{"id":4829,"date":"2018-10-19T22:47:08","date_gmt":"2018-10-19T14:47:08","guid":{"rendered":"https:\/\/unitycoder.com\/blog\/?p=4829"},"modified":"2018-10-19T22:49:00","modified_gmt":"2018-10-19T14:49:00","slug":"hsv-debugging-shader","status":"publish","type":"post","link":"https:\/\/unitycoder.com\/blog\/2018\/10\/19\/hsv-debugging-shader\/","title":{"rendered":"HSV Debugging and Color Match Shader"},"content":{"rendered":"

Quick test for color matching using shader,
\nby converting colors into HSV and comparing target color with h-s-v threshold values.<\/p>\n

See Shader source at the bottom.<\/p>\n

\"\"
\n(main image: Changing target color, shows inverted color for the texture in that matching hue position)<\/p>\n

\n

Shader has different draw modes for debugging:<\/p>\n

\"\"<\/p>\n

for RemapHue, need to supply this texture in “HueGradientTexture” field
\n\"\"<\/p>\n

Here is my testing texture
\n\"\"<\/p>\n

\n

One question remains:<\/strong>
\nWhy do i need to invert targetHue for the hueDistance calculation? (otherwise it picks wrong hue..)
\nfloat hueDist = abs(sourceHSV.x – (1-targetHSV.x));<\/em><\/span><\/p>\n

\n

References:<\/strong>
\n– RGB to HSV http:\/\/lolengine.net\/blog\/2013\/07\/27\/rgb-to-hsv-in-glsl<\/a><\/p>\n

\n

Shader source:<\/strong>
\n– https:\/\/github.com\/UnityCommunity\/UnityLibrary\/blob\/master\/Assets\/Shaders\/2D\/Debug\/HSVDebugger.shader<\/a><\/p>\n

 <\/p>\n","protected":false},"excerpt":{"rendered":"

Quick test for color matching using shader, by converting colors into HSV and comparing target color with h-s-v threshold values. See Shader source at the bottom. (main image: Changing target color, shows inverted color for the texture in that matching hue position) Shader has different […]<\/p>\n","protected":false},"author":1,"featured_media":4830,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2},"jetpack_post_was_ever_published":false},"categories":[13,3],"tags":[79,389,738,1060,1061,575,14,1062],"class_list":["post-4829","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-shaders","category-unity3d","tag-color","tag-convert","tag-debug","tag-hsv","tag-match","tag-rgb","tag-shader","tag-similar"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"https:\/\/i0.wp.com\/unitycoder.com\/blog\/wp-content\/uploads\/2018\/10\/color-match-shader-preview.gif?fit=454%2C267&ssl=1","jetpack_shortlink":"https:\/\/wp.me\/p1KTaT-1fT","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/unitycoder.com\/blog\/wp-json\/wp\/v2\/posts\/4829","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/unitycoder.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/unitycoder.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/unitycoder.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/unitycoder.com\/blog\/wp-json\/wp\/v2\/comments?post=4829"}],"version-history":[{"count":3,"href":"https:\/\/unitycoder.com\/blog\/wp-json\/wp\/v2\/posts\/4829\/revisions"}],"predecessor-version":[{"id":4836,"href":"https:\/\/unitycoder.com\/blog\/wp-json\/wp\/v2\/posts\/4829\/revisions\/4836"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/unitycoder.com\/blog\/wp-json\/wp\/v2\/media\/4830"}],"wp:attachment":[{"href":"https:\/\/unitycoder.com\/blog\/wp-json\/wp\/v2\/media?parent=4829"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/unitycoder.com\/blog\/wp-json\/wp\/v2\/categories?post=4829"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/unitycoder.com\/blog\/wp-json\/wp\/v2\/tags?post=4829"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}