如何将图像隐藏为印度护照尺寸图像 [英] how to covert image as Indian passport size image

问题描述

您好

我在c＃中创建应用程序。

我有picturebox1 我将Image1.jpg添加到图片框中

现在我想将Image1转换为印度护照尺寸图像（Image2.jpg）和

将其分配给picturebox2

现在我保存picturebox2（Image2.jpg） 进入sql server databae

请帮帮我

问候

Ramachandran

解决方案

嗨chandran，

我有一些代码你可以使用

它会调整您选择的图片大小，然后将其另存为gif或jpeg。这是一个使用System的ststic class

; 
使用System.Collections.Generic;使用System.Drawing 
; 
使用System.Drawing.Drawing2D; 
使用System.Drawing.Imaging; 
使用System.Linq; 
 //使用Encoder = System.Text.Encoder; 
 
 namespace Your_Namespace 
 {
 public static class ImageExtensionMethods 
 {
 
 static private ImageCodecInfo GetEncoder（ImageFormat format）
 {
返回ImageCodecInfo.GetImageDecoders（）。SingleOrDefault（c => c.FormatID == format.Guid）; 
} 
 
 public static void SaveAsJpeg（此Image Img，字符串FileName，Int64质量）
 {
 ImageCodecInfo jgpEncoder = GetEncoder（ImageFormat.Jpeg）; 
 Encoder QualityEncoder = Encoder.Quality; 
 
 using（EncoderParameters EP = new EncoderParameters（1））
 {
 using（EncoderParameter QualityEncoderParameter = new EncoderParameter（QualityEncoder，Quality））
 {
 EP.Param [0] = QualityEncoderParameter; 
 Img.Save（FileName，jgpEncoder，EP）; 
} 
} 
} 
 
 public static void SaveAsGif（此图片Img，字符串FileName，Int64质量）
 {
 ImageCodecInfo gifEncoder = GetEncoder（ImageFormat.Gif）; 
 Encoder QualityEncoder = Encoder.Quality; 
 
 using（EncoderParameters EP = new EncoderParameters（1））
 {
 using（EncoderParameter QualityEncoderParameter = new EncoderParameter（QualityEncoder，Quality））
 {
 EP.Param [0] = QualityEncoderParameter; 
 Img.Save（FileName，gifEncoder，EP）; 
} 
} 
} 
 
公共静态图像大小调整（此图像Img，int宽度，int高度，InterpolationMode InterpolationMode）
 {
 Image CropedImage =新位图（宽度，高度）; 
使用（Graphics G = Graphics.FromImage（CropedImage））
 {
 G.SmoothingMode = SmoothingMode.HighQuality; 
 G.InterpolationMode = InterpolationMode; 
 G.PixelOffsetMode = PixelOffsetMode.HighQuality; 
 G.DrawImage（Img，0,0，Width，Height）; 
} 
 
返回CropedImage; 
} 
 
公共静态图像大小调整（此图像Img，int宽度，int高度）
 {
返回Img.Resize（宽度，高度，InterpolationMode.HighQualityBicubic） ; 
} 
 
 private static Rectangle EnsureAspectRatio（此Image Image，int Width，int Height）
 {
 float AspectRatio = Width /（float）Height; 
 float CalculatedWidth = Image.Width，CalculatedHeight = Image.Height; 
 
 if（Image.Width> = Image.Height）
 {
 if（Width> Height）
 {
 CalculatedHeight = Image.Width / AspectRatio; 
 if（CalculatedHeight> Image.Height）
 {
 CalculatedHeight = Image.Height; 
 CalculatedWidth = CalculatedHeight * AspectRatio; 
} 
} 
其他
 {
 CalculatedWidth = Image.Height * AspectRatio; 
 if（CalculatedWidth> Image.Width）
 {
 CalculatedWidth = Image.Width; 
 CalculatedHeight = CalculatedWidth / AspectRatio; 
} 
} 
} 
其他
 {
 if（宽度<高度）
 {
 CalculatedHeight = Image.Width / AspectRatio; 
 if（CalculatedHeight> Image.Height）
 {
 CalculatedHeight = Image.Height; 
 CalculatedWidth = CalculatedHeight * AspectRatio; 
} 
} 
其他
 {
 CalculatedWidth = Image.Height * AspectRatio; 
 if（CalculatedWidth> Image.Width）
 {
 CalculatedWidth = Image.Width; 
 CalculatedHeight = CalculatedWidth / AspectRatio; 
} 
} 
} 
返回Rectangle.Ceiling（new RectangleF（（Image.Width  -  CalculatedWidth）/ 2,0，CalculatedWidth，CalculatedHeight））; 
} 
 
