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Add javadoc for SSIM helper.

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PiperOrigin-RevId: 439332549
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claincly 2022-04-04 17:16:11 +01:00 committed by Ian Baker
parent 8138a9f48f
commit 5b258ef8ab
1 changed files with 11 additions and 0 deletions
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11
libraries/transformer/src/androidTest/java/androidx/media3/transformer/SsimHelper.java
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@ -330,6 +330,17 @@ public final class SsimHelper {
private static final double C2 = pow(IMAGE_DYNAMIC_RANGE * K2, 2);
private static final int WINDOW_SIZE = 8;
/**
* Calculates the Structural Similarity Index (SSIM) between two images.
*
* @param expected The luminance channel (Y) bitmap of the expected image.
* @param actual The luminance channel (Y) bitmap of the actual image.
* @param offset The offset.
* @param stride The stride of the bitmap.
* @param width The image width in pixels.
* @param height The image height in pixels.
* @return The SSIM score between the input images.
*/
public static double calculate(
int[] expected, int[] actual, int offset, int stride, int width, int height) {
double totalSsim = 0;