In batch compression, we often store the photos we take on computers or mobile phones. However, as the shooting equipment is becoming more and more powerful, the photos taken are becoming clearer and clearer, so the photos are getting larger and larger, which is not only inconven

photos are compressed in batches. Many times we will store the photos we take on computers or mobile phones. However, because the shooting equipment is becoming more and more powerful, the photos taken are becoming clearer and clearer, so the photos are becoming larger and larger. Not only is it inconvenient to transmit, it will also occupy a lot of storage space. So how should this problem be solved? It is actually very simple. The most important thing is how to batch compress and enlarge the picture without losing the quality of the picture. The following article will introduce you to how to quickly batch high-definition lossless compression or enlarge pictures. First, it supports image compression and enlargement in any format, so that everyone can have high-definition lossless pictures. At the same time, the software is also equipped with batch watermarks, batch downloading of pictures and other functions. As shown in the picture

Friends who often visit websites will always encounter uploading pictures when they require that they cannot exceed 10KB?20KB?...the image size limit. Sometimes it feels very annoying, but this cannot be blamed on the website maker. If there is no restriction on uploading pictures, it may affect the normal operation of the website.

chromaticity (or color) subsampling

Our eyes are more tolerant of the loss of color details in the image (chromaticity) than brightness (referred to as the measure of brightness—a measure of brightness). Chroma subsampling is a form of compression that reduces the accuracy of color in signals that are beneficial to brightness. This can reduce file size (15%-17% reduction in some cases) without negatively affecting image quality and can be used for JPEG images. Subsampling can also reduce the memory used by the image.

Since contrast is responsible for forming the shape we see in the image, it is very important to define its brightness. Older or filtered black and white photos may not contain colors, but they can be as detailed as color photos due to brightness. Chroma (color) has less impact on visual perception. The JPEG of the subsampling configuration is of quality 80.

For most types of images, chroma subsampling is worth considering. It does have some notable exceptions: Because subsampling depends on the limitations of our eyes, it is not suitable for compressing images where color details may be as important as brightness (such as medical images).

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images containing fonts will also be affected, because poor subsampling of text will reduce its readability. Sharp edges are difficult to compress with JPEG because JPEG is designed to better handle transitional soft photo scenes

"ALT attributes" are also called "ALT tags" or "ALT descriptions" which are alternative texts to the picture, and use one sentence to describe the content in the picture. Used to help search engines understand the content of pictures, because search engines cannot understand pictures and only understand text, so text needs to explain the content of the picture to search engines, which can help improve your store's SEO.

SEO refers to Search Engine Optimization, which is simply the result of optimizing search. SEO's feature makes it easier for your customers to find your products when searching for them, increasing the chances of store exposure and bringing more sales.

Step 1: Optimization of the picture itself

, Size and Size: Many people don’t know why some websites on the left side of the search results will have a small picture, while some do not. The main reason is that the size of other people's images meets the requirements of search engines. It is recommended that the general size width and height ratio is: 121:75. The image size of this ratio is more reasonable and is convenient for the display on the left side of the search engine.

2. Volume size: It is best not to exceed 200K for an image. If it is too large, it will cause the web page to load too slowly, affect the user experience, and the website bounce rate will also increase.

3. Clarity: The impact of image clarity on user experience does not need to be explained much. If it is not clear, many times users will close the web page if they cannot see the important information on the picture.

4. Remove watermarks: Most of the pictures we use are searched online, but in fact, many of them have watermarks added by others, so when using the pictures again, remember to remove the watermark.

5. Picture "original": Search engines like fresh things, go directly to Baidu to steal the pictures, the similarity is too high. I deliberately search for beautiful pictures that have not been included on the picture platform. Of course, those who understand PS can also make pictures themselves.

Step 2: Optimization of matching pictures and text

, Alt tag optimization: Do a good job of supplementing Alt attributes to ensure that the Alt content is similar to the content displayed in the picture.

2, Title tag optimization: the alt tag and the title tag can be used at the same time, but do not deliberately pile up keywords, as it will affect the later inclusion.

3. Optimization of text around the picture: Increase the recognition of search engines and visitors. If necessary, some text can be interspersed below the picture for explanation, especially some data table pictures. Of course, remember not to deliberately pile up keywords.

4. Picture naming: The name of the picture cannot be used in Chinese. At the same time, the name of the picture can be named using the pinyin of the keyword. For example, the picture of a mobile phone rendering can be named with "shoujixiaoguotu" to increase the matching degree of keywords.

Step 3: Optimization of pictures in the website

. Pictures should be uploaded locally: Many friends like to copy and paste pictures online directly. Most of the pictures will be damaged in the later stage. Not only that, they will also leave other people's website links. The best way to save the image locally and upload it.

2. Use the "width, height" tag to set the width and height of the picture: When search engines crawl, how to determine whether the image size meets the crawling standards? A big reason is the "width, height" tag in the picture. Therefore, when setting the tag, it is best not to use the default width and height. It is best to set it on this site.

All SEO optimizations are to enhance user experience and appetite for search engine crawling. Focus on these two aspects to optimize, and do a lot of small details well and quickly obtain rankings on the website. It is actually very easy. The SEO team of Shanghai Website Construction Company is the best choice for you to choose website hosting. There is a professional management team here to solve your worries.