meitu xiu xiu

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When we find that the reduced image is blurred, we can reduce the image again. Open the picture software, such as Meitu Xiu Xiu, and then open the picture before reduction, and select "Crop Rotation".

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Select Modify Size, enter a reduced width and height, such as width 300 and height 225, and then click Apply.

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The reduced figure is as follows, which is very small.

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Press Ctrl+S to save, and the "Save Share" dialog box will pop up. Select the format to save as "JPG".

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Drag the Save Image Quality button to the far right, and then press Save.

Description: Left: low quality, right: high quality.

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Re-inserting the reduced image into the file, we can see that when the image is enlarged again, the petal edge is also very clear.

Special tips

Only when saving in jpg format can the degraded image quality be changed.

How to improve the quality of JPEG format picture catalog Method 1: Use Pixlr 1 to download or start online Pixlr. 2. Open the image you want to edit. 3. Adjust the image. 4. crop the image. 5. Reduce image noise. 6. Use the Imitation Stamp Tool to polish the details. 7. Adjust the color and contrast of the image. 8. Fine-tune the image with various tools. 9. Apply special effects to the image. 10. Save the image and adjust the quality. Method 2: Use topaz dejjpeg1to check whether topaz dejjpeg is suitable for your picture editing software. 2. Download and install the plug-in. 3. Import DeJPEG into photo editing software. 4. Start the filter. 5. Zoom in on the problem area. 6. Browse the default preset. 7. Adjust the slider in brightness mode. 8. Adjust the color details. 9. Zoom out and see the changes. 10, click "OK" to process the picture. Method 3: Use AdobePhotoshop 1 and consider the image quality you really need. 2. Zoom in and take a closer look. 3. Find the "noise reduction" filter. 4. Adjust the noise reduction options. 5. In a large area with few details, such as human skin, cheeks, hair, etc. , try to reduce mosquito noise and color patches. 6. Use "rubber stamp" or "imitation tool" in areas with complicated image details such as eyes, teeth and insect wings. 7. Reuse these tools until you are satisfied. 8. Save the image in high-quality JPEG or PNG format, which supports more colors. JPEG, also known as JPG, is a compressed image with small files, which is very suitable for sharing or publishing on the Internet. When you try to enlarge or reuse it, the image may appear grainy or pixelated. You can use the photo editor to fine-tune the appearance, color and contrast of the image, thus improving the image quality. If you are familiar with image processing, the function of TopazDeJPEG can complement the software you are currently using. If you are a novice, you can try free software such as Pixlr. If you are already familiar with Photoshop, you can use Photoshop's powerful tools to improve image files!

Method 1: Use Pixlr.

1. Download or start online Pixlr. Pixlr is a powerful photo editing tool for professionals and photo editing enthusiasts. Pixlr provides a free online editor and basic versions of desktop and mobile applications. You can also upgrade your product to a more advanced version through regular ordering. PixlrEditor is the company's web application. Click here to start PixlrEditor:

PixlrExpress is the company's web, Apple and Android applications. You can download it for free from GooglePlay or the Apple App Store, or visit.

2. Open the image you want to edit. The quality of an edited image depends on the resolution or number of pixels of the original image. Pixlr strongly recommends that users use high-resolution images when creating projects. This is especially true when you want to enlarge an image, because when you increase the size of a low-resolution image, the spacing between pixels will increase, which will cause the image to look distorted. Use: PixlrEditor when uploading photos. Click the Browse button, select a JPEG file, click OK, or click the Open URL button to find an image on the web page.

Pixel expression. Click the "Photo" button and select a photo from the gallery of your mobile phone or tablet. You can also click the "Camera" button to take a new image for editing.

3. Adjust the image. The size of the file is determined by the number of pixels. The higher the number of pixels, the larger the file. Uploading, downloading and emailing large JPEG files can be slow. Reducing the number of pixels in an image allows you to share images faster. If you use the PixlrEditor to resize the image, select resize > resize. Change the pixel size to the desired size, check Maintain Aspect Ratio, and then click Apply.

If you use PixlrExpress to resize the image, click Finish and select Resize. Change the pixel size to the desired size, check Maintain Aspect Ratio, and then click Apply.

4. crop the image. Cropping makes it easy for you to delete unnecessary parts of a photo. Cropping the image will also reduce the file size. If you crop an image using the PixlrEditor, select adjust > cut. Manually change the width and length of the border. Click anywhere outside the image. If you are satisfied with the new size, click Yes in the dialog box that appears.

If you use PixlrExpress to crop images, select tools >; "Cut". Enter the desired pixel size, or select the preset size option from the drop-down menu.

