This Answer will walk through the concept of template matching and demonstrate its implementation using OpenCV, an impactful open-source toolkit utilized for tasks in computer vision and machine learning.

DSLRscanningtips

The iXH Camera System is equipped with PPI-Assist, which accurately measures the distance to the object and records PPI, field-of-view and magnification, making it easy to position the iXH on any copy stand for a given scanning application. In combination with the Phase One AutoColumn copy stands and Capture One CH, the iXH Camera System delivers automated camera positioning for a specified PPI.

Square difference (CV_TM_SQDIFF): This method calculates the squared difference between the pixel intensities of the source image and template. A lower score indicates a better match.

Scanner

With a capture rate of 1 image per second, Phase One Film Scanning & Digitization Solutions are up to 400 times faster than flatbed, drum or virtual-drum scanners.

Are you interested in learning more about our film digitization solutions? Fill out the form, and a Phase One Cultural Heritage expert will be in touch shortly.

Negative Lab Pro

The Phase One iXH Camera System comes with a Schneider Kreuznach 120mm Macro RS lens. The lens is equipped with the Reliance Shutter – rated at 1 million actuations, and allows for reliable and consistent capture of the finest detail with minimum vibration.

Phase One’s Glass Plate Carriers support most common and odd plate formats, and are equipped with an optically-optimized glass base. The Glass Plate Carriers are made of milled high-grade aluminum and are built to last. They provide an economical solution for almost all types and sizes of plates.

Phase One’s Film Carriers are designed to work with the Phase One Film Capture Stage, and maintain film flatness with a minimal amount of stress and easy mounting/dismounting. Made from milled high-grade aluminum and using an optically-optimized glass base, they maintain parallelism and flatness.

The Slipstream mode – a simplified user interface front-end – allows for capturing to be handled by less-skilled operators, and speeds up the workflow, especially when working on large collections and large volumes of documents.

Phase One’s Glass Plate Carriers support most common and odd plate formats, and are equipped with an optically-optimized glass base. The Glass Plate Carriers are made of milled high-grade aluminum and are built to last. They provide an economical solution for almost all types and sizes of plates.

The Glass Plate Carriers work with specially-designed “top stop” which ensures accurate and quick positioning of glass plates of the same size.

Regardless of the transparency or size of the original glass or film negative or transparency, Phase One solutions provide a consistent and reliable workflow, ensuring that the highest levels of image quality and accuracy are met.

Capture One CH is a professional rapid capture solution dedicated to the Cultural Heritage community. Built on the renowned Capture One software, the Cultural Heritage edition offers a highly specialized feature set that delivers a significantly faster reprographic workflow during both capture and post-production.

Camera scanningsetup

With sensitive glass and film transparencies and negatives, material handling and safety are key, and the Phase One Film Capture Stage offers the ideal solution for a wide range of applications.

Perform template matching using one of the template matching methods in OpenCV. This tutorial uses the normalized cross-correlation method.

Cross-correlation (CV_TM_CCORR): It calculates the cross-correlation between the source image and template. A higher score indicates a better match.

Lastly, draw a rectangle around the match. The top-left corner and the bottom-right corner of the rectangle can be calculated using the position of the best match and the template size.

The Phase One iXH Camera System comes with a Schneider Kreuznach 120mm Macro RS lens. The lens is equipped with the Reliance Shutter – rated at 1 million actuations, and allows for reliable and consistent capture of the finest detail with minimum vibration.

QR codescanning camera

The Slipstream mode – a simplified user interface front-end – allows for capturing to be handled by less-skilled operators, and speeds up the workflow, especially when working on large collections and large volumes of documents.

Normalized square difference (CV_TM_SQDIFF_NORMED): This is similar to the Square Difference, but the result is normalized.

The Glass Plate Carriers work with specially-designed “top stop” which ensures accurate and quick positioning of glass plates of the same size.

With a few lines of Python code and OpenCV, template matching becomes a simple task. It's a powerful tool in image processing and can serve as a stepping stone to more complex techniques in computer vision.

The Phase One Film Capture Stage provides an adjustable, geared support mechanism and is compatible with a range of carriers for glass plate negatives, as well as most popular film strip and sheet formats. It can be easily adjusted to position the object directly under the camera. Made of high-grade aluminum, the Phase One Film Capture Stage ensures longevity and reliability for many years.

VALOI

The Phase One Film Capture Stage provides an adjustable, geared support mechanism and is compatible with a range of carriers for glass plate negatives, as well as most popular film strip and sheet formats. It can be easily adjusted to position the object directly under the camera. Made of high-grade aluminum, the Phase One Film Capture Stage ensures longevity and reliability for many years.

In the world of computer vision, template matching is like searching for a specific pattern within a bigger picture. It scans the larger image (source image) with the smaller image (template), trying to find the best match.

Lines 21–29: These lines use matplotlib to display the template and the source image with the rectangle drawn on it. The subplot function is used to create multiple plots in the same figure. The imshow function is used to display an image in each plot.

Docameradetectors work

Phase One’s Film Carriers are designed to work with the Phase One Film Capture Stage, and maintain film flatness with a minimal amount of stress and easy mounting/dismounting. Made from milled high-grade aluminum and using an optically-optimized glass base, they maintain parallelism and flatness.

With sensitive glass and film transparencies and negatives, material handling and safety are key, and the Phase One Film Capture Stage offers the ideal solution for a wide range of applications.

Coefficient correlation (CV_TM_CCOEFF): This method calculates the correlation coefficient between the source image and template. A higher score indicates a better match.

Line 18: This line sketches a rectangle around the optimal match within the source image. The rectangle's top-left corner aligns with the location of the highest match, and its dimensions mirror those of the template in terms of width and height.

This technique uses pixel intensities to identify the similarity. The template is slid across the source image, and a similarity score is calculated for each position. The position with the highest score is considered the best match.

Line 6: These lines load the images from our local directory. The source image is the image we are searching in, and the template is the image we are searching for. The second parameter ‘0’ in the imread function is used to load the image in grayscale mode.

Capture One CH is a professional rapid capture solution dedicated to the Cultural Heritage community. Built on the renowned Capture One software, the Cultural Heritage edition offers a highly specialized feature set that delivers a significantly faster reprographic workflow during both capture and post-production.

Lines 1–2: The OpenCV library (imported as cv2) is used for working with images and the matplotlib library (imported as plt) is used for displaying the images.

Camera scanningapp

Line 9: The function cv2.matchTemplate operates by moving the template image across the input image, akin to a 2D convolution process. For every position, it evaluates how closely the input image’s segment aligns with the given template. The outcome of this function is a grayscale image, where each pixel’s intensity indicates the degree of match between the template and the surrounding region of that particular pixel in the input image.

Template matching is a technique used to find a specific pattern in a bigger image by comparing it to a predefined template. It is a simple but efficient image processing technique. It's extensively used in applications such as face recognition, object detection, and surveillance.

The iXH Camera System is equipped with PPI-Assist, which accurately measures the distance to the object and records PPI, field-of-view and magnification, making it easy to position the iXH on any copy stand for a given scanning application. In combination with the Phase One AutoColumn copy stands and Capture One CH, the iXH Camera System delivers automated camera positioning for a specified PPI.

Line 12: cv2.minMaxLoc is a function in OpenCV which returns the minimum and maximum pixel values and their locations in an image. Here it is used to find the area of the best match (highest value) and its top-left location.