in $p6m_tile_part right in diagonal between G2 and G5_half
# - in $p6m_tile_row between p3m1_tile_part and p3m1_tile_part_flip



use diagnostics; use Image::Magick; srand; 

###NEW IM-OBJECTS #######################################################################################################################################################
my $image   				= new Image::Magick;			my $layer   				= new Image::Magick;
###NEW IM-OBJECTS #######################################################################################################################################################

my $input_image_path  = '/home/ ...'; 
my $outputfolder_path = '/home/...'; # path without a last "/ "


# READ IMAGE IN $layer
$image->Read("$input_image_path"); 

for ($t = 0; $t <= 2; $t++) {
	$layer = $image->Clone(); 
	# EXTRACT SQUARE
	($l_width, $l_height) = $layer->Get('columns', 'rows');
	if ($l_width >= $l_height) {
		$crop_value = $l_height;
		$x_rand = int(rand($l_width - $l_height));
		$layer->Crop(geometry=>"$crop_value x $crop_value +$x_rand +0"); 
	} else {
		$crop_value = $l_width;
		$y_rand = int(rand($l_height - $l_width));
		$layer->Crop(geometry=>"$crop_value x $crop_value +0 +$y_rand"); 
	}; 
	$layer->Set(page=>'0x0+0+0');
	# MAKE TILE
	& p6m; 
	$layer->Write(filename=>"$outputfolder_path/p6m_tile_$t.jpg", compression=>'JPEG', quality=>'95');
	# DELETE OBJECTS RELATED TO ITERATION $t
	@$layer = (); 
}; 


# SUBPROGRAMS **************************************************************************************************************************************
# **************************************************************************************************************************************************
# p6m
# **************************************************************************************************************************************************
# **************************************************************************************************************************************************

sub p6m {
	
	@_ = ($layer); 
	
	my($p6m_triangle_width, $p6m_triangle_height, $p3m1_G2_width_rotated, $p3m1_G2_cropwidth); 
	
	
	# RROGRAM ****************************************************************************************************
	$image_p6m = new Image::Magick; $p6m_mask = new Image::Magick; $transparent_extention = new Image::Magick;
	$image_p6m = $layer->Clone();																								#$image_p6m->Write(filename=>'image_p6m.jpg', compression=>'JPEG', quality=>'95');

	# GENERATE p6m_mask 
	($image_p6m_width, $image_p6m_height) = $image_p6m->Get('columns', 'rows'); print "sub(p6m): image_p6m_width=$image_p6m_width  image_p6m_height=$image_p6m_height \n";
	$p6m_triangle_height = $image_p6m_height; 
	$p6m_triangle_width  = int(1/sqrt(3) * $p6m_triangle_height)+1; 						print "sub(p6m): p6m_triangle_width=$p6m_triangle_width  p6m_triangle_height=$p6m_triangle_height \n";
	$p6m_mask->Set(size=>"$p6m_triangle_width x $p6m_triangle_height");
	$p6m_mask->Read('xc:none');
	$p6m_mask->Draw(primitive=>'polyline', points=>"0,0 $p6m_triangle_width,$p6m_triangle_height 0,$p6m_triangle_height", fill=>'red');
															#$p6m_mask->Write(filename=>'p6m_mask.jpg', compression=>'JPEG', quality=>'95');

	# GENERATE p6m_G1
	$p6m_G1 = $p6m_mask->Clone();
	$p6m_G1->Composite(image=>$image_p6m, compose=>'in', color=>'transparent', matte=>'true');
	$p6m_G1->Set(page=>'0x0+0+0');																							#$p6m_G1->Write(filename=>'p6m_G1.jpg', compression=>'JPEG', quality=>'95');
	
	# GENERATE p3m1_G4 (!!!!!p3m1 is right!!!!!) 
	$p6m_G1_flop = $p6m_G1->Clone();
	$p6m_G1_flop->Flop();
	$q = $p6m_G1_flop->Clone();
	push(@$q, $p6m_G1); 
	$p3m1_G4 = $q->Append(stack=>'false'); 						#$p3m1_G4->Write(filename=>'p3m1_p6m_G4.jpg', compression=>'JPEG', quality=>'95');
	
