Post-press binding quality management

Beijing Hualian Printing Co., Ltd. 2003 fleetingly passed away in quality, and the binding workshop also drew to a close. The quality management experience of the binding workshop is summarized as follows and shared with everyone.

Personnel requirements

Managers at or above the workshop must be familiar with the quality requirements and test methods for binding. Quality inspectors and supervisors at or above the assistant level must master the industry standards and the textbooks for primary and secondary school textbooks, printing quality standards and inspection methods. 》 These standards are based on work experience and the company's quality standards, and are personally trained and instilled by the workshop director. The pros and cons of quality, process design, and technical level are inseparable. The workshop team leader must be familiar with the process technology of the jurisdictional process and combine quality management and technology management.

Learn about the binding process

The binding process is extremely complex and its complexity is unmatched by any one process. There are more than a dozen processes in the binding process, and most of them have no commonality. Therefore, it is necessary to gradually understand and understand the processing sequence requirements so that correct management and operation can be achieved.

According to incomplete statistics, there are dozens of types of binding equipment in the printing industry. There are hundreds of types of products in the printing industry. There are a variety of new technologies and various binding materials. The changes in the cover materials and bonding materials are the most prominent. For example, the company recently won awards in Hong Kong. The cover of "Wuxi Color Plastic" and the EVA hot melt adhesives used in recent years are typical. Problems such as adhesives and bonding parameters are based on material properties and management personnel's experience in technology and testing. The company's various technical training plays a significant role.

Anti-proliferation

It is understood that many binding quality problems occur when the binding is completed or the book has been sent to the customer. Therefore, in the binding production process, prevention work must be done to prevent problems. Once quality problems occur, they should be dealt with promptly to avoid waste.

Years of quality improve the quality inspection system and requirements for binding workshops. Without a system, there is no management without requirements. In principle, a binding shop without inspection systems and quality standards is not perfect. However, with the system and requirements, only serious implementation can really play a role.

The inspection system and methods of the binding workshop are divided into four types: self-inspection, mutual inspection, layer-by-layer inspection, and sampling inspection. Self-inspection refers to the inspection of finished products or semi-finished products produced by oneself in the production process; mutual inspection refers to the mutual inspection and mutual supervision between the captain and leader of each process; the layer inspection refers to the next process. The inspection of the process; sampling inspection means that the professional quality inspectors regularly, quantitatively or randomly conduct sampling inspection on the semi-finished or finished products produced, in which the quality inspector is based on the sampling ratio, unqualified ratio of the binding workshop and the company’s The inspection basis and requirements are the standards for fair, fair and open service. Only in this way can we improve the quality of our products.

The binding workshop will hold a quality summary meeting on a regular basis to analyze the causes and solutions of the quality problems, discuss the future improvement methods and how to prevent them, and use the outstanding quality issues as education and training materials to continuously improve the comprehensive level by drawing lessons from failures. In fact, these quality problems are most directly related to the design of the process, the use of equipment and materials, and of course, there are also human factors. Workshop supervisors regularly hold training sessions to improve everyone's quality awareness and work responsibility. In addition, the most important point is that teamwork, encounter problems, and we unite together to face, rather than blame each other and shirk responsibility. In order to fundamentally solve the problem, only everyone can make concerted efforts to do a good job.

OCR use experience

In the actual production process, it often encounters the situation that the originals printed by the customer are required to be entered. Although it can be done using Wubi type or other input methods, if the OCR software is used, the operation can be performed easily while being able to quickly recognize the input. Fast and saves time and effort. OCR software plays a pivotal role in modern office work. The operation of OCR software seems simple, but there are many skills, and mastering its operation skills is very important for improving the recognition capability of OCR software.

OCR Technology:

Optical Character Recognition (OCR) is short for OCR. It uses scanners to input numbers, symbols, and texts into the computer in the form of graphical information, and then the corresponding software performs recognition processing. Each character on the manuscript becomes the correct standard. The code allows the computer to automate the entry of characters.

The basic processing of OCR can be divided into three steps: scan input, automatic identification, and finishing output. 1 The original document input on the scanner is only one page of graphic information. When identifying, the characters are separated from each other first, and then the feature vector analysis is performed word by word. 2 In the process of automatic recognition, there may be more than one similar character, and it is necessary to compare the word relationship, the sentence relationship, and the word meaning relationship so as to finally find out the correct code of the character. 3 Convert all scanned input information to the correct code file and store it in the computer. At present, commonly used scanner identification software includes the OCR, Tsinghua OCR, OCR, and OCR.

