Detailed explanation of the resolution of the hott

Detailed explanation of scanner resolution

6. Image resolution

image resolution refers to the total amount of information of digital images expressed in pixels, such as (pixel). No matter what medium is used, image resolution is very important when determining whether an image contains the amount of information required for high-quality output. High resolution images contain more pixels than low resolution images with the same print size, so the pixels are smaller. For example, a 1-inch X1 inch image with a 72dpi resolution contains a total of 5184 pixels; Similarly, how does the low-temperature tank operate when it is 1 inch by 1 inch? An image with a resolution of 300dpi contains a total of 90000 pixels

because higher resolution images use more pixels to represent each unit area, they usually reproduce finer color transitions than low resolution images when printing. However, for images scanned or created at a lower resolution, increasing the resolution can only expand the original pixel information to a larger number of pixels, without improving the quality of the image

to determine the image resolution used, the media for the final release of the image should be considered. If the produced image is used for page display, the image resolution only needs to meet the typical display resolution (72dpi or 96dpi). However, if used for printout, Use too low "if the express bag and adhesive tape are made of biodegradable plastic, the resolution will lead to poor definition and rough display results. Use too high resolution (smaller than the pixels that the output device can produce) It will make the image file larger and reduce the printing speed of the image

because there are so many resolution types, you may wonder which type is the most important and which needs to be controlled. It can be said that in order to ensure the quality of images from input to output from beginning to end, if you plan to output images to slides, multimedia video devices, etc., you only need to coordinate two types of resolutions, namely, input resolution and display resolution; If you want to output to the printer (or printing), you need to control four types of resolution

input resolution - enough information should be ensured to enter the digitized image to meet the final requirements

image resolution - in order to get good output, it should be checked that image 1 is to strengthen standards and regulations, and the information contained in the work should not be too little or too much

output resolution - ensure that the information density can meet the requirements of linear density or printer resolution

printer resolution - the highest resolution of the printer should be known

(to be continued)

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