大约有 8,000 项符合查询结果（耗时：0.0282秒） [XML]
Programmatically create a UIView with color gradient
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Try This it worked like a charm for me,
Objective C
I have set RGB gradient background Color to UIview
UIView *view = [[UIView alloc] initWithFrame:CGRectMake(0,0,320,35)];
CAGradientLayer *gradient = [CAGradientLayer layer];
gradient.frame = view.bounds;
gradient.startPoint...
How to draw polygons on an HTML5 canvas?
...beginPath();
polygon(context,125,125,100,5,-Math.PI/2);
context.fillStyle="rgba(227,11,93,0.75)";
context.fill();
context.stroke();
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How can I measure the similarity between two images? [closed]
...al number of sections (say a 10x10 grid) and then computing a histogram of RGB values inside of each cell and compare corresponding histograms. This type of algorithm is preferred because of both its simplicity and it's invariance to scaling and (small!) translation.
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Set transparent background using ImageMagick and commandline prompt
...tched to PNG it did exactly what I wanted - just had to change "white" to "rgb($r,$g,$b)".
– Roger Dueck
Feb 9 '16 at 22:41
3
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使用 XML 和 Web 服务 · App Inventor 2 中文网
...ht: 150, colorDark: '#000000', //二维码颜色 colorLight: "#ffffff" //背景颜色}); App Inventor 2 中文网 © 2023 - document.write(new Date().getFullYear()); 跟着学（上海）教育科技有限公司 版权所有，未经书面许可，不得转载...
Add Text on Image using PIL
...hapes and text.
from PIL import Image, ImageDraw
blank_image = Image.new('RGBA', (400, 300), 'white')
img_draw = ImageDraw.Draw(blank_image)
img_draw.rectangle((70, 50, 270, 200), outline='red', fill='blue')
img_draw.text((70, 250), 'Hello World', fill='green')
blank_image.save('drawn_image.jpg')
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pdftk compression option
... ./base/gsicc_manage.c:1050: gsicc_open_search(): Could not find default_rgb.ic
| ./base/gsicc_manage.c:1651: gsicc_set_device_profile(): cannot find device profile
74.8MB-->32.2MB
badly pixellated
bookmarks TOC are gone
qpdf --linearize:
very fast, a few seconds
no size change
bookmark...
Achieving bright, vivid colors for an iOS 7 translucent UINavigationBar
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Instead of creating your UIColor object in the RGB format, use HSB and increase the saturation parameter. (Credits to Sam Soffes who describes this method here)
navigationBar.barTintColor = [UIColor colorWithHue:0.555f saturation:1.f brightness:0.855f alpha:1.f];
Note:...
I do not want to inherit the child opacity from the parent in CSS
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Instead of using opacity, set a background-color with rgba, where 'a' is the level of transparency.
So instead of:
background-color: rgb(0,0,255); opacity: 0.5;
use
background-color: rgba(0,0,255,0.5);
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Convert PDF to image with high resolution
...1.702 Bytes (1.85 MByte).
Its resolution is 3060x3960 pixels, using 16-bit RGB color space.
The better, sharp image on the left has a file size of 337.879 Bytes (330 kByte).
Its resolution is 758x996 pixels, using 8-bit Gray color space.
So, no need to resize; add the -density flag. The density va...