fix img_size type #2544

Job	Run time
Run tests on ubuntu-latest with Python 3.10	1m 48s
Run tests on ubuntu-latest with Python 3.10	1h 2m 20s
Run tests on ubuntu-latest with Python 3.10	1h 29m 35s
Run tests on ubuntu-latest with Python 3.10	32m 18s
Run tests on ubuntu-latest with Python 3.10	35m 18s
Run tests on ubuntu-latest with Python 3.10	42m 47s
Run tests on ubuntu-latest with Python 3.10	34m 53s
Run tests on ubuntu-latest with Python 3.10	2m 49s
Run tests on ubuntu-latest with Python 3.10	43m 44s
Run tests on ubuntu-latest with Python 3.10	1h 7m 29s
Run tests on ubuntu-latest with Python 3.10	30m 45s
Run tests on ubuntu-latest with Python 3.10	30m 42s
Run tests on ubuntu-latest with Python 3.10	38m 38s
Run tests on ubuntu-latest with Python 3.10	31m 27s
Run tests on ubuntu-latest with Python 3.12	2m 41s
Run tests on ubuntu-latest with Python 3.12	45m 8s
Run tests on ubuntu-latest with Python 3.12	1h 8m 21s
Run tests on ubuntu-latest with Python 3.12	30m 31s
Run tests on ubuntu-latest with Python 3.12	32m 26s
Run tests on ubuntu-latest with Python 3.12	39m 43s
Run tests on ubuntu-latest with Python 3.12	32m 41s
	13h 16m 4s

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