本文目录一览:
- 1、300DPI的图片是几乘几像素的阿? 有计算公式吗?
- 2、300dpi到底是多大尺寸
- 3、照片分辨率是300dpi是什么意思?那图片的大小究竟是多少呢?
- 4、300dip和500dip的照片像素分别是几乘几
300DPI的图片是几乘几像素的阿? 有计算公式吗?
DPI原是印刷上的计量单位,意指每平方英寸上所印刷的网点数(DotPerInch)。现在大多数人已将数码影像的解析度用DPI表示。但较为严谨的人可能不会同意,因为印刷时计算的网点大小(Dot)和电脑的显示像素(Pixel)并非相同,所以较专业的人士会用PPI(PixelPerInch)表示分辨率,用以区分二者。 1024像素=3.413英寸=8.67厘米(300像素/英寸dpi 每英寸≈0.003333像素)
我们通常说的300DPI是每英寸300像素的意思~~
300dpi到底是多大尺寸
300DPI就是说1平方英寸有300个点,数码激光冲印的分辨率一般都是300DPI。
举个例,假设拍摄的相片是150万像素(1024x1536),就把1024及1536各除以300,得出3.5寸x5寸(即3R尺寸)。即是说,150万像素的数码相片冲印的更大极限是3R,200万像素的数码相片冲印的更大极限是4R,以此类推。
照片分辨率是300dpi是什么意思?那图片的大小究竟是多少呢?
dpi是指单位面积内像素的多少,也就是扫描精度。
目前国际上都是计算一英寸面积内像素的多少。dpi越小,扫描的清晰度越低,由于受 *** 传输速度的影响,web上使用的图片都是72dpi,但是冲洗照片不能使用这个参数,必须是300dpi或者更高350dpi。例如要冲洗4*6英寸的照片,扫描精度必须是300,那么文件尺寸应该是(4*300)*(6*300)=1200像素*1800像素。
扩展资料:
DPI原来是印刷上的记量单位,意思是每英寸上,所能印刷的网点数(Dot Per Inch)。但随着数字输入,输出设备快速发展,大多数的人也将数字影像的解析度用DPI表示,但较为严谨的人可能注意到,印刷时计算的网点(Dot)和电脑显示器的显示像素(Pixel)并非相同,所以较专业的人士,会用PPI(Pixel Per Inch)表示数字影像的解析度,以区分二者。
我们通常讲的打印机分辨率是多少DPI,指的是"在该打印机更高分辨率模式下,每英寸所能打印的最多"理论"墨点数"。
参考链接:DPI-百度百科
300dip和500dip的照片像素分别是几乘几
DPI是指在单位面积内打印的点数,和像素没有直接的关系,想要计算必须得知道你要打印多大的尺寸,比如你要打印2*3英寸的图片,需要打印成300DPI的,那么像素就是(2×300)×(3×300)=600×900像素
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