{"id":20456,"date":"2020-06-01T21:59:53","date_gmt":"2020-06-02T01:59:53","guid":{"rendered":"https:\/\/sensing.konicaminolta.us\/blog\/conceptos-basicos-de-colorimetria\/"},"modified":"2020-06-02T11:27:50","modified_gmt":"2020-06-02T15:27:50","slug":"conceptos-basicos-de-colorimetria","status":"publish","type":"blog","link":"https:\/\/sensing.konicaminolta.us\/br\/blog\/conceptos-basicos-de-colorimetria\/","title":{"rendered":"Conceitos B\u00e1sicos de Colorimetria"},"content":{"rendered":"<p>A cor tem uma grande import\u00e2ncia em nossas vidas: n\u00e3o s\u00f3 influencia nossa prefer\u00eancia por alimentos, roupas e outros produtos, mas tamb\u00e9m pode indicar o estado de sa\u00fade de uma pessoa. Embora a cor nos rodeie constantemente, nosso conhecimento \u00e9 limitado. Ent\u00e3o, o que \u00e9 cor?<\/p>\n<p>A cor \u00e9 uma quest\u00e3o de percep\u00e7\u00e3o e interpreta\u00e7\u00e3o subjetiva. V\u00e1rias pessoas observando o mesmo objeto obter\u00e3o diferentes refer\u00eancias e experi\u00eancias e expressar\u00e3o a cor de uma maneira diferente e subjetiva.<\/p>\n<table style=\"margin-top: 100px;\">\n<tbody>\n<tr>\n<td style=\"padding-right: 20px; border-right: 1px solid #c0c0c0;\">Sin Luz no hay color.<\/p>\n<p><img decoding=\"async\" src=\"\/wp-content\/uploads\/picture1-3.png\" alt=\"sin luz no hay color\" \/><\/td>\n<td style=\"padding-left: 20px;\">Luz, visi\u00f3n y objecto son necesarios para percibir el color.<\/p>\n<p><img decoding=\"async\" src=\"\/wp-content\/uploads\/picture2.png\" alt=\"sin luz no hay color\" \/><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p><strong>Atributos da cor:<\/strong><\/p>\n<ul>\n<li>Tonalidade: \u00e9 o termo usado para a identifica\u00e7\u00e3o prim\u00e1ria das cores (por exemplo, vermelho, amarelo, verde etc.)<\/li>\n<li>Luminosidade: refere-se \u00e0 qu\u00e3o clara ou escura uma cor \u00e9 em rela\u00e7\u00e3o \u00e0 sua luminosidade.<\/li>\n<li>Cromaticidade: indica se as cores s\u00e3o mais ou menos saturadas.<\/li>\n<\/ul>\n<p>Quando falamos sobre apar\u00eancia, nos referimos aos atributos da cor (Tonalidade, satura\u00e7\u00e3o e luminosidade) e outros atributos f\u00edsicos da apar\u00eancia como brilho e textura. Ao criar escalas para tonalidade, cromaticidade e luminosidade, podemos medir as cores numericamente. Por outro lado, existem v\u00e1rias condi\u00e7\u00f5es que afetam a apar\u00eancia da cor, como:<\/p>\n<ul>\n<li>Diferentes fontes de ilumina\u00e7\u00e3o: luz solar, fluorescente e incandescente.<\/li>\n<li>Diferen\u00e7a de fundo: A cor \u00e9 mais escura em um fundo claro que em um fundo escuro.<\/li>\n<li>Diferen\u00e7as direcionais: de acordo com o \u00e2ngulo de observa\u00e7\u00e3o de um objeto.<\/li>\n<li>Diferen\u00e7as do observador: diferente sensibilidade visual das pessoas<\/li>\n<li>Diferen\u00e7as de tamanho: as cores aparecem mais brilhantes em \u00e1reas maiores.<\/li>\n<li>Mem\u00f3ria: afeta como as cores s\u00e3o lembradas.<\/li>\n<\/ul>\n<p>O brilho, por outro lado, \u00e9 uma propriedade superficial pr\u00f3xima \u00e0 reflet\u00e2ncia especular que \u00e9 respons\u00e1vel pela apar\u00eancia de espelho do objeto.