Many paper contracts, receipts, and files develop gray backgrounds, blurry text, and dark pages after being photographed or scanned. Adjusting them one by one with photo editing software is very time-consuming. This article uses HeSoft Doc Batch Tool as an example to introduce how to use the image effect enhancement feature in photo tools to batch import multiple scanned JPG images, and use options such as text clarity (binarization) to process gray-background images into clearer effects closer to black text on a white background, suitable for batch organization scenarios involving contracts, materials, exam papers, and files.
In daily office work, many people encounter this situation: after taking a photo of a paper contract, archive, document page, bill, or test paper with a mobile phone, the image looks generally grayish; the background of pictures generated by a scanner is not white enough, and the text is not sharp enough; some images are still legible, but once inserted into Word, organized into a PDF, sent to a client, or used for archiving, they appear unprofessional. If there are only one or two images, manually using photo editing software to adjust brightness and contrast is acceptable; but if a folder contains dozens or hundreds of scanned JPG, JPEG, or PNG images, processing them one by one wastes a lot of time.
The problem this article aims to solve is clear: how to batch-process many scanned grayish images to make them clearer and brighter, achieving a near white-background-with-black-text effect. Below, with the aid of screenshots and using the office software " HeSoft Doc Batch Tool " as an example, we will introduce the complete approach from entering the function, importing images, setting text clarity, to batch processing output. This software is positioned as a batch processing tool for documents and images. Its core value lies in reducing repetitive operations, making it especially suitable for office scenarios that require uniform processing of large volumes of files.
Applicable Scenarios: Which Scanned Images Are Suitable for Batch Clarity and Brightness Enhancement
Batch image enhancement is not just "beautifying pictures"; it is more commonly used for office document organization. As long as the main content of the image consists of text, tables, contract clauses, bill fields, archive pages, or test questions, and it suffers from being grayish, dim, or having an unclean background, you can consider using this type of batch processing method.
Common applicable scenarios include:
- Scanned contracts: For example, a multi-page contract photographed with a grayish, dim background makes clause text not prominent enough, requiring organization into clear images or subsequent PDF compilation.
- Archival materials: Historical materials, certificates, paper forms, etc., need uniform readability enhancement for archiving.
- Bills and vouchers: Images of invoices, receipts, expense reports, delivery receipts, etc., with a grayish background affect viewing and printing.
- Teaching materials: Test papers, lecture notes, exercises photographed under uneven light, which you hope to batch-process for a cleaner reading effect.
- Office collaboration: Before inserting images into Word documents, docx reports, PPT presentations, or converting them to PDF, uniformly optimizing image clarity first.
Please note that the method introduced in this article is more suitable for scanned images that are "primarily text-based". If the images are portraits, product photos, or landscapes, overly strong binarization processing might lose grayscale layers and may not be suitable.
Effect Preview: Comparison Before and After Processing
First, let's look at the scanned image before processing. The original image is a page of an English contract. The overall background is significantly grayish, and the paper edges and shooting environment also carry gray shadows. Although the text is legible, the page is not bright enough, and there is a timestamp watermark at the bottom. For office materials that need to be printed, archived, or sent to others, such an image looks not clean enough visually.
After processing, the page background becomes noticeably whiter, the text turns into clearer black, and the contrast of the contract title, paragraph numbers, and body text is stronger. The previously grayish hazy background is significantly weakened, making the overall effect closer to a black-and-white document generated by a scanner, facilitating easier reading and subsequent organization.
From this set of comparisons, it's clear that the key to batch-enhancing the clarity of scans is not simply increasing brightness, but making the boundary between text and background more distinct. The processing approach in the screenshots mainly used the "Text Clarity (Binarization)" option. This type of setting is suitable for processing grayish-background text images into an effect closer to a pure white background and pure black text.
