For example, if you resize the height of a source image from 200 × 100 pixels to 100 pixels, the width of the source image is resized to 50 pixels. The source image is proportionally resized when proportional resizing is performed. Resize an image based on the specified width or height.If you use a URL to resize an image based on the specified height and width and proportion, the image is resized based on the specified height and width. The total pixel number of the resized image cannot exceed 16,777,216. The width or height of a resized image cannot exceed 16,384 pixels. The total pixel number of a static image, such as a PNG image, is calculated based on the following formula: Width × Height. The total pixel number of a dynamic image, such as a GIF image, is calculated based on the following formula: Width × Height × Number of image frames. The total number of pixels of the source image cannot exceed 250 million.
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