5. Reduce image noise. You can use this filter for free only when you use PixlrEditor or subscribe to Pixlr. Select filter > denoising. The word "denoising" will flash above the photo, indicating that the image noise or visual distortion is reduced. Continue to reduce noise until the desired effect is achieved. You can't control how much noise you reduce at a time.

6. Use the Imitation Stamp Tool to polish the details. This feature is only available for free on PixlrEditor. Pixlr's Imitation Stamp Tool allows you to capture and copy a part of an image. You can use this tool to copy and paste a single pixel or an entire image. Because the imitation stamp tool can capture and copy a variety of colors, it is very effective to eliminate or reduce mosquito noise in detail areas. Zoom in until you can see a pixel. Select view > zoom in.

In Pixlr, the Imitation Stamp Tool has a brush. Select the brush tool and adjust the settings. Select the soft-edged brush from the second line to reduce the opacity. Soft edges and low opacity allow you to mix colors.

Select "Stamp Imitation Tool", which is located directly below the icon of paint bucket. Move the cursor to the position where you want to capture and copy. Windows users must hold down Alt, alt, and Mac users must hold down Command to start the stamp imitation tool. Click the area when the key is pressed. Release the button and mouse.

To use the Clone Stamp tool, move the cursor to the area to be decorated, and then click. If necessary, repeat the operation.

Throughout the process, you can zoom in and out to check the work.

7. Adjust the color and contrast of the image. Pixlr provides users with ways to change and enhance images. You can use the color tools to adjust the hue, saturation, brightness and natural saturation of an image. If the image is overexposed or underexposed, you can use the Contrast tool to change the contrast or brightness of the image. If you access these tools in Pixlr, select Adjust >; "color or adjustment" > "contrast".

If you access these tools in PixlrEditor, select Adjust >; "color or adjustment" > "contrast".

If you access these tools in PixlrExpress, select Tools >; Adjust > Color or Adjust > Contrast.

8. Fine-tune the image with various tools. Pixlr is equipped with several brush-like tools and filters, which can make up for small defects and change the whole picture. These tools include: Sharpen: Sharpen blurred edges.

Blur: Softening rough edges

Smudge: blending pixels

Sponge: "Absorbed" or "Saturated" color.

Dimming: Increase the brightness of the image.

Darken: darken the picture or increase the contrast.

Stain repair: remove stains and traces from pictures.

Expansion: create a concave effect

Shrinkage: to produce a convex effect

Eliminate red eye: eliminate red eye

9. Apply special effects to the image. By using the special effects package of Pixlr, each pixel in the image is changed. Each special effects tool uses a function method to change the appearance of a single pixel. Pixlr provides nine different special effects. Each special effect has several sub-special effect options. Categories include: Atomic, Creative, Default, Soft, Exquisite, Retro, Monochrome and Nostalgia.

10. Save the image and adjust the quality. After editing the image, select file > save as and click the save button, or select save image. If you use Pixlr or PixlrEditor, a dialog box will appear on the screen. In Pixlr, you can choose to rename the image, select Type File, select JPEG, and determine the location where you want to save the image. When you are finished, click Save. In PixlrEditor, you can choose to rename the file. You will be prompted to select Image Quality before saving the image. High-quality images have less compression and more pixel data, so the files are bigger and the images are clearer.

Low-quality images have a higher degree of compression, and pixels contain less data, resulting in smaller files and unclear or pixelated images.

Method 2: use TopazDeJPEG

1. Check whether TopazDeJPEG is suitable for your picture editing software. TopazDeJPEG is a plug-in for improving JPEG images, which is used in all major photo editing software. The free trial version of this plug-in can be used with AdobePhotoshop(Windows and Mac), PaintshopPro(Windows), PhotoImpact(Windows) and Irfanview(Windows).

2. Download and install the plug-in. Access Download Now in your browser. Scroll down to TopazDeJPEG and select your operating system (Windows or Mac). The download will begin and your trial license key will be sent to you by email. Close Photoshop. If you use AdobePhotoshop, you need to close it before running the DeJPEG installer. Other programs don't have to do this step.

Run the setup program. Double-click the downloaded installation file to start the trial. When prompted, enter the trial license key (sent to your email) and click Install to start installing the plug-in.

3. Import DeJPEG into photo editing software. Before using this plug-in, you need to add the DeJPEG filter folder to the program. The full path of the DeJPEG plug-in folder is program files >；; & gt Topaz Labs & gt> Topaz DeJPEG 4. Photoshop: Since DeJPEG is automatically installed in the Photoshopplugins folder, Photoshop users can skip to the next step.