Steps: Batch Enhancing Scanned Image Effects with Office Software
Below, following the order of the operation screenshots, we explain how to complete batch processing in HeSoft Doc Batch Tool . The entire process adopts a wizard-style operation: first select the function, then import files, then set processing options, and finally set the save location and start processing. For users who need to process many scanned images, this process is more efficient than opening photo editing software image by image.
Step 1: Enter "Image Tools" and select "Image Effect Enhancement"
After opening HeSoft Doc Batch Tool , you can see multiple office file processing entries in the function categories on the left, such as Word Tools, Excel Tools, PowerPoint Tools, PDF Tools, Text Tools, and Image Tools. Since we need to process scanned images this time, first click "Image Tools" on the left.
On the Image Tools page, the function list shows multiple batch processing functions related to images, such as converting images to PNG, BMP, GIF, JPEG, JPG, TIFF, WEBP, etc. According to the screenshot, the first function "Image Effect Enhancement" should be selected this time. Its description is "Batch set various effects for images, such as: rotation, opacity...". Its purpose is to uniformly apply enhancement effects to multiple images.
The purpose of selecting "Image Effect Enhancement" is to enter a dedicated image optimization process. Unlike format conversion, this step focuses on the readability and visual effects of the image content, such as making scanned text clearer and the background cleaner.
Step 2: Add the Scanned Images to Be Processed
After entering the "Image Effect Enhancement" function, the top of the interface provides two entry points: "Add Files" and "Import Files from Folder". If you only need to process a small number of specific images, you can use "Add Files"; if the scanned copies are all concentrated in one folder, it's more recommended to use "Import Files from Folder", as this can import all images in the entire folder at once, reducing the time spent repeatedly selecting files.
In the screenshot, 10 JPG files have been imported, with filenames from contract-1.jpg to contract-10.jpg, and the path shows these images are located in the 'images' folder on the desktop. The list also displays information like extension, creation time, and modification time, making it easy to confirm if the imported files are correct. The summary area below shows "Records: 10", indicating the current number of records to be processed is 10.
The expected result of this step is: all scanned images that need to be made clearer and brighter should appear in the task list. After importing, it is recommended to quickly check the number and names of files to avoid missing pages or mistakenly selecting other images. If a specific image does not need processing, it can be removed via the delete icon on the right side of the list.
After confirming the files are correct, click the "Next" button at the bottom of the page to enter the processing option settings.
Step 3: Enable "Text Clarity (Binarization)" and Adjust Intensity
On the "Set Processing Options" page, you can see multiple selectable effects, including Rotation Angle (Clockwise), Opacity Level, Shrink or Enlarge, Text Clarity (Binarization), Brightness, Contrast, Sharpening Level, etc. Each item has a switch on the left indicating whether to enable that effect. Since the goal of this article is to turn grayish scans into clearer black-and-white document effects, we focus on enabling "Text Clarity (Binarization)".
In the screenshot, "Text Clarity (Binarization)" is already enabled, with the slider position shown as 45%. The left side of the slider is labeled "Pure White," and the right side "Pure Black," indicating that this option affects the tendency of gray areas in the image to be processed into white or black. For text-based images like scanned contracts, forms, and test papers, appropriately setting the binarization intensity can make the background whiter and text blacker, thus enhancing readability.
It is not recommended to push the intensity to the extreme immediately. For images with thin text and heavy paper shadows, an excessively high processing intensity might make some fine text become thicker, stick together, or even lose light-colored stamps or handwriting traces; conversely, too low an intensity might not clearly remove the grayish background. The 45% shown in the screenshot is a relatively intermediate setting, suitable for a first attempt. In actual use, you can fine-tune it based on image quality.
If the image is only slightly dim, you might also consider combining it with options like Brightness, Contrast, or Sharpening Level. However, as seen in the screenshot, this demonstration mainly uses "Text Clarity (Binarization)" to achieve the white-background-black-text effect. Therefore, avoid arbitrarily stacking too many effects, as it may affect the text edges.
