Canny edge detector: Difference between revisions

Canny edge detector (view source)

Revision as of 23:00, 27 December 2021

17,181 bytes added , 2 years ago

→‎{{header|Phix}}: ported win-32-bit-only to pGUI to make it win/lnx, 32/64 compatible, and now with some actual code.

Petelomax

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Revision as of 09:54, 27 December 2021 (view source) Petelomax (talk \| contribs) m (→‎{{header\|Java}}: added google xlate of intro) ← Older edit		Revision as of 23:00, 27 December 2021 (view source) Petelomax (talk \| contribs) (→‎{{header\|Phix}}: ported win-32-bit-only to pGUI to make it win/lnx, 32/64 compatible, and now with some actual code.) Newer edit →
Line 1,730: =={{header\|Phix}}== {{libheader\|Phix/pGUI}} ~~{{improve\|Phix\|Port to pGUI for linux and 64 bit compatibility.}}~~ ~~The~~Ported ~~file~~from demo\Arwen32dibdemo\manip.exw ~~in the standard distribution contains a~~ (menu entry ~~for this,~~ Manipulate/Filter/Detect Edges, ~~along with 15 or so other effects. It is however~~ windows-32-bit only~~, and could do with being ported~~) to pGUI. <!--<lang Phix>(notonline)--> <span style="color: #000080;font-style:italic;">-- -- demo\rosetta\Canny_Edge_Detection.exw -- ===================================== --</span> <span style="color: #008080;">without</span> <span style="color: #008080;">js</span> <span style="color: #000080;font-style:italic;">-- imImage, im_width, im_height, im_pixel, IupImageRGB, -- imFileImageLoadBitmap, and IupImageFromImImage()</span> <span style="color: #008080;">include</span> <span style="color: #000000;">pGUI</span><span style="color: #0000FF;">.</span><span style="color: #000000;">e</span> <span style="color: #008080;">constant</span> <span style="color: #000000;">TITLE</span> <span style="color: #0000FF;">=</span> <span style="color: #008000;">"Canny Edge Detection"</span><span style="color: #0000FF;">,</span> <span style="color: #000000;">IMGFILE</span> <span style="color: #0000FF;">=</span> <span style="color: #008000;">"Valve.png"</span><span style="color: #0000FF;">,</span> <span style="color: #000000;">C_E_D</span> <span style="color: #0000FF;">=</span> <span style="color: #0000FF;">{{-</span><span style="color: #000000;">1</span><span style="color: #0000FF;">,</span> <span style="color: #0000FF;">-</span><span style="color: #000000;">1</span><span style="color: #0000FF;">,</span> <span style="color: #0000FF;">-</span><span style="color: #000000;">1</span><span style="color: #0000FF;">},</span> <span style="color: #0000FF;">{-</span><span style="color: #000000;">1</span><span style="color: #0000FF;">,</span> <span style="color: #000000;">8</span><span style="color: #0000FF;">,</span> <span style="color: #0000FF;">-</span><span style="color: #000000;">1</span><span style="color: #0000FF;">},</span> <span style="color: #0000FF;">{-</span><span style="color: #000000;">1</span><span style="color: #0000FF;">,</span> <span style="color: #0000FF;">-</span><span style="color: #000000;">1</span><span style="color: #0000FF;">,</span> <span style="color: #0000FF;">-</span><span style="color: #000000;">1</span><span style="color: #0000FF;">}}</span> <span style="color: #008080;">function</span> <span style="color: #000000;">detect_edges</span><span style="color: #0000FF;">(</span><span style="color: #000000;">imImage</span> <span style="color: #000000;">img</span><span style="color: #0000FF;">)</span> <span style="color: #004080;">integer</span> <span style="color: #000000;">width</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">im_width</span><span style="color: #0000FF;">(</span><span style="color: #000000;">img</span><span style="color: #0000FF;">),</span> <span style="color: #000000;">height</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">im_height</span><span style="color: #0000FF;">(</span><span style="color: #000000;">img</span><span style="color: #0000FF;">)</span> <span style="color: #004080;">sequence</span> <span style="color: #000000;">original</span> <span style="color: #0000FF;">=</span> <span style="color: #7060A8;">repeat</span><span style="color: #0000FF;">(</span><span style="color: #7060A8;">repeat</span><span style="color: #0000FF;">(</span><span style="color: #000000;">0</span><span style="color: #0000FF;">,</span><span style="color: #000000;">width</span><span style="color: #0000FF;">),</span><span style="color: #000000;">height</span><span style="color: #0000FF;">)</span> <span style="color: #004080;">integer</span> <span style="color: #000000;">fh</span> <span style="color: #0000FF;">=</span> <span style="color: #7060A8;">length</span><span style="color: #0000FF;">(</span><span style="color: #000000;">C_E_D</span><span style="color: #0000FF;">),</span> <span style="color: #000000;">hh</span><span style="color: #0000FF;">=(</span><span style="color: #000000;">fh</span><span style="color: #0000FF;">-</span><span style="color: #000000;">1</span><span style="color: #0000FF;">)/</span><span style="color: #000000;">2</span><span style="color: #0000FF;">,</span> <span style="color: #000000;">fw</span> <span style="color: #0000FF;">=</span> <span style="color: #7060A8;">length</span><span style="color: #0000FF;">(</span><span style="color: #000000;">C_E_D</span><span style="color: #0000FF;">[</span><span style="color: #000000;">1</span><span style="color: #0000FF;">]),</span> <span style="color: #000000;">hw</span><span style="color: #0000FF;">=(</span><span style="color: #000000;">fw</span><span style="color: #0000FF;">-</span><span style="color: #000000;">1</span><span style="color: #0000FF;">)/</span><span style="color: #000000;">2</span><span style="color: #0000FF;">,</span> <span style="color: #000000;">divisor</span> <span style="color: #0000FF;">=</span> <span style="color: #7060A8;">max</span><span style="color: #0000FF;">(</span><span style="color: #7060A8;">sum</span><span style="color: #0000FF;">(</span><span style="color: #000000;">C_E_D</span><span style="color: #0000FF;">),</span><span style="color: #000000;">1</span><span style="color: #0000FF;">)</span> <span style="color: #000080;font-style:italic;">-- read original pixels and make them grey,</span> <span style="color: #008080;">for</span> <span style="color: #000000;">y</span><span style="color: #0000FF;">=</span><span style="color: #000000;">height</span><span style="color: #0000FF;">-</span><span style="color: #000000;">1</span> <span style="color: #008080;">to</span> <span style="color: #000000;">0</span> <span style="color: #008080;">by</span> <span style="color: #0000FF;">-</span><span style="color: #000000;">1</span> <span style="color: #008080;">do</span> <span style="color: #008080;">for</span> <span style="color: #000000;">x</span><span style="color: #0000FF;">=</span><span style="color: #000000;">0</span> <span style="color: #008080;">to</span> <span style="color: #000000;">width</span><span style="color: #0000FF;">-</span><span style="color: #000000;">1</span> <span style="color: #008080;">do</span> <span style="color: #004080;">integer</span> <span style="color: #0000FF;">{</span><span style="color: #000000;">c1</span><span style="color: #0000FF;">,</span><span style="color: #000000;">c2</span><span style="color: #0000FF;">,</span><span style="color: #000000;">c3</span><span style="color: #0000FF;">}</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">im_pixel</span><span style="color: #0000FF;">(</span><span style="color: #000000;">img</span><span style="color: #0000FF;">,</span> <span style="color: #000000;">x</span><span style="color: #0000FF;">,</span> <span style="color: #000000;">y</span><span style="color: #0000FF;">),</span> <span style="color: #000000;">grey</span> <span style="color: #0000FF;">=</span> <span style="color: #7060A8;">floor</span><span style="color: #0000FF;">((</span><span style="color: #000000;">c1</span><span style="color: #0000FF;"></span><span style="color: #000000;">114</span><span style="color: #0000FF;">+</span><span style="color: #000000;">c2</span><span style="color: #0000FF;"></span><span style="color: #000000;">587</span><span style="color: #0000FF;">+</span><span style="color: #000000;">c3</span><span style="color: #0000FF;">*</span><span style="color: #000000;">299</span><span style="color: #0000FF;">)/</span><span style="color: #000000;">1000</span><span style="color: #0000FF;">)</span> <span style="color: #000000;">original</span><span style="color: #0000FF;">[</span><span style="color: #000000;">height</span><span style="color: #0000FF;">-</span><span style="color: #000000;">y</span><span style="color: #0000FF;">,</span><span style="color: #000000;">x</span><span style="color: #0000FF;">+</span><span style="color: #000000;">1</span><span style="color: #0000FF;">]</span> <span style="color: #0000FF;">=</span> <span style="color: #0000FF;">{</span><span style="color: #000000;">grey</span><span style="color: #0000FF;">,</span><span style="color: #000000;">grey</span><span