Beginners in Photoshop: Learning about resolution

It is important for users to understand how to measure and display pixel data for images when creating high-quality image works, because they determine the quality of the final output. In many PS professional books also on the resolution of the gratitude for accurate analysis, but most of them are jerky gratitude, for many beginners PS friends, very difficult to understand. Here the author will use the more popular way to tell, hope for beginners PS friend can help.

Below please download the practice file and start with me on the resolution of learning.

If you want to generalize in one sentence: the resolution is the number of pixels contained within the unit area.

1. Pixel

Bitmap images in a computer are made up of pixels.

(1) in Photoshop, execute the "file" → "open" command, the material "illustration. jpg" File open.

(2) using the Zoom tool to enlarge the file to 1200% this time you can see the image appears in a mosaic-like color block, each color block is a pixel point. A bitmap image is made up of pixel points. (Vector image is another thing, do not understand the classmate we will discuss next time.) )

Since the bitmap image is made up of pixels, the more pixels there are in the image, the clearer the details of the image and the more gorgeous the color.

(1) Execute "file" → "open" command, the material "people 1.jpg" file and "people 2.jpg" file open, the two images are the same size, but the number of pixels is different.

Note: The diagram here is not under the same scaling ratio.

(2) The image amplification pull, out of the unit area of the ruler, observe the image, you can find less pixels of the image is more blurred, and more pixels more clear image.

At this point some students asked, if the image of the pixel increase, will enlarge the picture, the picture quality will not improve?

The answer must be no, it will not improve the quality of the picture.

(3) Confirm that the "character 2.jpg" document is active, then open the Image Size dialog box, in the dialog box in the "character 2.jpg" image of the pixel value set with the "People 1.jpg" document the same, we compare two images can be seen, in 100% proportions of the state, the image details become blurred , so only the pixel of the image is enlarged and the image quality is not improved.

[1] [2] Next page