More efficient at<T>() and set<T>()?

[rainyl]

Discussed in #44

^{Originally posted by msmartin4470 May 8, 2024}
What is the best way to loop though a Mat in dart? In C I did this using pointers as follows. Thanks in advance.

for (int i = 0; i < mat.rows; i++)
{
	uint16_t* matRow = mat.ptr<uint16_t>(i);
	for (int j = 0; j < mat.cols; j++)
	{
		uint16_t value = matRow[j];
		matRow[j] = lut.at<uint16_t>(value);
	}
}

```</div>

[rainyl]

Releated:

• Most efficient way to loop through a Mat #44 (reply in thread)

[rainyl]

Confirmed, current at() and set() is very slow, explicitly povide type like at<cv.U8> or atU8 will improve the performance significantly.