I need to resize the image about lodepng HOT 2 CLOSED

Out of curiosity, do you need to convert just one large PNG image, or do you need software to automatically do so repeatedly? If the latter, does your system have enough memory to load 4MB+ images? Are the images already square (same width and height)? If not, how do you propose to convert them to 100x100, by cropping or stretching?

I am not the author of lodepng, but I doubt it makes sense to add such functionality to lodepng directly because there are too many variations. The beauty of lodepng is its limited scope; it does a very simple thing and does it very well without overhead of feature bloat. However, it might make sense for someone to write a separate library to perform resizing that depends on lodepng.

from lodepng.

Hi,
Resizing an image is its own specialized topic, LodePNG is focused on decoding/encoding PNG images, while resizing is out of scope. For more information on image rescaling, see for example https://en.wikipedia.org/wiki/Image_scaling. A popular library from the top of my head that can do it is imagemagick, but many other libraries and implementations can be found online.
I hope that helps. Since rescaling is out of scope for this library I'll close this issue.

from lodepng.