	# GENERATE p3m1_G1 (!!!!!p3m1 is right!!!!!) 
	$p3m1_G1 = $p3m1_G4->Clone();																								
	$p3m1_G1->Flip();							#$p3m1_G1->Write(filename=>'p3m1_p6m_G1.jpg', compression=>'JPEG', quality=>'95');
	
	# GENERATE p3m1_G2 (!!!!!p3m1 is right!!!!!)
	$p3m1_G2 = $p3m1_G1->Clone();
	$p3m1_G2->Flop();
	$p3m1_G2->Rotate(degrees=>60, color=>'transparent');
	$p3m1_G2->Set(page=>'0x0+0+0');
	$p3m1_G2_width_rotated = $p3m1_G2->Get('columns');
	$triangle_newwidth = 2 * $p6m_triangle_width;  
	$p3m1_G2_cropwidth = $p3m1_G2_width_rotated - $triangle_newwidth; 
	$p3m1_G2->Crop(geometry=>"$triangle_newwidth x $p6m_triangle_height + $p3m1_G2_cropwidth+0", background=>'transparent');
	$p3m1_G2->Set(page=>'0x0+0+0');																							#$p3m1_G2->Write(filename=>'p3m1_p6m_G2.jpg', compression=>'JPEG', quality=>'95');
	
	# GENERATE p3m1_G6 (!!!!!p3m1 is right!!!!!)	
	$p3m1_G6 = $p3m1_G1->Clone();
	$p3m1_G6->Flop();
	$p3m1_G6->Rotate(degrees=>-60, color=>'transparent');
	$p3m1_G6->Set(page=>'0x0+0+0');
	$p3m1_G6->Crop(geometry=>"$triangle_newwidth x $p6m_triangle_height+0+0", background=>'transparent');
	$p3m1_G6->Set(page=>'0x0+0+0');																							#$p3m1_G6->Write(filename=>'p3m1_p6m_G6.jpg', compression=>'JPEG', quality=>'95');
	
	# GENERATE p3m1_G5 (!!!!!p3m1 is right!!!!!)
	$p3m1_G5 = $p3m1_G6->Clone();
	$p3m1_G5->Flip();																														#$p3m1_G5->Write(filename=>'p3m1_p6m_G5.jpg', compression=>'JPEG', quality=>'95');
	
	# GENERATE p3m1_tile_part corrected (!!!!!p3m1 is right!!!!!) 
	$p3m1_G6h = $p3m1_G6->Clone();
	$p3m1_G6h->Crop(geometry=>"$p6m_triangle_width x $p6m_triangle_height + $p6m_triangle_width+0", background=>'transparent');
	$p3m1_G6h->Set(page=>'0x0+0+0');
	$p3m1_G6h_width = $p3m1_G6h->Get('columns');
	$p3m1_G6h_height = $p3m1_G6h->Get('rows');
	$p3m1_G6h_zoomwidth = $p3m1_G6h_width + 2; 
	$p3m1_G6h->Zoom(width=>"$p3m1_G6h_zoomwidth", height=>"$p3m1_G6h_height");
	$p3m1_tile_part = $p3m1_G1->Clone();
	#$p3m1_tile_part->Composite(image=>$p3m1_G6h, gravity=>'West', compose=>'over', color=>'transparent', matte=>'true');
	$p3m1_tile_part->Composite(image=>$p3m1_G6h, gravity=>'West', x => '-2', compose=>'over', color=>'transparent', matte=>'true'); #new!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
	$p3m1_tile_part->Set(page=>'0x0+0+0');
	$transparent_extention->Set(size=>"$p6m_triangle_width x $p6m_triangle_height");
	$transparent_extention->Read('xc:none');
	@$q = ();
	$q = $p3m1_tile_part->Clone();
	push(@$q, $transparent_extention); 
	$p3m1_tile_part = $q->Append(stack=>'false'); 
	$p3m1_tile_part->Composite(image=>$p3m1_G2, gravity=>'East', compose=>'over', color=>'transparent', matte=>'true');
	$p3m1_tile_part->Set(page=>'0x0+0+0');

