heic image size reported wrongly

[grasdk]

Using an specific image with resolution 1600x3232 (definitely not square). image-size v1.1.1 reports the dimensions as 512x512.

Reproduce on WSL in Windows 10:

• Download the image provided by github user malavolti
• Install image-size global npm install image-size --global if you haven't already
• Run image-size 2024-01-28_13.43.14.heic

Result:

$ image-size 2024-01-28_13.43.14.heic
512x512 - 2024-01-28_13.43.14.heic (heic)

This is not unique to the command-line. When using image-size as a node library, the dimensions are also reported to be 512x512.

Here is a screenshot of the image in a tool that shows the dimensions of the image:

[netroy]

I'm not a heic/heif expert, so I don't know if this is an issue in the image or not. but the issue here seems to be that this image contains 2 ispe boxes, while this library assumes that there should only be one such box.

I'm guessing that heic allows storing multiple images, and in this case the first image is a square thumbnail, while the second image is the actual image.

[netroy]

According to this heic does indeed support multiple images. So to fix this issue, we need to figure out which image is the master/primary image, and return dimensions of that.