OCR is divided into two categories: printed text recognition and handwritten text recognition. Because each person's handwriting is different, even if the same person has different handwriting due to different occasions and times, it will cause great difficulty in automatically recognizing the handwritten text. Therefore, the accuracy rate of the handwritten manuscript OCR recognition has not yet reached a practical application. Degree.

The general process of scan identification:

1. Connect the scanner and the computer Connect the scanner and the computer through the data transmission line. The interface of the general scanner is the SISC interface or the USB interface.

2. Zoom preview and adjust image sharpness In order to achieve the best recognition effect, the minimum requirement for inputting originals during scanning is clear. You can use the “magnify preview” function to sample the text in the original and adjust it to an appropriate threshold. Can be scanned.

3. The tilt correction of the original As the recognition principle of OCR is based on the character mode, it is necessary to pay attention to whether the original is horizontal or not. In the specific implementation process, you can use the "automatic tilt correction" function to solve.

4. Pre-processing of originals Since the condition of originals is very different, some pre-processing is required before recognition. First, the noise and the image in the original should be removed. If the original contains an image, the OCR text segmentation will be affected and the OCR will not be recognized. When there is a column in the document, the identification range needs to be manually set. Only in this way can the continuity of the recognition result be ensured.

5. Choose the appropriate identification method In the specific identification, should pay attention to whether the original is horizontal or vertical, so choose the correct "arrangement format" in order to maintain its correspondence.

6. Start identification After confirming the above steps, you can press the "Identify" button. After the recognition is completed, the system enters the original proofreading interface.

7. Original proofreading Generally speaking, OCR will display blue for text that cannot be completely determined. Please confirm it with the user. However, it is worth noting that there may be errors in areas where there is no indication of an error. You can add and modify the required text in this interface through the text input method provided by the operating system.

8. Original copying The collated originals are generally saved in plain text format for easy editing of layout software calls.

Scanning identification should pay attention to the problem:

1. Original processing The quality of the original directly affects the quality of the scanned image, and it will directly affect the accuracy of the final OCR. For example, if the newspaper is properly processed before scanning, the final OCR effect may change. For low quality manuscripts such as newspapers, it is better to use a copying machine for copying before scanning. When copying, attention should be paid to adjust the contrast and brightness to make the background white, and the text color remains black. After the copy of the newspaper, OCR's accuracy has improved significantly.

2. Scanning Techniques (1)Be sure to place the original document in the scanner. Do not tilt it. Otherwise, the scanned document will be tilted and the OCR software will not recognize it correctly. For originals that cannot be straightened, they need to be corrected using the "automatic tilt correction" or "manual correction" function. If the document is slightly tilted during scanning, it can be corrected by using the “tilt correction” function of the OCR software.

When you scan the book, you should pay more attention to it. Because the spine tilt will cause the text in the middle part to be deformed, the book spine must be flattened before scanning.

(2) The original type should be set to line drawing, and the threshold value should be set to a larger value, generally set to 40% to 75%. If the original is clear, set the threshold to 40% to 55%; if the original is of poor quality, set the threshold to 60% to 75%.

It is also important to select the appropriate resolution. In general, it is appropriate to use a resolution of 200 to 300 dpi for scanning. If the resolution is too high, it does not make much sense and only increases the scan time.

(3) In most cases, scanned image files cannot be directly OCR-processed because the image files often have taint-interference recognition rates. The commonly used image processing software, such as Photoshop, ACDSee, etc. are all very effective. If there are fewer stains, you can use the eraser tool in the above software to wipe the stain off. However, if the quality of the original is poor and the original is full of blemishes, large areas of blemishes can be eliminated by adjusting the contrast and brightness of the image. Even if the scanned image file is not smudged, the contrast and brightness can be appropriately adjusted, which can increase the contrast between the text and the background, and improve the recognition accuracy of the OCR software.

In particular, it should be noted that no matter which image processing method is used, the continuity of text strokes must be ensured. Once there is a situation where there are missing strokes, the accuracy of recognition will be seriously affected.

3. Layout Analysis

If the original to be identified contains multiple fonts or text in multiple fonts, a layout analysis is required. The fonts with the same font size and font are divided into one block so that the OCR software can correctly identify the original. In addition, when dividing a text block, a number appears above each text block. If it is necessary to adjust the order of recognizing text, it must be set beforehand when the block is defined.

4.OCR software

OCR software