style="color: #0000FF;">,</span><span style="color: #000000;">grey</span><span style="color: #0000FF;">}</span> <span style="color: #008080;">end</span> <span style="color: #008080;">for</span> <span style="color: #008080;">end</span> <span style="color: #008080;">for</span> <span style="color: #000080;font-style:italic;">-- then apply an edge detection filter</span> <span style="color: #004080;">sequence</span> <span style="color: #000000;">new_image</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">original</span> <span style="color: #008080;">for</span> <span style="color: #000000;">y</span><span style="color: #0000FF;">=</span><span style="color: #000000;">hh</span><span style="color: #0000FF;">+</span><span style="color: #000000;">1</span> <span style="color: #008080;">to</span> <span style="color: #000000;">height</span><span style="color: #0000FF;">-</span><span style="color: #000000;">hh</span><span style="color: #0000FF;">-</span><span style="color: #000000;">1</span> <span style="color: #008080;">do</span> <span style="color: #008080;">for</span> <span style="color: #000000;">x</span><span style="color: #0000FF;">=</span><span style="color: #000000;">hw</span><span style="color: #0000FF;">+</span><span style="color: #000000;">1</span> <span style="color: #008080;">to</span> <span style="color: #000000;">width</span><span style="color: #0000FF;">-</span><span style="color: #000000;">hw</span><span style="color: #0000FF;">-</span><span style="color: #000000;">1</span> <span style="color: #008080;">do</span> <span style="color: #004080;">sequence</span> <span style="color: #000000;">newrgb</span> <span style="color: #0000FF;">=</span> <span style="color: #0000FF;">{</span><span style="color: #000000;">0</span><span style="color: #0000FF;">,</span><span style="color: #000000;">0</span><span style="color: #0000FF;">,</span><span style="color: #000000;">0</span><span style="color: #0000FF;">}</span> <span style="color: #008080;">for</span> <span style="color: #000000;">i</span><span style="color: #0000FF;">=-</span><span style="color: #000000;">hh</span> <span style="color: #008080;">to</span> <span style="color: #0000FF;">+</span><span style="color: #000000;">hh</span> <span style="color: #008080;">do</span> <span style="color: #008080;">for</span> <span style="color: #000000;">j</span><span style="color: #0000FF;">=-</span><span style="color: #000000;">hw</span> <span style="color: #008080;">to</span> <span style="color: #0000FF;">+</span><span style="color: #000000;">hw</span> <span style="color: #008080;">do</span> <span style="color: #000000;">newrgb</span> <span style="color: #0000FF;">=</span> <span style="color: #7060A8;">sq_add</span><span style="color: #0000FF;">(</span><span style="color: #000000;">newrgb</span><span style="color: #0000FF;">,</span><span style="color: #7060A8;">sq_mul</span><span style="color: #0000FF;">(</span><span style="color: #000000;">C_E_D</span><span style="color: #0000FF;">[</span><span style="color: #000000;">i</span><span style="color: #0000FF;">+</span><span style="color: #000000;">hh</span><span style="color: #0000FF;">+</span><span style="color: #000000;">1</span><span style="color: #0000FF;">,</span><span style="color: #000000;">j</span><span style="color: #0000FF;">+</span><span style="color: #000000;">hw</span><span style="color: #0000FF;">+</span><span style="color: #000000;">1</span><span style="color: #0000FF;">],</span><span style="color: #000000;">original</span><span style="color: #0000FF;">[</span><span style="color: #000000;">y</span><span style="color: #0000FF;">+</span><span style="color: #000000;">i</span><span style="color: #0000FF;">,</span><span style="color: #000000;">x</span><span style="color: #0000FF;">+</span><span style="color: #000000;">j</span><span style="color: #0000FF;">]))</span> <span style="color: #008080;">end</span> <span style="color: #008080;">for</span> <span style="color: #008080;">end</span> <span style="color: #008080;">for</span> <span style="color: #000000;">new_image</span><span style="color: #0000FF;">[</span><span style="color: #000000;">y</span><span style="color: #0000FF;">,</span><span style="color: #000000;">x</span><span style="color: #0000FF;">]</span> <span style="color: #0000FF;">=</span> <span style="color: #7060A8;">sq_max</span><span style="color: #0000FF;">(</span><span style="color: #7060A8;">sq_min</span><span style="color: #0000FF;">(</span><span style="color: #7060A8;">sq_floor_div</span><span style="color: #0000FF;">(</span><span style="color: #000000;">newrgb</span><span style="color: #0000FF;">,</span><span style="color: #000000;">divisor</span><span style="color: #0000FF;">),</span><span style="color: #000000;">255</span><span style="color: #0000FF;">),</span><span style="color: #000000;">0</span><span style="color: #0000FF;">)</span> <span style="color: #008080;">end</span> <span style="color: #008080;">for</span> <span style="color: #008080;">end</span> <span style="color: #008080;">for</span> <span style="color: #000000;">new_image</span> <span style="color: #0000FF;">=</span> <span style="color: #7060A8;">flatten</span><span style="color: #0000FF;">(</span><span style="color: #000000;">new_image</span><span style="color: #0000FF;">)</span> <span style="color: #000080;font-style:italic;">-- (as needed by IupImageRGB)</span> <span style="color: #004080;">Ihandle</span> <span style="color: #000000;">new_img</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">IupImageRGB</span><span style="color: #0000FF;">(</span><span style="color: #000000;">width</span><span style="color: #0000FF;">,</span> <span style="color: #000000;">height</span><span style="color: #0000FF;">,</span> <span style="color: #000000;">new_image</span><span style="color: #0000FF;">)</span> <span style="color: #008080;">return</span> <span style="color: #000000;">new_img</span> <span style="color: #008080;">end</span> <span style="color: #008080;">function</span> <span style="color: #7060A8;">IupOpen</span><span style="color: #0000FF;">()</span> <span style="color: #000000;">imImage</span> <span style="color: #000000;">im1</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">imFileImageLoadBitmap</span><span style="color: #0000FF;">(</span><span style="color: #000000;">IMGFILE</span><span style="color: #0000FF;">)</span> <span style="color: #7060A8;">assert</span><span style="color: #0000FF;">(</span><span style="color: #000000;">im1</span><span style="color: #0000FF;">!=</span><span style="color: #004600;">NULL</span><span style="color: #0000FF;">,</span><span style="color: #008000;">"error opening "</span><span style="color: #0000FF;">&</span><span style="color: #000000;">IMGFILE</span><span style="color: #0000FF;">)</span> <span style="color: #004080;">Ihandle</span> <span style="color: #000000;">label1</span> <span style="color: #0000FF;">=</span> <span style="color: #7060A8;">IupLabel</span><span style="color: #0000FF;">(),</span> <span style="color: #000000;">label2</span> <span style="color: #0000FF;">=</span> <span style="color: #7060A8;">IupLabel</span><span style="color: #0000FF;">()</span> <span style="color: #7060A8;">IupSetAttributeHandle</span><span style="color: #0000FF;">(</span><span style="color: #000000;">label1</span><span style="color: #0000FF;">,</span> <span style="color: #008000;">"IMAGE"</span><span style="color: #0000FF;">,</span> <span style="color: #000000;">IupImageFromImImage</span><span style="color: #0000FF;">(</span><span style="color: #000000;">im1</span><span style="color: #0000FF;">))</span> <span style="color: #7060A8;">IupSetAttributeHandle</span><span style="color: #0000FF;">(</span><span style="color: #000000;">label2</span><span style="color: #0000FF;">,</span> <span style="color: #008000;">"IMAGE"</span><span style="color: #0000FF;">,</span> <span style="color: #000000;">detect_edges</span><span style="color: #0000FF;">(</span><span style="color: #000000;">im1</span><span style="color: #0000FF;">))</span> <span style="color: #004080;">Ihandle</span> <span style="color: #000000;">dlg</span> <span style="color: #0000FF;">=</span> <span style="color: #7060A8;">IupDialog</span><span style="color: #0000FF;">(</span><span style="color: #7060A8;">IupHbox</span><span style="color: #0000FF;">({</span><span style="color: #000000;">label1</span><span style="color: #0000FF;">,</span> <span style="color: #000000;">label2</span><span style="color: #0000FF;">}),</span><span style="color: #008000;">`TITLE="%s"`</span><span style="color: #0000FF;">,{</span><span style="color: #000000;">TITLE</span><span style="color: #0000FF;">})</span> <span style="color: #7060A8;">IupShow</span><span style="color: #0000FF;">(</span><span style="color: #000000;">dlg</span><span style="color: #0000FF;">)</span> <span style="color: #7060A8;">IupMainLoop</span><span style="color: #0000FF;">()</span> <span style="color: #7060A8;">IupClose</span><span style="color: #0000FF;">()</span> <!--</lang>--> =={{header\|Python}}==