PaintshopPro: in the file menu, select preferences, and then select the file location. Select Plug-ins on the left side of the screen, and then click the Add button. Navigate to the DeJPEG plug-in folder and click OK.

PhotoImpact: Open the program and press F6 on the keyboard. Select plug-ins from the list, and then click?. The end of the first empty plug-in folder in the list. Button. In the folder list, select the DeJPEGplugin folder and click OK. Please restart the filter before the first attempt.

IrfanView: Open the program and expand the Image menu. Click Special Effects, and then click Adobe8BF Filter. Select Add 8BF Filter from the menu. Navigate to the DeJPEGplugin folder and click OK.

4. Start the filter. Open JPEG images in commonly used photo editing software, and then start the DeJPEG tool: Photoshop: Select TopazLabs in the filter menu, and then select DeJPEG4.

PaintshopPro: select "plug-in" in the special effects menu, and then select "TopazDeJPEG".

PhotoImpact: open the special effects menu and select "TopazDeJPEG".

IrfanView: Open the Image menu, click Special Effects, and then select Adobe8BF Filter. Select TopazDeJPEG from the filter list.

5. Zoom in on the problem area. Click the magnifying glass (+) to enlarge the part of the image with obvious compression distortion.

6. Browse the default preset. The default preset provided by DeJPEG is located on the left side of the screen. Click each default setting to apply it to the image preview. Notice how each preset improves or reduces the image quality. Select the preset that is most suitable for JPEG images. It doesn't matter if it's not perfect, there are many settings to adjust.

7. Adjust the slider in brightness mode. From the options in preview display mode, select brightness. Click "Main Menu" to view multiple options and determine preset details. Reduce distortion: first move the slider to the far left. Then when viewing the details in the preview pane, gradually move the slider to the right. When you move the slider to the right, the edges may soften, but the noise and chessboard will disappear. Continue to move to the right until you find the right balance point.

Sharpen: Redefine the edge softened by the Reduce Distortion slider. When you move the slider to the right, the clarity increases.

Sharpen radius: It should be used with the Sharpen tool. Try moving the slider left and right until the edges look clear and the distortion disappears.

8. Adjust the color details. If the image color seems to be influenced by the previous tools, in preview display mode, select Color to switch to color mode. Smooth color: Move left and right until you are satisfied with the image in the preview pane.

Clear the edge radius. If you want to adjust the edge color details, click Advanced settings, and then move the Clear Edge Radius slider to the right. Use it with the edge threshold slider until you are satisfied with the picture.

Adjust the saturation. If the color is light, move the Saturation slider to the right to increase the color purity.

Add particles. Try using the Add Particle slider to make the image look more natural. Move the slider to the right to increase the number of particles.

9. Zoom out and see the changes. Before saving your work, click the magnifying glass (-) until you can see the whole image in the preview panel. If you don't like the effect presented, continue to adjust the preset, brightness and color settings until you are satisfied with the whole photo.

10, click "OK" to process the picture. You may have to wait a while before applying the filter.

Method 3: Use AdobePhotoshop

1, consider the picture quality you really need. It takes a lot of time and energy to repair the details of low-quality JPEG images. If time is short or Photoshop is not installed, please refer to TopazDeJPEG usage.

If you want to improve the pictures used in applications such as Facebook or Instagram, this method is not as effective as using applications with filters. Pixlr comes with a free filter to modify defective JPEG images. If you want to make your pictures popular and don't care about lossy compression, you can try Pixlr.

2. Zoom in and take a closer look. Open the JPEG image in Photoshop, and then click the magnifying glass (+) in the upper left corner of the toolbar to enlarge it. Continue to click this button until the percentage in the lower left corner of the screen shows "300%". Pay attention to the frame and compression discoloration when zooming in to this extent.

3. Find the "noise reduction" filter. Open the Filter menu, select Noise, and then select Noise Reduction.

4. Adjust the noise reduction options. First, select the Preview check box to see the changes in real time. Intensity: this value indicates the expected degree of noise elimination; Jpeg pictures with poor quality should have higher value. Drag the slider to the right to see the effect of improving the intensity setting.

Preserve details: The lower the scale, the more blurred and softer the image will be, but the noise will also be reduced.

Sharpen Detail: You may want to use a higher Sharpen Detail setting to make up for the lower Preserve Detail setting, because this will make the edges of the image clearer. Make sure Remove JPEG Distortion is selected.

If you are satisfied with the preview image, click OK to save the new image.

5. In a large area with few details, such as human skin, cheeks, hair, etc. , try to reduce mosquito noise and color patches. Your goal is to make the transition of different colors in the image as smooth as possible. Important details of specific objects such as eyes and ears are left to "rubber stamps" or "imitation tools" (which will be introduced later). Enlarge the picture until you can see the color blocks (small colored squares) clearly in the workspace.

