computer graphic lesson 4
TRANSCRIPT
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ຄວາມໝາຍຂອງ ສີ�
ສ�ໝາຍເຖິ&ງແສງທິ�.ມາກະທິ1ບກ�ບວັ�ດຖິ4 ແລ5ວັສະທິ5ອນໃສ.ຕາເຮົ1າເຮົ�ດໃຫ້5ເຫ້�ນເປັ�ນສ�ຕ.າງໆ
ຖ້�າໂລກສີ�ສີ�ນໃນໂລກນ��ມ�ແຕ່�ສີ�ຂາວ-ດຳ�າຈະເປັ�ນແນວໃດຳ?
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ທີ່��ມາຂອງສີ�ທີ່��ຢູ່"�ຮອບຕ່%ວເຮ%າ
ສ�ທິ�.ມ�ຢູ່<.ຮົອບຕ1ວັເຮົ1າມ�ທິ�.ມາ 3 ທິາງຄື?:
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ທີ່��ມາຂອງສີ�ທີ່��ຢູ່"�ຮອບຕ່%ວເຮ%າ
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ແສງ ເປັ�ນພັະລ�ງງານຊະນ&ດດຽວັທິ�.ໃຫ້5ສ�ໂດຍຢູ່<.ໃນຮົ<ບຂອງລ�ງສ� (Ray) ທິ�.ມ�ຄືວັາມເຂ�5ມຂອງແສງຢູ່<.ໃນຊ.ວັງທິ�.ສາຍຕາເບ&.ງເຫ້�ນ
ທີ່��ມາຂອງສີ�ທີ່��ຢູ່"�ຮອບຕ່%ວເຮ%າ
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ແມ�ສີ�ຂອງແສີງ(Spectrum Primaries)
ແມ.ນສ�ທິ�.ເກ�ດຂD5ນຈາກການປັະສ1ບກ�ນຂອງຄື?5ນແສງ ມ�ທິ�ງໝ1ດ 3 ສ�ຄື?:
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ການປັະສີ%ມສີ�ຂອງແມ�ສີ�ຂອງແສີງ
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RGB vs CMYK
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ສີ�ຮ�ອນ ແລະ ສີ�ເຢູ່�ນ
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ໝວດຳຂອງສີ�(Colour Mode)
ໝວັດຂອງສ�ໄດ5ແບ.ງອອກເປັ�ນ 4 ໝວັດດ5ວັຍກ�ນຄື?1. Hue
2. RGB
3. CMYK
4. LAB
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Hue(ຕ່າມຫຼັA�ກການເຫຼັ�ນສີ�ຂອງມະນBດຳ)ມ� 3 ລ�ກສີະນະຄD:
1. Hue ເປັ�ນສີ�ຂອງວ�ດຳຖ້Bທີ່��ສີະທີ່�ອນເຂ%�າຕ່າ2. Saturation ຄDສີ�ດຳສີ�ວນຂອງສີ�ເທີ່%າທີ່�ມ�ຢູ່"�ໃນສີ�
ນ��ນສີ�0% ແມ�ນມ�ສີ�ເທີ່%າປັະສີ%ມຢູ່"�ຫຼັAຍສີ� 100% ແມ�ນບ��ມ�ສີ�ເທີ່%າປັະສີ%ມຢູ່"�ເລ�ຍ
3. ເປັ�ນເລD�ອງຂອງຄວາມແຈ�ງ ແລະ ຄວາມມDດຳຂອງສີ�
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RGB Mode(ຕ່າມຫຼັA�ການສີະແດຳງສີ�ຂອງເຄD�ອງຄອມພິMວເຕ່�)
ເປັ�ນການສະແດງຜົ1ນຂອງສ� ເທິ&ງໜ້5າຈ�
ໝາຍເຫ້ດ ຈ4ດຂອງສ�ທິ�ງສາມຮົວັມກ�ນເອ�5ນວັ.າ Additive
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Lab Color Mode Lab ເປັ�ນຄື.າມ�.ກ�ານ1ດໂດຍ CIE(Commission
Internationale de l'Eclairage)ເປັ�ນສ�ມາດຕະຖິານກາງທິ�.ວັ�ດແທິກສ�ທິ4ກຮົ<ບແບບ ທິ�ງສ� RGB ແລະ CMYK
L ຄື.າວັ.າແຈ5ງA ສ.ວັນປັະກອບທິ�.ສະແດງການໄລ.ສ�ຈາກສ�ຂຽວັໄປັແດງB ສ.ວັນປັະກອບທິ�.ສະແດງການໄລ.ສ�ຈາກສ�ຟ້5າໄປັສ�ເຫ້[ອງ
ເພິ��ມເຕ່�ມ: LAB stands for Lightness, A Channel, B Channel
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Graphic ເທິ&ງສ?.ໂຄືສະນາ(ສ&.ງພັ&ມ)
ແຜົ.ນປັ5າຍໂຄືສະນາ(Poster) ແຜົ.ນພັ�ບ(Folders) ໃບປັ&ວັ(Leaflets) ບ�ດປັະເພັດຕ.າງໆ(Cards)
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ແຜົ.ນປັ5າຍໂຄືສະນາ ແຜົ.ນປັ5າຍໂຄືສະນາທິ�.ດ�ຕ5ອງປັະກອບໄດ5 3 ອ1ງປັະກອບດ�.ງນ�5:1. ຕ5ອງເປັ�ນແຜົ.ນດຽວັ2. ຕ5ອງມ�ຂ�5ຄືວັາມປັະກອບສະເໝ�3. ຕ5ອງຕ&ດໄວັ5ບ.ອນທິ�.ມ�ຄື1ນຜົ.ານຫ້[າຍ
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ສີM�ງທີ່��ບ��ຄວນເຮ�ດຳ
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ແຜົ.ນປັ5າຍໂຄືສະນາ(ຕ�.) ແຜົ.ນປັ5າຍໂຄືສະນາທິ�.ດ�ຄືວັນຕອບສະໜ້ອງແນວັຄືວັາມຄື&ດຫ້[�ກ 5 ປັະການຄື?:
1. ຕ5ອງຕອບສະໜ້ອງຈ4ດປັະສ1ງໃນການສ?.ຄືວັາມໝາຍໄດ5ຢູ່.າງເຕ�ມທິ�.
2. ຕ5ອງມ�ຄືວັາມຊ�ດເຈນໃນພັາບລວັມແລະ ຂ�5ຄືວັາມທິ�.ໃຊ5ໃນການສ?.ຄືວັາມໝາຍແລະ ມ�
ຂະໜ້າດທິ�.ເໝາະສ1ມ
3. ຮົ<ບພັາບແລະຂ�5ຄືວັາມທິ�.ນ�າສະເໜ້�ຄືວັນມ�ຄືວັາມສອດຄື.ອງ ແລະສ1.ງເສ�ມ
ເຊ&.ງກ�ນແລະກ�ນ
4. ຕ5ອງສາມາດເຮົ�ດເຮົ�ດໃຫ້5ກ4.ມເປັ15າໝາຍເຂ15າໃຈ ແລະ ດDງດ<ດຄືວັາມສ1ນໃຈໄດ5ດ�ທິ�.ສ4ດ
5. ຕ5ອງມ�ຄືວັາມກະທິ�ດຫ້�ດ ແລະ ກາຍເປັ�ນຈ4ດສ1ນໃຈ ແລະ ຈ4ດເດ�.ນທິ�.ຄືວັນຈ?.