	$p3m1_G5h = $p3m1_G5->Clone();
	$p3m1_G5h->Crop(geometry=>"$p6m_triangle_width x $p6m_triangle_height+0+0",background=>'transparent');
	$p3m1_G5h->Set(page=>'0x0+0+0');
	($p3m1_G5h_width, $p3m1_G5h_height) = $p3m1_G5h->Get('columns', 'rows');
	$p3m1_G5h_zoomwidth  = $p3m1_G5h_width  + 2; 
	$p3m1_G5h_zoomheight = $p3m1_G5h_height + 2;
	$p3m1_G5h->Zoom(width=>"$p3m1_G5h_zoomwidth", height=>"$p3m1_G5h_zoomheight");
	$p3m1_G5h->Set(page=>'0x0+0+0');
	#$p3m1_tile_part->Composite(image=>$p3m1_G5h, gravity=>'East', compose=>'over', color=>'transparent', matte=>'true');
	$p3m1_tile_part->Composite(image=>$p3m1_G5h, gravity=>'East', x => '+1', y => '+1', compose=>'over', color=>'transparent', matte=>'true'); #new!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
	$p3m1_tile_part->Set(page=>'0x0+0+0');																			
	my $p3m1_tile_part_w = $p3m1_tile_part->Get('columns'); #new!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
	$p3m1_tile_part->Crop(geometry=>"$p3m1_tile_part_w x $p6m_triangle_height+2+0",background=>'transparent');#new!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
	$p3m1_tile_part->Set(page=>'0x0+0+0');
																																					#$p3m1_tile_part->Write(filename=>"$outputfolder_path/p3m1_tile_part_$t.jpg", compression=>'JPEG', quality=>'95');
	
	# GENERATE p3m1_tile_part_flip (!!!!!p3m1 is right!!!!!) 
	$p3m1_tile_part_flip = $p3m1_tile_part->Clone();
	$p3m1_tile_part_flip->Flip();																								#$p3m1_tile_part_flip->Write(filename=>'p3m1_p6m_tile_part_flip.jpg', compression=>'JPEG', quality=>'95');
	
	# GENERATE p3m1_tile_row  (!!!!!p3m1 is right!!!!!) 
	@$q = ();
	$q = $p3m1_tile_part->Clone();
	push(@$q, $p3m1_tile_part_flip); 
	$p3m1_tile_row = $q->Append(stack=>'false'); 																#$p3m1_tile_row->Write(filename=>'p3m1_p6m_tile_row.jpg', compression=>'JPEG', quality=>'95');
	
	# GENERATE p3m1_tile_row_flip  (!!!!!p3m1 is right!!!!!) 
	$p3m1_tile_row_flip = $p3m1_tile_row->Clone();
	$p3m1_tile_row_flip->Flip();																								#$p3m1_tile_row_flip->Write(filename=>'p3m1_p6m_tile_row_flip.jpg', compression=>'JPEG', quality=>'95');
	
	# GENERATE p6m_tile
	@$q = ();
	$q = $p3m1_tile_row->Clone();
	push(@$q, $p3m1_tile_row_flip); 
	$p6m_tile = $q->Append(stack=>'true'); 													#$p6m_tile->Write(filename=>"$output_folder_path/p6m_$t _$resultimage_name", compression=>'JPEG', quality=>'95');
	@$layer = ();
	$layer = $p6m_tile->Clone();

	# OPTIONAL WRITING OF TILES
	#if ($write_tiles == 1) {$p6m_tile->Write(filename=>"$output_folder_path/p6m_$t _$resultimage_name", compression=>'JPEG', quality=>"$jpg_output_quality")};

	# EMPTY IMAGE OBJECTS RELATED TO SUBPROGRAM 
	@$p6m_mask            = (); @$image_p6m     = (); @$p6m_G1             = (); @$p3m1_G4   = (); @$p3m1_G1               = (); @$p3m1_G2        = ();
	@$p3m1_G5             = (); @$p3m1_G5h      = (); @$p3m1_G6            = (); @$p3m1_G6h  = (); @$transparent_extention = (); @$p3m1_tile_part = (); 
  @$p3m1_tile_part_flip = (); @$p3m1_tile_row = (); @$p3m1_tile_row_flip = (); @$p6m_tile  = ();
	# RROGRAM ****************************************************************************************************

	return($layer);

};
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