 public static Image ResizeToCanvas（this Image Img，int Width，int Height，out Rectangle CropRectangle）
 {
 return Img.ResizeToCanvas（Width，Height， InterpolationMode.HighQualityBicubic，out CropRectangle）; 
} 
 
 public static Image ResizeToCanvas（此Image Img，int Width，int Height，InterpolationMode InterpolationMode，out Rectangle CropRectangle）
 {
 CropRectangle = EnsureAspectRatio（Img，宽度，高度）; 
 Image CropedImage =新位图（宽度，高度）; 
 
使用（Graphics G = Graphics.FromImage（CropedImage））
 {
 G.SmoothingMode = SmoothingMode.HighQuality; 
 G.InterpolationMode = InterpolationMode; 
 G.PixelOffsetMode = PixelOffsetMode.HighQuality; 
 G.DrawImage（Img，new Rectangle（0,0，Width，Height），CropRectangle，GraphicsUnit.Pixel）; 
} 
 
返回CropedImage; 
} 
 
 public static Image ResizeToCanvas（此Image Img，int Width，int Height，RectangleF CR）
 {
 return Img.ResizeToCanvas（Width，Height，InterpolationMode） .HighQualityBicubic，CR）; 
} 
 
 public static Image ResizeToCanvas（此Image Img，int Width，int Height，InterpolationMode InterpolationMode，RectangleF CR）
 {
 Image CropedImage = new Bitmap（Width） ，身高）; 
使用（Graphics G = Graphics.FromImage（CropedImage））
 {
 G.SmoothingMode = SmoothingMode.HighQuality; 
 G.InterpolationMode = InterpolationMode; 
 G.PixelOffsetMode = PixelOffsetMode.HighQuality; 
 G.DrawImage（Img，new Rectangle（0,0，Width，Height），CR，GraphicsUnit.Pixel）; 
} 
 
返回CropedImage; 
} 
 
} 
 
} 
 

使用此选项可调整图像大小。

像这样使用它：

 Image img = ImageExtensionMethods.Resize（image，300， 100）; 
 
 ImageExtensionMethods.SaveAsGif（img，logoPath，65535）; 

Hi

I am creating application in c#.

I have picturebox1  and i add a Image1.jpg in to picture box

Now i want to convert that Image1 to Indian passport size image(Image2.jpg) and

assign it to picturebox2

Now I save the picturebox2 (Image2.jpg)  in to sql server databae

Please help me

Regards

Ramachandran

解决方案

Hi chandran,

I've have some code u can use

It resize a picture of you'r choice and then save it as gif or jpeg. It is a ststic class

using System;
using System.Collections.Generic;
using System.Drawing;
using System.Drawing.Drawing2D;
using System.Drawing.Imaging;
using System.Linq;
//using Encoder = System.Text.Encoder;

namespace Your_Namespace
{
    public static class ImageExtensionMethods
    {

        static private ImageCodecInfo GetEncoder(ImageFormat format)
        {
            return ImageCodecInfo.GetImageDecoders().SingleOrDefault(c => c.FormatID == format.Guid);
        }

        public static void SaveAsJpeg(this Image Img, string FileName, Int64 Quality)
        {
            ImageCodecInfo jgpEncoder = GetEncoder(ImageFormat.Jpeg);
            Encoder QualityEncoder = Encoder.Quality;

            using (EncoderParameters EP = new EncoderParameters(1))
            {
                using (EncoderParameter QualityEncoderParameter = new EncoderParameter(QualityEncoder, Quality))
                {
                    EP.Param[0] = QualityEncoderParameter;
                    Img.Save(FileName, jgpEncoder, EP);
                }
            }
        }

        public static void SaveAsGif(this Image Img, string FileName, Int64 Quality)
        {
            ImageCodecInfo gifEncoder = GetEncoder(ImageFormat.Gif);
            Encoder QualityEncoder = Encoder.Quality;

            using (EncoderParameters EP = new EncoderParameters(1))
            {
                using (EncoderParameter QualityEncoderParameter = new EncoderParameter(QualityEncoder, Quality))
                {
                    EP.Param[0] = QualityEncoderParameter;
                    Img.Save(FileName, gifEncoder, EP);
                }
            }
        }

