本文提供一些调整图片大小、裁剪和对齐图片的用例。
调整图片大小
我们利用 URL 的查询字符串来调整图片大小。
指定宽度和保留比率
1
指定高度和保留比率
1
指定宽度和高度
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它不仅可以用于页面资源,而且也适用于 static 图像和外部图像。 但是,除了页面资源外,其他资源的大小都是按内联样式调整的,也就是说,它们的原始大小不会改变。
对齐图像
我们可以利用 URL 片段轻易地对齐图像,比如:#center
, #float-start
和 #float-end
分别表示居中对齐、向左浮动和向右浮动。
居中对齐
添加 #center
使图片居中对齐。
举个例子:
。
向左浮动
添加 #float-start
使图片向左浮动。
举个例子:
。
向右浮动
同样的,我们也可以添加 #float-end
使图片向右浮动。
举个例子:
。
Caption
HBS 允许使用图片标题作为 caption,但这个功能默认是关闭的,你需要启用 post.imageTitleAsCaption
参数:
params.toml
1[post]
2 imageTitleAsCaption = true
params.yaml
1post:
2 imageTitleAsCaption: true
params.json
1{
2 "post": {
3 "imageTitleAsCaption": true
4 }
5}
1
Crop Images
Crop an image to match the given dimensions without resizing. You must provide both width and height. Use the anchor1 option to change the crop box anchor point.
1
- The size
[width]x[height]
is required. [anchor]
is optional, the,
is used to separate the size and anchor.
Examples | ||
---|---|---|
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![]() | ![]() | ![]() |
Fill Images
Crop and resize an image to match the given dimensions. You must provide both width and height. Use the anchor1 option to change the crop box anchor point.
1
- The size
[width]x[height]
is required. [anchor]
is optional, the,
is used to separate the size and anchor.
Examples | ||
---|---|---|
![]() | ![]() | ![]() |
![]() | ![]() | ![]() |
![]() | ![]() | ![]() |
Fit Images
Downscale an image to fit the given dimensions while maintaining aspect ratio. You must provide both width and height.
1
Filters
Brightness
The brightness
must be in range (-100, 100)
.
1
ColorBalance
ColorBalance creates a filter that changes the color balance of an image. The percentage parameters for each color channel (red, green, blue) must be in range (-100, 500)
.
1
Colorize
Colorize creates a filter that produces a colorized version of an image. The hue parameter is the angle on the color wheel, typically in range (0, 360)
. The saturation parameter must be in range (0, 100)
. The percentage parameter specifies the strength of the effect, it must be in range (0, 100)
.
1
Contrast
The contrast
must be in range (-100, 100)
.
1
Gamma
Gamma creates a filter that performs a gamma correction on an image. The gamma parameter must be positive. Gamma = 1 gives the original image. Gamma less than 1 darkens the image and gamma greater than 1 lightens it.
1
GaussianBlur
Applies a gaussian blur to an image.
1
Grayscale
Grayscale creates a filter that produces a grayscale version of an image.
1
Hue
Hue creates a filter that rotates the hue of an image. The hue angle shift is typically in range -180
to 180
.
1
Invert
Invert creates a filter that negates the colors of an image.
1
Pixelate
Pixelate creates a filter that applies a pixelation effect to an image.
1
Saturation
Saturation creates a filter that changes the saturation of an image.
1
Sepia
Sepia creates a filter that produces a sepia-toned version of an image.
1
Sigmoid
Sigmoid creates a filter that changes the contrast of an image using a sigmoidal function and returns the adjusted image. It’s a non-linear contrast change useful for photo adjustments as it preserves highlight and shadow detail.
1
UnsharpMask
UnsharpMask creates a filter that sharpens an image. The sigma parameter is used in a gaussian function and affects the radius of effect. Sigma must be positive. Sharpen radius roughly equals 3 * sigma. The amount parameter controls how much darker and how much lighter the edge borders become. Typically between 0.5
and 1.5
. The threshold parameter controls the minimum brightness change that will be sharpened. Typically between 0
and 0.05
.
1
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