Step 4: Set the Save Location to Avoid Overwriting Originals
After completing the processing options, continue by clicking "Next". According to the interface flow, the subsequent step will lead to "Set Save Location". The purpose of this step is to decide where the processed new images will be saved. For office document processing, it is recommended to save the output files to a separate new folder, such as "Clear Scans", "Processed Images", or an archiving directory corresponding to the project.
There are three benefits to saving separately: First, you can keep the original scanned images for future comparison or reprocessing; second, the processed images are easier to view and send all in one place; third, if the effect on some pages is unsatisfactory, you can go back to the originals to readjust parameters without being unable to recover due to overwriting.
Although the screenshot does not show the details of the save location page, the progress bar clearly indicates that the third step is "Set Save Location", so in actual operation, you should follow the software wizard to complete the output directory settings.
Step 5: Proceed to Start Processing and Batch Generate Clear Images
After setting the save location, continue to "Start Processing". The software will batch-process the multiple scanned images according to the previously imported file list and the configured effects. The advantage of batch processing compared to manual retouching is: as long as the parameters are uniform, all contract pages, document pages, or bill images will be output according to the same standard, avoiding stylistic inconsistencies caused by manual adjustment one by one.
After processing is complete, open the output folder to view the results. If there are many images, you can first randomly check a few key pages, such as the first page, the page with the most dense text, or the page with the dimmest lighting. If these pages meet expectations, it usually indicates that the current parameter settings are quite appropriate.
Common Questions and Considerations
1. Is higher binarization always clearer?
No. The purpose of Text Clarity (Binarization) is to distinguish the gray background and black text more clearly, but excessively high intensity might make fine text thicker with harsh edges, or even cause light-colored content to disappear. It is recommended to start with a medium intensity, such as the 45% shown in the screenshot, then fine-tune based on the actual effect.
2. Can shadows or watermarks on the original image be completely removed?
Image effect enhancement can significantly improve the grayish background and text contrast, but it should not be understood as a universal fix. If the original image has severe shadows, reflections, creases, timestamp watermarks, or occlusions, some traces may still remain after processing. For better results, you should try to keep the page flat and the lighting even during the initial photographing or scanning stage.
3. Can JPG, JPEG, and PNG all be processed?
From the import list in the screenshot, it can be seen that JPG images were processed this time. The software's Image Tools also provide various image format-related functions, such as format conversion for PNG, JPEG, JPG, TIFF, WEBP, etc. In actual batch enhancement, please refer to the image formats supported by the software during import. Common scanned image formats in office work are typically jpg, jpeg, or png.
4. Can the processed images still be used for Word, PDF, or printing?
Yes. The processed images, with a whiter background and blacker text, are usually more suitable for insertion into Word, docx documents, subsequent compilation into PDF files, and are also better for printing and reading. However, if you intend to perform OCR text recognition, it is advisable to first check the processing effect to ensure text has not become illegible due to excessive binarization causing characters to stick together.
5. Is it necessary to set parameters individually for each image?
If a batch of images comes from the same source and was shot under similar conditions, you can uniformly use the same parameters for batch processing, which is the core value of using office software for batch file processing. If image quality varies significantly, for example, some are very dark and some are very bright, you can import them in batches and set more suitable parameters for each group.
Summary: Batch Processing Makes Organizing Scans More Efficient
For a large number of scanned grayish images, the real time-consumer is not how to adjust a single image, but performing the same adjustment action repeatedly. Using the "Image Effect Enhancement" function of HeSoft Doc Batch Tool can string the steps of entering the function, importing files, setting text clarity, saving output, etc., into a batch process, making multiple contracts, archives, bills, or document images clearer and brighter in one go.
If you also have a batch of scanned images with grayish backgrounds and less prominent text, you can follow the steps in this article: enter Image Tools, select Image Effect Enhancement, batch import images, enable Text Clarity (Binarization) and set an appropriate intensity, then save to a new output folder. This way, you can keep the original images while quickly obtaining clearer versions better suited for reading, archiving, printing, and sending.