JPEG (Nhom Chuyen gia Anh Chup Lien hop)
JPEG la dinh dang hinh anh duoc su dung rong rai nhat cho anh chup va hinh anh phuc tap. No su dung nen mat du lieu de dat duoc kich thuoc tep nho trong khi van duy tri chat luong hinh anh chap nhan duoc. JPEG ho tro mau 24-bit (16,7 trieu mau) va duoc ho tro toan cau tren tat ca cac trinh duyet va thiet bi.
Loại MIME
image/jpeg
Loại
Nhị phân
Nén
Có mất dữ liệu
Ưu điểm
- + Excellent compression for photographs
- + Universal browser and device support
- + Adjustable quality/size trade-off
- + Small file sizes for web delivery
Nhược điểm
- − Lossy compression degrades quality on re-saves
- − No transparency support
- − Not suitable for text, line art, or sharp edges
Khi nào nên dùng .JPG
Su dung JPEG cho anh chup, hinh anh phuc tap co chuyen mau, va bat ky truong hop nao ma kich thuoc tep nho quan trong hon chat luong hoan hao tung diem anh.
Chi tiết kỹ thuật
JPEG su dung nen dua tren bien doi cosine roi rac (DCT). Chat luong co the duoc dieu chinh tu 1-100, voi gia tri cao hon giu duoc nhieu chi tiet hon nhung kich thuoc tep lon hon.
Lịch sử
JPEG duoc phat trien boi Nhom Chuyen gia Anh Chup Lien hop va duoc cong bo theo tieu chuan ISO 10918-1 vao nam 1992. No tro thanh dinh dang anh chup thong tri tren web vao giua nhung nam 1990.
Chuyển đổi từ .JPG
Chuyển đổi sang .JPG
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