We always encounter various nouns about pictures in our lives, such as image resolution, pixel, aspect ratio, so what do these words mean, and which dimension should we modify when modifying the size of the picture? size? How to choose the appropriate picture size before modifying the picture size? How to modify the image size online ?
What is the difference between image pixels, resolution and aspect ratio?
Image pixels refer to the small squares that make up the picture. Each square has a clear position and assigned color. This small square is a pixel. A pixel can be regarded as a picture that cannot be divided into smaller units. It is represented by "px". Each picture contains a certain number of pixels, which determine the size of the picture. The more pixels, the clearer the picture. , the better the quality of the printed picture, the more space the picture takes up.
Image resolution is generally used in ps to change the clarity of the image. Image resolution refers to the amount of information stored in the image, which is how many pixels are in the image per inch. The unit of resolution is PPI (Pixels Per Inch), usually called pixels per inch. The higher the image resolution, the more pixels it contains, the clearer the image, the better the printing quality, the better the color on the screen, and it will also increase the storage space occupied by the file.
The image aspect ratio refers to the ratio between the width and height of the video image. The calculation formula is that the aspect ratio is equal to the height of the crown divided by the average diameter multiplied by 100%. The aspect ratio of traditional film and television is 4:3, and that of wide-screen movies The aspect ratio is 1.85:1, high-definition television is 16:9, and panorama format movies are 2.35:1, so methods of changing the aspect ratio include masking screens and overlapping images.
How to choose the right image size?
We can see a variety of picture sizes in our lives, such as 4:3, 16:9 or 1:1, and the most used is 4:3, which is also the most traditional photo size, and many mobile phones have the default size, because The proportion of characters and scenery in this size is relatively harmonious, which is in line with the normal perspective to see people and scenery.
The second is 16:9. This size will make the photo longer and more suitable for horizontal composition, such as shooting outdoor scenery. In order to highlight the wide and vast feeling, this size is better.
The third type is 1:1, which is more literary and artistic. This size is more suitable for mobile Internet reading, because when many platforms post multiple pictures, the preview effect is square, such as Weibo, Moments, etc. You don’t need to click to open it. You can see all the content, the main body of the picture is more prominent, and the picture is more concise, which is liked by many young people.
How to modify the image size online?
So how do we adjust the image size online? You only need to open the universal picture editor - the magic tool for changing pictures, which supports uploading picture files in various formats for online editing. After uploading the picture, you can edit the picture size online.
Click "Modify Size" to modify the size of the image resolution, the unit is pixel, the larger the image size, the clearer the image quality, and the larger the storage space occupied.
Click "Crop Size" to modify the aspect ratio of the picture. In addition to providing the commonly used aspect ratios of 4:3, 16:9, and 1:1, the image changer can also crop the picture to 2:3 or even You can also freely crop the image or specify the width and height to enter the size of the image you want to crop.