<\/p>\n<p>A toler\u00e2ncia de cor representa uma diferen\u00e7a visual aceit\u00e1vel pelo consumidor e \u00e9 definida para um determinado Espa\u00e7o de cor, Iluminante e Observador.<\/p>\n<p>Apesar de todas as tentativas e experi\u00eancias di\u00e1rias com a cor, n\u00e3o existe uma escala f\u00edsica para medir as cores, dificultando assim suas diferencia\u00e7\u00f5es. Ao longo da hist\u00f3ria, v\u00e1rios m\u00e9todos foram criados para avaliar as cores numericamente. A CIE &#8211; Comiss\u00e3o Internacional de Iluminantes, criou um dos m\u00e9todos mais utilizados no mundo.<\/p>\n<p>O espa\u00e7o de cores L * a * b *, criado em 1976, para fornecer diferen\u00e7as de cores mais uniformes em rela\u00e7\u00e3o \u00e0s avalia\u00e7\u00f5es visuais.<\/p>\n<p><img decoding=\"async\" src=\"\/wp-content\/uploads\/picture3.png\" alt=\"Lab 1\" \/><\/p>\n<p>Os color\u00edmetros e espectrofot\u00f4metros s\u00e3o instrumentos para a medi\u00e7\u00e3o precisa das varia\u00e7\u00f5es das cores.<\/p>\n<p><a href=\"https:\/\/sensing.konicaminolta.us\/br\/technologies\/chroma-meters-colorimeters\/\"><strong>Color\u00edmetros<\/strong><\/a><\/p>\n<p>Os color\u00edmetros s\u00e3o instrumentos para o controle da cor que realizam medi\u00e7\u00f5es atrav\u00e9s de um sensor \u201ctrist\u00edmulus\u201d, baseado nas cores prim\u00e1rias percebidas pelo olho humano, vermelho, verde e azul. As medi\u00e7\u00f5es de cores com sensores trist\u00edmulus fornecem a quantidade desses tr\u00eas componentes presentes na luz refletida ou transmitida por um objeto. Esses dados podem ser utilizados para analisar os atributos da cor.<\/p>\n<p><a href=\"https:\/\/sensing.konicaminolta.us\/br\/applications\/color-measurement\/\"><strong>Espectrofot\u00f4metros<\/strong><\/a><\/p>\n<p>Os espectrofot\u00f4metros s\u00e3o os instrumentos mais sofisticados e precisos para o controle de qualidade e formula\u00e7\u00e3o de receitas de cores. Os espectrofot\u00f4metros realizam medi\u00e7\u00f5es de cor com sensores espectrais que medem a reflet\u00e2ncia ou transmit\u00e2ncia espectral de um objeto em todo o espectro vis\u00edvel, em comprimentos de onda entre 400 a 600 nm.<\/p>\n<p>A Konica Minolta Sensing fornece uma grande variedade de instrumentos e softwares para a medi\u00e7\u00e3o de cor, como o espectrofot\u00f4metro de bancada <a href=\"https:\/\/sensing.konicaminolta.us\/br\/products\/espectrofotometro-cm-5\/\">CM-5<\/a>, projetado para avaliar a cor de amostras opacas, transl\u00facidas e transparentes nas mais variadas aplica\u00e7\u00f5es e o color\u00edmetro <a href=\"https:\/\/sensing.konicaminolta.us\/br\/products\/colorimetro-cr-400\/\">CR-400<\/a>, projetado para avaliar a cor de objetos com superf\u00edcies lisas e uniformes.<\/p>\n","protected":false},"featured_media":12646,"template":"","learning_center_categories":[1775],"class_list":["post-20456","blog","type-blog","status-publish","has-post-thumbnail","hentry","learning_center_categories-color-appearance-measurement-br"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v24.4 (Yoast SEO v24.4) - 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