        public static Image Resize(this Image Img, int Width, int Height, InterpolationMode InterpolationMode)
        {
            Image CropedImage = new Bitmap(Width, Height);
            using (Graphics G = Graphics.FromImage(CropedImage))
            {
                G.SmoothingMode = SmoothingMode.HighQuality;
                G.InterpolationMode = InterpolationMode;
                G.PixelOffsetMode = PixelOffsetMode.HighQuality;
                G.DrawImage(Img, 0, 0, Width, Height);
            }

            return CropedImage;
        }

        public static Image Resize(this Image Img, int Width, int Height)
        {
            return Img.Resize(Width, Height, InterpolationMode.HighQualityBicubic);
        }

        private static Rectangle EnsureAspectRatio(this Image Image, int Width, int Height)
        {
            float AspectRatio = Width / (float)Height;
            float CalculatedWidth = Image.Width, CalculatedHeight = Image.Height;

            if (Image.Width >= Image.Height)
            {
                if (Width > Height)
                {
                    CalculatedHeight = Image.Width / AspectRatio;
                    if (CalculatedHeight > Image.Height)
                    {
                        CalculatedHeight = Image.Height;
                        CalculatedWidth = CalculatedHeight * AspectRatio;
                    }
                }
                else
                {
                    CalculatedWidth = Image.Height * AspectRatio;
                    if (CalculatedWidth > Image.Width)
                    {
                        CalculatedWidth = Image.Width;
                        CalculatedHeight = CalculatedWidth / AspectRatio;
                    }
                }
            }
            else
            {
                if (Width < Height)
                {
                    CalculatedHeight = Image.Width / AspectRatio;
                    if (CalculatedHeight > Image.Height)
                    {
                        CalculatedHeight = Image.Height;
                        CalculatedWidth = CalculatedHeight * AspectRatio;
                    }
                }
                else
                {
                    CalculatedWidth = Image.Height * AspectRatio;
                    if (CalculatedWidth > Image.Width)
                    {
                        CalculatedWidth = Image.Width;
                        CalculatedHeight = CalculatedWidth / AspectRatio;
                    }
                }
            }
            return Rectangle.Ceiling(new RectangleF((Image.Width - CalculatedWidth) / 2, 0, CalculatedWidth, CalculatedHeight));
        }

        public static Image ResizeToCanvas(this Image Img, int Width, int Height, out Rectangle CropRectangle)
        {
            return Img.ResizeToCanvas(Width, Height, InterpolationMode.HighQualityBicubic, out CropRectangle);
        }

        public static Image ResizeToCanvas(this Image Img, int Width, int Height, InterpolationMode InterpolationMode, out Rectangle CropRectangle)
        {
            CropRectangle = EnsureAspectRatio(Img, Width, Height);
            Image CropedImage = new Bitmap(Width, Height);

            using (Graphics G = Graphics.FromImage(CropedImage))
            {
                G.SmoothingMode = SmoothingMode.HighQuality;
                G.InterpolationMode = InterpolationMode;
                G.PixelOffsetMode = PixelOffsetMode.HighQuality;
                G.DrawImage(Img, new Rectangle(0, 0, Width, Height), CropRectangle, GraphicsUnit.Pixel);
            }

            return CropedImage;
        }

        public static Image ResizeToCanvas(this Image Img, int Width, int Height, RectangleF CR)
        {
            return Img.ResizeToCanvas(Width, Height, InterpolationMode.HighQualityBicubic, CR);
        }

        public static Image ResizeToCanvas(this Image Img, int Width, int Height, InterpolationMode InterpolationMode, RectangleF CR)
        {
            Image CropedImage = new Bitmap(Width, Height);
            using (Graphics G = Graphics.FromImage(CropedImage))
            {
                G.SmoothingMode = SmoothingMode.HighQuality;
                G.InterpolationMode = InterpolationMode;
                G.PixelOffsetMode = PixelOffsetMode.HighQuality;
                G.DrawImage(Img, new Rectangle(0, 0, Width, Height), CR, GraphicsUnit.Pixel);
            }

            return CropedImage;
        }

    }  

}

Use this and your image is resized.

use it like this:

Image img = ImageExtensionMethods.Resize(image, 300, 100);

ImageExtensionMethods.SaveAsGif(img, logoPath, 65535);

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