Using the eyedropper tool, select the color near the color block to be removed.

Select the brush tool. Color the color block slightly. Set the brush hardness to 10%, opacity to 40%, and flow rate to 100%.

Use a paint brush to "smear" the color block with one button. Don't hold down the cursor, or it will look unnatural. By switching colors freely, the color, shadow and highlight of the original image can be matched accurately.

Reduce the opacity of the brush to 10% to smoothly transition various areas, such as the junction of eyebrows and skin. Choose a color from the junction of skin and eyebrows and apply this transition space. Because of the low opacity, any change you make is gradual, so it looks natural, so don't be afraid to paint skin on the edge of eyebrows, and vice versa.

6. Use "rubber stamp" or "imitation tool" in areas with complicated image details such as eyes, teeth and insect wings. Because it is difficult to choose a color suitable for painting these areas with a brush, we can use a "rubber stamp" to obtain accurate color matching to make up for this. Rubber Stamp allows you to select an area of an image, and then apply it directly and copy it to other parts of the image. While holding down the Alt key, click the eraser or imitation stamp until the cursor becomes a crosshair. Select the area next to the color patch or other compression distortion, but avoid the color patch area. Do not use the stamp tool in the compression deformation area.

Set the brush size to be suitable for handling compression distortion, and it is better to set the brush between 1 and 10px. Set the Hardness to 10%-30% and the Opacity to 30%. Use one-button "daub" to repair the wrong color block. When the cursor moves over the image, hold down the alt key and reselect the area where you want to use the stamp tool.

Reduce the opacity of the transition zone. The wrong color block sometimes interferes with the shape of the image. Note that the iris is not a smooth circle, but an irregular convex line. You may need to use the smudge tool to redraw the edge damaged by the wrong color block.

7. Reuse these tools until you are satisfied. Zoom out to 100% from time to time to view the whole image.

8. Save the image in high-quality JPEG or PNG format, which supports more colors. Don't let your efforts go to waste because the image is compressed again. In Photoshop, open the file >; & gt save as web page and device.

In the drop-down menu, select JPEG and set the quality value between 80 and 100. Please note that the higher the quality, the larger the file.

Or select "PNG-24" to save the file in PNG format. PNG images are usually larger than JPEG images, but PNG is not serious about image compression.

Tip: Don't be afraid to change the settings of brushes and rubber stamps at will, especially when you are more proficient in using Photoshop. If you don't like the adjustment results of the smudge tool, just change the settings.

Photoshop history can only retain a certain number of operations. In order to repair the image, many operations are needed. You may shrink the picture and find a major flaw, which appeared before the current Photoshop saving operation. To prevent this from happening, you often use snapshots for images, so that if you don't like the changes made to the images, you can restore the images to the state when using snapshots. The snapshot button can be found at the bottom of the history panel. Scroll up to the top of the history panel to see all snapshots.

If you are working with photos, please pay attention to the different colors in the photos. Blue flowers may have shades of blue, navy blue, green, purple and brown. , depending on light, shadows and reflections. Try mixing these colors with a brush tool with low transparency. If there are many different colors in a small space, consider using the rubber stamp tool instead.

Why is the image quality blurred after compression? Is there any way to reduce the image file compression without blurring the image quality, but the image quality of the image file remains unchanged? You can use the following methods:

1, get tools "

Master of second compression

",select the operation.

2. Import a picture file for operation.

3. Finally, wait for the picture to be compressed.

4. Explain the compression mode:

Zoom out first (suitable for side view and reduced view)

Balanced compression (applicable to

e-mail

And message transmission)

Clear priority (suitable for viewing)

Recommended reason:

1.__J Design: You can choose the image compression method according to your own needs (such as reduction first and definition first), and support custom definition, resolution, format and required size of image compression.

2._. Simple and quick operation: you can upload multiple image files to be compressed at one time and compress images in batches. Support to confirm whether the compression result achieves the expected effect according to the comparison of file size before and after compression, saving the time and cost of image compression.

3.__U title: The online version of image compression carries out multiple encryption processing on the compression process. After compressing the image files for 30 minutes, all the files will be permanently deleted from the server. During this period, no one can consult or download these files, so that your files and privacy can be guaranteed.

Support a variety of formats: picture: support JPG, PNG, GIF, BMP and other picture formats; Video: Support MP4, MKV, MOV, AVI, WMV, M4V, MPEG, etc.

Progressive speed of walking in unison

; PDF:PDF documents can be compressed; Word: supports Word formats such as doc and docx; Ppt: PPT formats such as PPT and pptx are supported;