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ee.Image.lt
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如果 image1 和 image2 中每个匹配的波段对的第一个值都小于第二个值，则返回 1。如果 image1 或 image2 只有一个波段，则会将其与另一张图片中的所有波段进行比较。如果图片具有相同数量的波段，但名称不同，则会按自然顺序成对使用。输出波段的命名方式为：如果两个输入的长度不同，则以较长的输入命名；如果长度相同，则以 image1 的顺序命名。输出像素的类型为布尔值。
| 参数 | 类型 | 详细信息 |
|---|
此：image1 | 图片 | 从中获取左操作数波段的映像。 |
image2 | 图片 | 从中获取右操作数波段的映像。 |
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最后更新时间 (UTC)：2025-07-26。
[null,null,["最后更新时间 (UTC)：2025-07-26。"],[[["\u003cp\u003eThis function returns 1 if the first image's band values are less than the second image's corresponding band values, otherwise it returns 0.\u003c/p\u003e\n"],["\u003cp\u003eIt handles single-band and multi-band images, performing comparisons either across all bands or pairwise between corresponding bands.\u003c/p\u003e\n"],["\u003cp\u003eOutput image bands are named based on the input images' band names and quantities, using the longer list or the first image's if equal in length.\u003c/p\u003e\n"],["\u003cp\u003eThe resulting image contains boolean pixel values (1 or 0) indicating the comparison results.\u003c/p\u003e\n"]]],["The `lt` operation compares two images (`image1` and `image2`) band by band, returning `1` if `image1`'s value is less than `image2`'s, and `0` otherwise. If one image has a single band, it's compared against all bands of the other. Bands are matched pairwise, either by name or in natural order if names differ. Output bands inherit names from the longer image or `image1` if lengths are equal. The output image consists of boolean pixel values.\n"],null,["# ee.Image.lt\n\nReturns 1 if and only if the first value is less than the second for each matched pair of bands in image1 and image2. If either image1 or image2 has only 1 band, then it is used against all the bands in the other image. If the images have the same number of bands, but not the same names, they're used pairwise in the natural order. The output bands are named for the longer of the two inputs, or if they're equal in length, in image1's order. The type of the output pixels is boolean.\n\n\u003cbr /\u003e\n\n| Usage | Returns |\n|--------------------|---------|\n| Image.lt`(image2)` | Image |\n\n| Argument | Type | Details |\n|----------------|-------|---------------------------------------------------------|\n| this: `image1` | Image | The image from which the left operand bands are taken. |\n| `image2` | Image | The image from which the right operand bands are taken. |"]]
