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  • 如何保证印刷图片质量
  • 本站编辑:杭州诗欣纸制品印刷有限公司发布日期:2019-04-04 07:31 浏览次数:

印刷厂要想保证图片细节不受损失或很少损失,有以下几条注意事项:

1、首先,PS调整图片,印刷厂需要在TIFF格式下进行,要是在JPEG格式下,会随着调整步骤加多,细节损失越大。

如果是JPEG格式的图片,也要转换成TIFF格式再调整比较好。对于原始尺寸不大的图片,最好也要用插值把它变大再调整。因为JPEG是有损压缩格式,对片子中人眼不易察觉的部位悄悄做了“简化”,因此信息是不完全的,在这个不完全的基础上作调整,尤其是其中被删掉的某些不易察觉的部份,在PS运作中是起着作用的,没有就难免会使图像变得粗糙。

2、印刷厂在做图像的色调和反差的调整时,要想尽量保留图像的原有数据信息,就要注意尽量避免使用Photoshop 里的一些命令,主要是在“图像——调整——”分菜单内。

3、在调好图片以后,要缩小图像尺寸到600x400。

4、印刷厂对准备在网上贴的图片要注意转换色彩空间。

5、把图片存为JPEG格式:要避免细节损失,要使用“文件——另存为WEB所用格式——”

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n order to ensure that the details of the pictures are not lost or very little, the printers should pay attention to the following points:

1. First of all, PS adjusts pictures. Printers need to do it in TIFF format. If it is in JPEG format, the more adjusting steps, the greater the loss of details.

If it is in JPEG format, it is better to convert it into TIFF format and readjust it. For the original size of small pictures, it is better to use interpolation to make it larger and readjust. Because JPEG is a lossy compression format, it quietly simplifies the parts of the film that are not easily perceived by the human eye, so the information is incomplete. Adjustment based on this incomplete format, especially some parts which are not easily perceived, plays an important role in PS operation. Without JPEG, the image will inevitably become rough.

2. When adjusting the tone and contrast of the image, the printer should try to keep the original data information of the image as much as possible, and avoid using some commands in Photoshop, mainly in the sub-menu of "Image-Adjustment".

3. After adjusting the picture, the size of the image should be reduced to 600x400.

4. Printers should pay attention to changing the color space when preparing pictures to be posted on the Internet.

5. Store pictures in JPEG format: To avoid loss of detail, use "File-Save as WEB Format"